swaptop 1.0.0
htop-style view of which processes are using swap, and how.
This commit is contained in:
Andy Dixon
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/swaptop
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bin/
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*.test
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# Changelog
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## 1.0.0 — 2026-10-07
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First release.
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- htop-style header: swap split into process-owned, swap cache (reserved but
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in RAM) and tmpfs/shm; zswap and zram figures; per-device usage.
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- Per-process SWAP, SWPPSS, DELTA, RSS and SWAPPED columns; per-mapping
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breakdown; search, sort, tree view.
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- Actions: swap a process in, page a process out, flush every swap device,
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send a signal.
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- Settings persist in `~/.config/swaptop/config`.
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Moreover, your license from a particular copyright holder is
|
||||
reinstated permanently if the copyright holder notifies you of the
|
||||
violation by some reasonable means, this is the first time you have
|
||||
received notice of violation of this License (for any work) from that
|
||||
copyright holder, and you cure the violation prior to 30 days after
|
||||
your receipt of the notice.
|
||||
|
||||
Termination of your rights under this section does not terminate the
|
||||
licenses of parties who have received copies or rights from you under
|
||||
this License. If your rights have been terminated and not permanently
|
||||
reinstated, you do not qualify to receive new licenses for the same
|
||||
material under section 10.
|
||||
|
||||
9. Acceptance Not Required for Having Copies.
|
||||
|
||||
You are not required to accept this License in order to receive or
|
||||
run a copy of the Program. Ancillary propagation of a covered work
|
||||
occurring solely as a consequence of using peer-to-peer transmission
|
||||
to receive a copy likewise does not require acceptance. However,
|
||||
nothing other than this License grants you permission to propagate or
|
||||
modify any covered work. These actions infringe copyright if you do
|
||||
not accept this License. Therefore, by modifying or propagating a
|
||||
covered work, you indicate your acceptance of this License to do so.
|
||||
|
||||
10. Automatic Licensing of Downstream Recipients.
|
||||
|
||||
Each time you convey a covered work, the recipient automatically
|
||||
receives a license from the original licensors, to run, modify and
|
||||
propagate that work, subject to this License. You are not responsible
|
||||
for enforcing compliance by third parties with this License.
|
||||
|
||||
An "entity transaction" is a transaction transferring control of an
|
||||
organization, or substantially all assets of one, or subdividing an
|
||||
organization, or merging organizations. If propagation of a covered
|
||||
work results from an entity transaction, each party to that
|
||||
transaction who receives a copy of the work also receives whatever
|
||||
licenses to the work the party's predecessor in interest had or could
|
||||
give under the previous paragraph, plus a right to possession of the
|
||||
Corresponding Source of the work from the predecessor in interest, if
|
||||
the predecessor has it or can get it with reasonable efforts.
|
||||
|
||||
You may not impose any further restrictions on the exercise of the
|
||||
rights granted or affirmed under this License. For example, you may
|
||||
not impose a license fee, royalty, or other charge for exercise of
|
||||
rights granted under this License, and you may not initiate litigation
|
||||
(including a cross-claim or counterclaim in a lawsuit) alleging that
|
||||
any patent claim is infringed by making, using, selling, offering for
|
||||
sale, or importing the Program or any portion of it.
|
||||
|
||||
11. Patents.
|
||||
|
||||
A "contributor" is a copyright holder who authorizes use under this
|
||||
License of the Program or a work on which the Program is based. The
|
||||
work thus licensed is called the contributor's "contributor version".
|
||||
|
||||
A contributor's "essential patent claims" are all patent claims
|
||||
owned or controlled by the contributor, whether already acquired or
|
||||
hereafter acquired, that would be infringed by some manner, permitted
|
||||
by this License, of making, using, or selling its contributor version,
|
||||
but do not include claims that would be infringed only as a
|
||||
consequence of further modification of the contributor version. For
|
||||
purposes of this definition, "control" includes the right to grant
|
||||
patent sublicenses in a manner consistent with the requirements of
|
||||
this License.
|
||||
|
||||
Each contributor grants you a non-exclusive, worldwide, royalty-free
|
||||
patent license under the contributor's essential patent claims, to
|
||||
make, use, sell, offer for sale, import and otherwise run, modify and
|
||||
propagate the contents of its contributor version.
|
||||
|
||||
In the following three paragraphs, a "patent license" is any express
|
||||
agreement or commitment, however denominated, not to enforce a patent
|
||||
(such as an express permission to practice a patent or covenant not to
|
||||
sue for patent infringement). To "grant" such a patent license to a
|
||||
party means to make such an agreement or commitment not to enforce a
|
||||
patent against the party.
|
||||
|
||||
If you convey a covered work, knowingly relying on a patent license,
|
||||
and the Corresponding Source of the work is not available for anyone
|
||||
to copy, free of charge and under the terms of this License, through a
|
||||
publicly available network server or other readily accessible means,
|
||||
then you must either (1) cause the Corresponding Source to be so
|
||||
available, or (2) arrange to deprive yourself of the benefit of the
|
||||
patent license for this particular work, or (3) arrange, in a manner
|
||||
consistent with the requirements of this License, to extend the patent
|
||||
license to downstream recipients. "Knowingly relying" means you have
|
||||
actual knowledge that, but for the patent license, your conveying the
|
||||
covered work in a country, or your recipient's use of the covered work
|
||||
in a country, would infringe one or more identifiable patents in that
|
||||
country that you have reason to believe are valid.
|
||||
|
||||
If, pursuant to or in connection with a single transaction or
|
||||
arrangement, you convey, or propagate by procuring conveyance of, a
|
||||
covered work, and grant a patent license to some of the parties
|
||||
receiving the covered work authorizing them to use, propagate, modify
|
||||
or convey a specific copy of the covered work, then the patent license
|
||||
you grant is automatically extended to all recipients of the covered
|
||||
work and works based on it.
|
||||
|
||||
A patent license is "discriminatory" if it does not include within
|
||||
the scope of its coverage, prohibits the exercise of, or is
|
||||
conditioned on the non-exercise of one or more of the rights that are
|
||||
specifically granted under this License. You may not convey a covered
|
||||
work if you are a party to an arrangement with a third party that is
|
||||
in the business of distributing software, under which you make payment
|
||||
to the third party based on the extent of your activity of conveying
|
||||
the work, and under which the third party grants, to any of the
|
||||
parties who would receive the covered work from you, a discriminatory
|
||||
patent license (a) in connection with copies of the covered work
|
||||
conveyed by you (or copies made from those copies), or (b) primarily
|
||||
for and in connection with specific products or compilations that
|
||||
contain the covered work, unless you entered into that arrangement,
|
||||
or that patent license was granted, prior to 28 March 2007.
|
||||
|
||||
Nothing in this License shall be construed as excluding or limiting
|
||||
any implied license or other defenses to infringement that may
|
||||
otherwise be available to you under applicable patent law.
|
||||
|
||||
12. No Surrender of Others' Freedom.
|
||||
|
||||
If conditions are imposed on you (whether by court order, agreement or
|
||||
otherwise) that contradict the conditions of this License, they do not
|
||||
excuse you from the conditions of this License. If you cannot convey a
|
||||
covered work so as to satisfy simultaneously your obligations under this
|
||||
License and any other pertinent obligations, then as a consequence you may
|
||||
not convey it at all. For example, if you agree to terms that obligate you
|
||||
to collect a royalty for further conveying from those to whom you convey
|
||||
the Program, the only way you could satisfy both those terms and this
|
||||
License would be to refrain entirely from conveying the Program.
|
||||
|
||||
13. Use with the GNU Affero General Public License.
|
||||
|
||||
Notwithstanding any other provision of this License, you have
|
||||
permission to link or combine any covered work with a work licensed
|
||||
under version 3 of the GNU Affero General Public License into a single
|
||||
combined work, and to convey the resulting work. The terms of this
|
||||
License will continue to apply to the part which is the covered work,
|
||||
but the special requirements of the GNU Affero General Public License,
|
||||
section 13, concerning interaction through a network will apply to the
|
||||
combination as such.
|
||||
|
||||
14. Revised Versions of this License.
|
||||
|
||||
The Free Software Foundation may publish revised and/or new versions of
|
||||
the GNU General Public License from time to time. Such new versions will
|
||||
be similar in spirit to the present version, but may differ in detail to
|
||||
address new problems or concerns.
|
||||
|
||||
Each version is given a distinguishing version number. If the
|
||||
Program specifies that a certain numbered version of the GNU General
|
||||
Public License "or any later version" applies to it, you have the
|
||||
option of following the terms and conditions either of that numbered
|
||||
version or of any later version published by the Free Software
|
||||
Foundation. If the Program does not specify a version number of the
|
||||
GNU General Public License, you may choose any version ever published
|
||||
by the Free Software Foundation.
|
||||
|
||||
If the Program specifies that a proxy can decide which future
|
||||
versions of the GNU General Public License can be used, that proxy's
|
||||
public statement of acceptance of a version permanently authorizes you
|
||||
to choose that version for the Program.
|
||||
|
||||
Later license versions may give you additional or different
|
||||
permissions. However, no additional obligations are imposed on any
|
||||
author or copyright holder as a result of your choosing to follow a
|
||||
later version.
|
||||
|
||||
15. Disclaimer of Warranty.
|
||||
|
||||
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
|
||||
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
|
||||
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
|
||||
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
|
||||
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
|
||||
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
|
||||
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
||||
|
||||
16. Limitation of Liability.
|
||||
|
||||
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
|
||||
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
|
||||
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
|
||||
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
|
||||
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
|
||||
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
|
||||
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
|
||||
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
|
||||
SUCH DAMAGES.
|
||||
|
||||
17. Interpretation of Sections 15 and 16.
|
||||
|
||||
If the disclaimer of warranty and limitation of liability provided
|
||||
above cannot be given local legal effect according to their terms,
|
||||
reviewing courts shall apply local law that most closely approximates
|
||||
an absolute waiver of all civil liability in connection with the
|
||||
Program, unless a warranty or assumption of liability accompanies a
|
||||
copy of the Program in return for a fee.
|
||||
|
||||
END OF TERMS AND CONDITIONS
|
||||
|
||||
How to Apply These Terms to Your New Programs
|
||||
|
||||
If you develop a new program, and you want it to be of the greatest
|
||||
possible use to the public, the best way to achieve this is to make it
|
||||
free software which everyone can redistribute and change under these terms.
|
||||
|
||||
To do so, attach the following notices to the program. It is safest
|
||||
to attach them to the start of each source file to most effectively
|
||||
state the exclusion of warranty; and each file should have at least
|
||||
the "copyright" line and a pointer to where the full notice is found.
|
||||
|
||||
<one line to give the program's name and a brief idea of what it does.>
|
||||
Copyright (C) <year> <name of author>
|
||||
|
||||
This program is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <https://www.gnu.org/licenses/>.
|
||||
|
||||
Also add information on how to contact you by electronic and paper mail.
|
||||
|
||||
If the program does terminal interaction, make it output a short
|
||||
notice like this when it starts in an interactive mode:
|
||||
|
||||
<program> Copyright (C) <year> <name of author>
|
||||
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
|
||||
This is free software, and you are welcome to redistribute it
|
||||
under certain conditions; type `show c' for details.
|
||||
|
||||
The hypothetical commands `show w' and `show c' should show the appropriate
|
||||
parts of the General Public License. Of course, your program's commands
|
||||
might be different; for a GUI interface, you would use an "about box".
|
||||
|
||||
You should also get your employer (if you work as a programmer) or school,
|
||||
if any, to sign a "copyright disclaimer" for the program, if necessary.
|
||||
For more information on this, and how to apply and follow the GNU GPL, see
|
||||
<https://www.gnu.org/licenses/>.
|
||||
|
||||
The GNU General Public License does not permit incorporating your program
|
||||
into proprietary programs. If your program is a subroutine library, you
|
||||
may consider it more useful to permit linking proprietary applications with
|
||||
the library. If this is what you want to do, use the GNU Lesser General
|
||||
Public License instead of this License. But first, please read
|
||||
<https://www.gnu.org/licenses/why-not-lgpl.html>.
|
||||
|
||||
@@ -0,0 +1,44 @@
|
||||
BIN := bin
|
||||
VERSION ?= $(shell git describe --tags --always --dirty 2>/dev/null || echo dev)
|
||||
LDFLAGS := -s -w -X main.version=$(VERSION:v%=%)
|
||||
PREFIX ?= /usr/local
|
||||
|
||||
.PHONY: build install man test vet fmt brew-formula repo clean
|
||||
|
||||
build:
|
||||
go build -trimpath -ldflags '$(LDFLAGS)' -o $(BIN)/swaptop .
|
||||
|
||||
install: build
|
||||
install -Dm755 $(BIN)/swaptop $(DESTDIR)$(PREFIX)/bin/swaptop
|
||||
install -Dm644 docs/swaptop.1 $(DESTDIR)$(PREFIX)/share/man/man1/swaptop.1
|
||||
|
||||
man:
|
||||
man -l docs/swaptop.1
|
||||
|
||||
test:
|
||||
go test ./...
|
||||
|
||||
vet:
|
||||
go vet ./...
|
||||
|
||||
fmt:
|
||||
gofmt -w .
|
||||
|
||||
# Homebrew formula for the tagged release. The tag must already be pushed:
|
||||
# the checksum is of GitHub's source tarball for that tag.
|
||||
BREW_REPO := https://github.com/andydixon/swaptop
|
||||
brew-formula:
|
||||
@set -e; v=$(VERSION); v=$${v#v}; \
|
||||
case $$v in *-*) echo "brew-formula: HEAD is not exactly a release tag ($$v)"; exit 1;; esac; \
|
||||
url=$(BREW_REPO)/archive/refs/tags/v$$v.tar.gz; \
|
||||
sum=$$(curl -fsSL "$$url" | sha256sum | cut -d' ' -f1) || { echo "cannot fetch $$url (tag pushed?)"; exit 1; }; \
|
||||
mkdir -p $(BIN)/homebrew; \
|
||||
sed -e '/^#/d' -e "s/@VERSION@/$$v/g" -e "s/@SHA256@/$$sum/" packaging/homebrew/swaptop.rb.in > $(BIN)/homebrew/swaptop.rb; \
|
||||
echo "wrote $(BIN)/homebrew/swaptop.rb (v$$v, sha256 $$sum)"
|
||||
|
||||
# Build .deb/.rpm/Arch packages for the newest tag and publish to repo.dixon.cx.
|
||||
repo:
|
||||
packaging/repo.sh
|
||||
|
||||
clean:
|
||||
rm -rf $(BIN)
|
||||
@@ -1,13 +1,63 @@
|
||||
# swaptop
|
||||
|
||||
htop-style view of who is using swap and how. Linux only.
|
||||
htop-style view of which processes are using swap, and how. Linux only.
|
||||
|
||||
go build -o swaptop . && sudo ./swaptop
|
||||
|
||||
|
||||
Without root you only see full detail for your own processes, and the actions need root.
|
||||
The header splits swap in use into memory owned by processes (green), swap
|
||||
cache (yellow: pages that are in RAM *and* still hold a swap slot, so
|
||||
reserved rather than really swapped out) and tmpfs/shm (magenta). zswap and
|
||||
zram figures appear when present. Each process shows its SWAP, proportional
|
||||
SWPPSS, DELTA since the last refresh, RSS and how much of it is in swap;
|
||||
`Enter` breaks a process down by mapping (heap, stacks, libraries, files).
|
||||
|
||||
Header: swap bar split into green (owned by processes), yellow (swap cache: in RAM *and* holding a swap slot, i.e. reserved but not really swapped out) and magenta (tmpfs/shm, not owned by a process). zswap and zram figures appear when present.
|
||||
Actions, each confirmed first: swap a process back in (`F7`), page a process
|
||||
out (`F8`, `process_madvise`, Linux 5.10+), flush every swap device with
|
||||
swapoff+swapon (`F2`), send a signal (`F9`). Search (`/`), sort (`F6`), tree
|
||||
view (`F5`), zero-swap toggle (`z`), full command line (`c`). Settings
|
||||
persist in `~/.config/swaptop/config`. See `man swaptop`.
|
||||
|
||||
Columns: SWAP (in swap now), SWPPSS (proportional share of shared pages), DELTA (change since last refresh), RSS, SWAPPED (share of the process that is in swap).
|
||||
Run it as root to see every process and use the actions:
|
||||
|
||||
Keys: `Enter` per-mapping breakdown · `F7` swap a process back in · `F8` page a process out (`process_madvise`, Linux 5.10+) · `F2` flush every swap device (swapoff+swapon) · `F9` kill · `F3` `/` search · `F6` `s` sort · `z` show zero-swap processes · `c` full command line · `F1` help · `q` quit.
|
||||
```sh
|
||||
sudo swaptop
|
||||
```
|
||||
|
||||
## Install
|
||||
|
||||
```sh
|
||||
# Homebrew (Linux)
|
||||
brew install andydixon/tap/swaptop
|
||||
|
||||
# Debian, Ubuntu
|
||||
sudo install -d -m 0755 /etc/apt/keyrings
|
||||
curl -fsSL https://repo.dixon.cx/dixon.gpg | sudo tee /etc/apt/keyrings/dixon.gpg >/dev/null
|
||||
echo "deb [signed-by=/etc/apt/keyrings/dixon.gpg] https://repo.dixon.cx/apt stable main" |
|
||||
sudo tee /etc/apt/sources.list.d/dixon.list
|
||||
sudo apt update && sudo apt install swaptop
|
||||
|
||||
# Fedora, RHEL, AlmaLinux, Rocky
|
||||
sudo curl -fsSL -o /etc/yum.repos.d/dixon.repo https://repo.dixon.cx/rpm/dixon.repo
|
||||
sudo dnf install swaptop
|
||||
|
||||
# openSUSE
|
||||
sudo zypper addrepo https://repo.dixon.cx/rpm/dixon.repo
|
||||
sudo zypper install swaptop
|
||||
|
||||
# Arch Linux
|
||||
curl -fsSL https://repo.dixon.cx/dixon.asc | sudo pacman-key --add -
|
||||
sudo pacman-key --lsign-key C22FF7330668417C62C7A304CBC7951D7F2234D1
|
||||
printf '\n[dixon]\nServer = https://repo.dixon.cx/arch/$arch\n' | sudo tee -a /etc/pacman.conf
|
||||
sudo pacman -Sy swaptop
|
||||
|
||||
# From source
|
||||
go install github.com/andydixon/swaptop@latest
|
||||
# or
|
||||
git clone https://github.com/andydixon/swaptop && cd swaptop && make && sudo make install
|
||||
```
|
||||
|
||||
More at [repo.dixon.cx](https://repo.dixon.cx).
|
||||
|
||||
## Licence
|
||||
|
||||
GPL-3.0-or-later. Andy Dixon, [www.dixon.cx](https://www.dixon.cx).
|
||||
|
||||
@@ -0,0 +1,69 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
"path/filepath"
|
||||
"strconv"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// config is ~/.config/swaptop/config: "key = value" lines, rewritten on exit.
|
||||
type config struct {
|
||||
Sort string
|
||||
HideZero bool
|
||||
FullCmd bool
|
||||
Tree bool
|
||||
Refresh float64 // seconds
|
||||
}
|
||||
|
||||
var defaults = config{Sort: "SWAP", HideZero: true, Refresh: 2}
|
||||
|
||||
func configPath() string {
|
||||
dir := os.Getenv("XDG_CONFIG_HOME")
|
||||
if dir == "" {
|
||||
home, _ := os.UserHomeDir()
|
||||
dir = filepath.Join(home, ".config")
|
||||
}
|
||||
return filepath.Join(dir, "swaptop", "config")
|
||||
}
|
||||
|
||||
func loadConfig() config {
|
||||
c := defaults
|
||||
b, err := os.ReadFile(configPath())
|
||||
if err != nil {
|
||||
return c
|
||||
}
|
||||
for _, line := range strings.Split(string(b), "\n") {
|
||||
k, v, ok := strings.Cut(line, "=")
|
||||
if !ok || strings.HasPrefix(strings.TrimSpace(line), "#") {
|
||||
continue
|
||||
}
|
||||
k, v = strings.TrimSpace(k), strings.TrimSpace(v)
|
||||
switch k {
|
||||
case "sort":
|
||||
c.Sort = strings.ToUpper(v)
|
||||
case "hide_zero":
|
||||
c.HideZero = v == "true"
|
||||
case "full_cmd":
|
||||
c.FullCmd = v == "true"
|
||||
case "tree":
|
||||
c.Tree = v == "true"
|
||||
case "refresh":
|
||||
if f, err := strconv.ParseFloat(v, 64); err == nil && f > 0 {
|
||||
c.Refresh = f
|
||||
}
|
||||
}
|
||||
}
|
||||
return c
|
||||
}
|
||||
|
||||
func (c config) save() error {
|
||||
p := configPath()
|
||||
if err := os.MkdirAll(filepath.Dir(p), 0o755); err != nil {
|
||||
return err
|
||||
}
|
||||
return os.WriteFile(p, []byte(fmt.Sprintf(
|
||||
"# swaptop configuration; rewritten when swaptop exits. See swaptop(1).\nsort = %s\nhide_zero = %t\nfull_cmd = %t\ntree = %t\nrefresh = %g\n",
|
||||
c.Sort, c.HideZero, c.FullCmd, c.Tree, c.Refresh)), 0o644)
|
||||
}
|
||||
+277
@@ -0,0 +1,277 @@
|
||||
.\" Manual page for swaptop. View with: man -l docs/swaptop.1
|
||||
.TH SWAPTOP 1 "October 2026" "swaptop 1.0.0" "User Commands"
|
||||
.SH NAME
|
||||
swaptop \- htop\-style view of which processes are using swap, and how
|
||||
.SH SYNOPSIS
|
||||
.B swaptop
|
||||
[\fB\-d\fR \fISECONDS\fR] [\fB\-s\fR \fICOLUMN\fR] [\fB\-t\fR] [\fB\-z\fR]
|
||||
.br
|
||||
.B swaptop
|
||||
\fB\-\-version\fR
|
||||
.SH DESCRIPTION
|
||||
.B swaptop
|
||||
is a full\-screen terminal monitor, laid out like
|
||||
.BR htop (1),
|
||||
that breaks swap usage down by process and by kind. It answers three
|
||||
questions: how much swap is in use, which processes own it, and how much of
|
||||
that is really swapped out to the device rather than merely reserved.
|
||||
.PP
|
||||
It reads
|
||||
.IR /proc/meminfo ,
|
||||
.IR /proc/swaps
|
||||
and, for every process,
|
||||
.IR /proc/PID/status ,
|
||||
.IR /proc/PID/smaps_rollup
|
||||
and
|
||||
.IR /proc/PID/smaps .
|
||||
Nothing is written anywhere except the configuration file (see
|
||||
.BR FILES ).
|
||||
Actions that change memory placement are available from the function keys
|
||||
and always ask for confirmation first.
|
||||
.PP
|
||||
Running as root (\fBsudo swaptop\fR) is recommended: without it the kernel
|
||||
hides the detailed figures and memory of other users' processes (see
|
||||
.BR PERMISSIONS ).
|
||||
.SH OPTIONS
|
||||
Every option overrides the value loaded from the configuration file.
|
||||
.TP
|
||||
.BI \-d " SECONDS"
|
||||
Refresh interval. Fractions are allowed. Default 2.
|
||||
.TP
|
||||
.BI \-s " COLUMN"
|
||||
Sort column, one of
|
||||
.BR SWAP ,
|
||||
.BR SWPPSS ,
|
||||
.BR DELTA ,
|
||||
.BR RSS ,
|
||||
.BR SWAPPED ,
|
||||
.BR PID ,
|
||||
.BR USER ,
|
||||
.BR COMMAND .
|
||||
Default \fBSWAP\fR.
|
||||
.TP
|
||||
.B \-t
|
||||
Start in tree view, processes arranged under their parents.
|
||||
.TP
|
||||
.B \-z
|
||||
Show every process, not only those with memory in swap.
|
||||
.TP
|
||||
.B \-\-version
|
||||
Print the version and exit.
|
||||
.TP
|
||||
.B \-h
|
||||
Print a short usage message and exit.
|
||||
.SH DISPLAY
|
||||
.SS Header
|
||||
.TP
|
||||
.B Swp
|
||||
Swap in use out of the total, as a bar coloured by kind:
|
||||
.RS
|
||||
.TP
|
||||
green
|
||||
attributed to processes.
|
||||
.TP
|
||||
yellow
|
||||
swap cache: pages that are in RAM \fIand\fR still hold a swap slot. They
|
||||
have been read back in (or were written out ahead of time) and the slot is
|
||||
kept so they need not be written again. This is "reserved" swap: it costs
|
||||
nothing to drop and the kernel does so as soon as the device fills up.
|
||||
.TP
|
||||
magenta
|
||||
owned by no process: swapped tmpfs and shared memory files, or slots whose
|
||||
owner cannot be read without root.
|
||||
.RE
|
||||
.TP
|
||||
.B Mem
|
||||
RAM in use, buffers and page cache, as in
|
||||
.BR htop .
|
||||
.TP
|
||||
.B zswap
|
||||
Shown when zswap is active: how much of the used swap is actually held
|
||||
compressed in RAM rather than on the device.
|
||||
.TP
|
||||
Devices
|
||||
One line per entry in
|
||||
.IR /proc/swaps
|
||||
with size, usage and priority. zram devices also show the uncompressed and
|
||||
compressed sizes.
|
||||
.TP
|
||||
Commit
|
||||
Committed address space against the commit limit, then the number of
|
||||
processes with memory in swap and the current sort order.
|
||||
.SS Columns
|
||||
.TP
|
||||
.B PID
|
||||
Process ID.
|
||||
.TP
|
||||
.B USER
|
||||
Owner.
|
||||
.TP
|
||||
.B SWAP
|
||||
Swapped memory this process maps: its own anonymous pages plus any shared
|
||||
memory (shmem, tmpfs, SysV) it has mapped. Shared memory is counted in every
|
||||
process that maps it.
|
||||
.TP
|
||||
.B SWPPSS
|
||||
Proportional set size of the process's anonymous swap: pages shared with
|
||||
other processes (after
|
||||
.BR fork (2))
|
||||
are split between them, so this column sums to the real total. Shared
|
||||
memory files are not counted. Shown as \fB\-\fR when it cannot be read.
|
||||
.TP
|
||||
.B DELTA
|
||||
Change in \fBSWAP\fR since the previous refresh. Red means the process is
|
||||
being swapped out, green that it is coming back in.
|
||||
.TP
|
||||
.B RSS
|
||||
Resident memory, in RAM.
|
||||
.TP
|
||||
.B SWAPPED
|
||||
Share of the process's memory (\fBSWAP\fR plus \fBRSS\fR) that is in swap
|
||||
right now, as a bar and a percentage.
|
||||
.TP
|
||||
.B COMMAND
|
||||
Command name, or the full command line after pressing \fBc\fR. In tree
|
||||
view it is indented under the parent process.
|
||||
.SS Detail view
|
||||
.B Enter
|
||||
opens a breakdown of the selected process by memory mapping, sorted by
|
||||
swap: heap, stacks, shared libraries, anonymous regions and files, each with
|
||||
its swap, proportional swap and resident sizes. This shows \fIwhat\fR has
|
||||
been swapped out, not just how much.
|
||||
.SH KEYS
|
||||
.TP
|
||||
.B Up, Down, PgUp, PgDn, Home, End
|
||||
Move the selection.
|
||||
.TP
|
||||
.B Enter
|
||||
Per\-mapping breakdown of the selected process. \fBEsc\fR or \fBq\fR returns.
|
||||
.TP
|
||||
.B F1, h, ?
|
||||
Help.
|
||||
.TP
|
||||
.B F3, /
|
||||
Incremental search over command line, name, user and PID. \fBEnter\fR keeps
|
||||
the filter, \fBEsc\fR clears it.
|
||||
.TP
|
||||
.B F5, t
|
||||
Toggle tree view. In tree view a process is shown when it or any of its
|
||||
descendants matches, so parents stay for context; processes without swap are
|
||||
dimmed.
|
||||
.TP
|
||||
.B F6, s
|
||||
Cycle the sort column.
|
||||
.TP
|
||||
.B z
|
||||
Toggle between processes with swap only (the default) and all processes.
|
||||
.TP
|
||||
.B c
|
||||
Toggle between the command name and the full command line.
|
||||
.TP
|
||||
.B F10, q
|
||||
Quit, saving the current settings.
|
||||
.SH ACTIONS
|
||||
Each action asks for confirmation before doing anything.
|
||||
.TP
|
||||
.B F7, i \(em swap in
|
||||
Faults every swapped page of the selected process back into RAM by reading
|
||||
it through
|
||||
.IR /proc/PID/mem .
|
||||
The pages to read are found with
|
||||
.IR /proc/PID/pagemap
|
||||
so nothing else is touched. Afterwards the process runs at full speed again.
|
||||
Its swap slots usually remain allocated as swap cache (yellow in the bar)
|
||||
until the kernel needs them or the device is flushed.
|
||||
.TP
|
||||
.B F8, o \(em swap out
|
||||
Asks the kernel to reclaim the selected process's resident memory now, with
|
||||
.BR process_madvise (2)
|
||||
.BR MADV_PAGEOUT
|
||||
(Linux 5.10 or later). Anonymous memory is written to swap; clean file\-backed
|
||||
pages are simply dropped. The process keeps running and faults its memory
|
||||
back as it touches it. Useful for parking an idle but large process.
|
||||
.TP
|
||||
.B F2, F \(em flush
|
||||
Empties every swap device completely by calling
|
||||
.BR swapoff (2)
|
||||
and then
|
||||
.BR swapon (2)
|
||||
on each, in order. Everything in swap is pulled back into RAM and every slot,
|
||||
including swap cache, is released.
|
||||
.B swaptop
|
||||
refuses if available RAM is smaller than the swap in use. Each device's
|
||||
priority is kept; other
|
||||
.BR swapon (8)
|
||||
options such as discard are not reapplied. Needs root.
|
||||
.TP
|
||||
.B F9, k \(em signal
|
||||
Opens a picker of common signals (TERM, KILL, INT, HUP, QUIT, USR1, USR2,
|
||||
STOP, CONT) to send to the selected process.
|
||||
.SH PERMISSIONS
|
||||
Reading another user's
|
||||
.IR smaps_rollup ,
|
||||
.IR smaps ,
|
||||
.IR mem
|
||||
and
|
||||
.I pagemap
|
||||
requires ptrace access to that process, which on most systems
|
||||
(\fIkernel.yama.ptrace_scope\fR = 1) means root or
|
||||
.BR CAP_SYS_PTRACE .
|
||||
Without it the header reports how many swapped processes could not be read,
|
||||
their \fBSWPPSS\fR shows \fB\-\fR and their \fBSWAP\fR counts anonymous
|
||||
memory only; swap in and the detail view fail with a hint to use
|
||||
.BR sudo .
|
||||
Swap out additionally needs
|
||||
.BR CAP_SYS_NICE ,
|
||||
and flush needs
|
||||
.BR CAP_SYS_ADMIN .
|
||||
.SH CONFIGURATION
|
||||
Settings are read from the file below at start\-up and written back when
|
||||
.B swaptop
|
||||
exits, so the sort order, tree view, zero\-swap filter, command\-line display
|
||||
and refresh interval persist between runs. The file holds one
|
||||
.I key = value
|
||||
per line and may be edited by hand:
|
||||
.PP
|
||||
.nf
|
||||
sort = SWAP # see \-s for the names
|
||||
hide_zero = true # false shows every process
|
||||
full_cmd = false
|
||||
tree = false
|
||||
refresh = 2 # seconds
|
||||
.fi
|
||||
.SH FILES
|
||||
.TP
|
||||
.I $XDG_CONFIG_HOME/swaptop/config
|
||||
Configuration, normally
|
||||
.IR ~/.config/swaptop/config .
|
||||
When run under
|
||||
.BR sudo (8)
|
||||
this is root's home unless \fBXDG_CONFIG_HOME\fR is passed through.
|
||||
.TP
|
||||
.IR /proc/meminfo ", " /proc/swaps ", " /proc/PID/*
|
||||
Data sources. See
|
||||
.BR proc (5).
|
||||
.SH EXIT STATUS
|
||||
0 on a normal quit, 1 if the terminal cannot be initialised, 2 on a bad
|
||||
option.
|
||||
.SH NOTES
|
||||
Swap cache explains most apparent mismatches: a process can show 0 in
|
||||
\fBSWAP\fR while the device's usage barely drops, because the slots are kept
|
||||
until needed. Flushing (\fBF2\fR) is the only way to release them on demand.
|
||||
.PP
|
||||
The \fBSWAP\fR column of processes sharing memory (database workers, for
|
||||
example) double counts that memory, by design, so that each process shows
|
||||
what it would have to fault in. The header's "in processes" figure uses
|
||||
\fBSWPPSS\fR and does not double count.
|
||||
.SH SEE ALSO
|
||||
.BR htop (1),
|
||||
.BR free (1),
|
||||
.BR vmstat (8),
|
||||
.BR swapon (8),
|
||||
.BR proc (5),
|
||||
.BR process_madvise (2)
|
||||
.SH AUTHOR
|
||||
Andy Dixon <andy@dixon.cx>, https://www.dixon.cx
|
||||
.SH BUGS
|
||||
Report at https://github.com/andydixon/swaptop/issues
|
||||
@@ -1,6 +1,7 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"flag"
|
||||
"fmt"
|
||||
"os"
|
||||
"sort"
|
||||
@@ -12,6 +13,8 @@ import (
|
||||
"github.com/gdamore/tcell/v2"
|
||||
)
|
||||
|
||||
var version = "dev"
|
||||
|
||||
type view int
|
||||
|
||||
const (
|
||||
@@ -22,14 +25,28 @@ const (
|
||||
|
||||
var sortNames = []string{"SWAP", "SWPPSS", "DELTA", "RSS", "SWAPPED", "PID", "USER", "COMMAND"}
|
||||
|
||||
var signals = []struct {
|
||||
name string
|
||||
sig syscall.Signal
|
||||
}{
|
||||
{"SIGTERM", syscall.SIGTERM}, {"SIGKILL", syscall.SIGKILL}, {"SIGINT", syscall.SIGINT}, {"SIGHUP", syscall.SIGHUP},
|
||||
{"SIGQUIT", syscall.SIGQUIT}, {"SIGUSR1", syscall.SIGUSR1}, {"SIGUSR2", syscall.SIGUSR2},
|
||||
{"SIGSTOP", syscall.SIGSTOP}, {"SIGCONT", syscall.SIGCONT},
|
||||
}
|
||||
|
||||
// modal is a yes/no question (onYes), an info box (neither) or a picker (items/onPick).
|
||||
type modal struct {
|
||||
title string
|
||||
lines []string
|
||||
onYes func() // nil = info box
|
||||
onYes func()
|
||||
items []string
|
||||
pick int
|
||||
onPick func(int)
|
||||
}
|
||||
|
||||
type app struct {
|
||||
scr tcell.Screen
|
||||
cfg config
|
||||
sys *Sys
|
||||
prev map[int]uint64
|
||||
rows []Proc
|
||||
@@ -39,6 +56,7 @@ type app struct {
|
||||
searching bool
|
||||
hideZero bool
|
||||
fullCmd bool
|
||||
tree bool
|
||||
view view
|
||||
detail Proc
|
||||
maps []Mapping
|
||||
@@ -67,7 +85,37 @@ var (
|
||||
stRed = tcell.StyleDefault.Foreground(tcell.ColorRed)
|
||||
)
|
||||
|
||||
func sortIndex(name string) int {
|
||||
for i, n := range sortNames {
|
||||
if n == strings.ToUpper(name) {
|
||||
return i
|
||||
}
|
||||
}
|
||||
return 0
|
||||
}
|
||||
|
||||
func main() {
|
||||
cfg := loadConfig()
|
||||
flag.Usage = func() {
|
||||
fmt.Fprintf(os.Stderr, "Usage: swaptop [-d SECONDS] [-s COLUMN] [-t] [-z] [--version]\n\nhtop-style view of swap usage per process. Press F1 inside for keys.\n\n")
|
||||
flag.PrintDefaults()
|
||||
}
|
||||
delay := flag.Float64("d", cfg.Refresh, "refresh interval in seconds")
|
||||
sortFlag := flag.String("s", cfg.Sort, "sort column: "+strings.Join(sortNames, ", "))
|
||||
tree := flag.Bool("t", cfg.Tree, "show the process tree")
|
||||
all := flag.Bool("z", !cfg.HideZero, "show processes with no swap too")
|
||||
ver := flag.Bool("version", false, "print the version and exit")
|
||||
flag.Parse()
|
||||
if *ver {
|
||||
fmt.Println("swaptop", version)
|
||||
return
|
||||
}
|
||||
if *delay <= 0 {
|
||||
fmt.Fprintln(os.Stderr, "swaptop: -d must be positive")
|
||||
os.Exit(2)
|
||||
}
|
||||
cfg.Refresh = *delay
|
||||
|
||||
scr, err := tcell.NewScreen()
|
||||
if err == nil {
|
||||
err = scr.Init()
|
||||
@@ -76,8 +124,7 @@ func main() {
|
||||
fmt.Fprintln(os.Stderr, "swaptop:", err)
|
||||
os.Exit(1)
|
||||
}
|
||||
defer scr.Fini()
|
||||
a := &app{scr: scr, hideZero: true}
|
||||
a := &app{scr: scr, cfg: cfg, sortBy: sortIndex(*sortFlag), tree: *tree, hideZero: !*all, fullCmd: cfg.FullCmd}
|
||||
a.sample()
|
||||
events := make(chan tcell.Event, 64)
|
||||
go func() {
|
||||
@@ -89,18 +136,24 @@ func main() {
|
||||
events <- ev
|
||||
}
|
||||
}()
|
||||
tick := time.NewTicker(2 * time.Second)
|
||||
tick := time.NewTicker(time.Duration(cfg.Refresh * float64(time.Second)))
|
||||
loop:
|
||||
for {
|
||||
a.draw()
|
||||
select {
|
||||
case ev := <-events:
|
||||
if a.handle(ev) {
|
||||
return
|
||||
break loop
|
||||
}
|
||||
case <-tick.C:
|
||||
a.sample()
|
||||
}
|
||||
}
|
||||
scr.Fini()
|
||||
cfg.Sort, cfg.HideZero, cfg.FullCmd, cfg.Tree = sortNames[a.sortBy], a.hideZero, a.fullCmd, a.tree
|
||||
if err := cfg.save(); err != nil {
|
||||
fmt.Fprintln(os.Stderr, "swaptop: saving config:", err)
|
||||
}
|
||||
}
|
||||
|
||||
func (a *app) sample() {
|
||||
@@ -127,24 +180,7 @@ func pct(p Proc) int {
|
||||
return int(p.Swap * 100 / (p.Swap + p.RSS))
|
||||
}
|
||||
|
||||
func (a *app) rebuild() {
|
||||
selPID := -1
|
||||
if a.sel < len(a.rows) {
|
||||
selPID = a.rows[a.sel].PID
|
||||
}
|
||||
a.rows = a.rows[:0]
|
||||
f := strings.ToLower(a.filter)
|
||||
for _, p := range a.sys.Procs {
|
||||
if a.hideZero && p.Swap == 0 {
|
||||
continue
|
||||
}
|
||||
if f != "" && !strings.Contains(strings.ToLower(p.Cmd+" "+p.Comm+" "+p.User+" "+fmt.Sprint(p.PID)), f) {
|
||||
continue
|
||||
}
|
||||
a.rows = append(a.rows, p)
|
||||
}
|
||||
sort.SliceStable(a.rows, func(i, j int) bool {
|
||||
x, y := a.rows[i], a.rows[j]
|
||||
func (a *app) less(x, y Proc) bool {
|
||||
switch sortNames[a.sortBy] {
|
||||
case "SWPPSS":
|
||||
return x.SwapPss > y.SwapPss
|
||||
@@ -162,7 +198,32 @@ func (a *app) rebuild() {
|
||||
return x.Comm < y.Comm
|
||||
}
|
||||
return x.Swap > y.Swap
|
||||
})
|
||||
}
|
||||
|
||||
func (a *app) visible(p Proc) bool {
|
||||
if a.hideZero && p.Swap == 0 {
|
||||
return false
|
||||
}
|
||||
f := strings.ToLower(a.filter)
|
||||
return f == "" || strings.Contains(strings.ToLower(p.Cmd+" "+p.Comm+" "+p.User+" "+fmt.Sprint(p.PID)), f)
|
||||
}
|
||||
|
||||
func (a *app) rebuild() {
|
||||
selPID := -1
|
||||
if a.sel < len(a.rows) {
|
||||
selPID = a.rows[a.sel].PID
|
||||
}
|
||||
a.rows = a.rows[:0]
|
||||
if a.tree {
|
||||
a.buildTree()
|
||||
} else {
|
||||
for _, p := range a.sys.Procs {
|
||||
if a.visible(p) {
|
||||
a.rows = append(a.rows, p)
|
||||
}
|
||||
}
|
||||
sort.SliceStable(a.rows, func(i, j int) bool { return a.less(a.rows[i], a.rows[j]) })
|
||||
}
|
||||
a.sel = 0
|
||||
for i, p := range a.rows {
|
||||
if p.PID == selPID {
|
||||
@@ -171,6 +232,71 @@ func (a *app) rebuild() {
|
||||
}
|
||||
}
|
||||
|
||||
// buildTree lays processes out by parent, htop style. A process is shown if it
|
||||
// or any descendant passes the filter, so ancestors stay for context.
|
||||
func (a *app) buildTree() {
|
||||
kids := map[int][]Proc{}
|
||||
present := map[int]bool{}
|
||||
for _, p := range a.sys.Procs {
|
||||
present[p.PID] = true
|
||||
}
|
||||
for _, p := range a.sys.Procs {
|
||||
kids[p.PPID] = append(kids[p.PPID], p)
|
||||
}
|
||||
for _, k := range kids {
|
||||
sort.SliceStable(k, func(i, j int) bool { return a.less(k[i], k[j]) })
|
||||
}
|
||||
keep := map[int]bool{}
|
||||
var mark func(p Proc) bool
|
||||
mark = func(p Proc) bool {
|
||||
ok := a.visible(p)
|
||||
for _, c := range kids[p.PID] {
|
||||
if mark(c) {
|
||||
ok = true
|
||||
}
|
||||
}
|
||||
keep[p.PID] = ok
|
||||
return ok
|
||||
}
|
||||
var walk func(p Proc, prefix string, branch string)
|
||||
walk = func(p Proc, prefix, branch string) {
|
||||
p.Tree = prefix + branch
|
||||
a.rows = append(a.rows, p)
|
||||
var shown []Proc
|
||||
for _, c := range kids[p.PID] {
|
||||
if keep[c.PID] {
|
||||
shown = append(shown, c)
|
||||
}
|
||||
}
|
||||
childPrefix := prefix
|
||||
if branch != "" {
|
||||
childPrefix += "│ "
|
||||
if branch == "└─ " {
|
||||
childPrefix = prefix + " "
|
||||
}
|
||||
}
|
||||
for i, c := range shown {
|
||||
b := "├─ "
|
||||
if i == len(shown)-1 {
|
||||
b = "└─ "
|
||||
}
|
||||
walk(c, childPrefix, b)
|
||||
}
|
||||
}
|
||||
var roots []Proc
|
||||
for _, p := range a.sys.Procs {
|
||||
if !present[p.PPID] || p.PPID == p.PID {
|
||||
roots = append(roots, p)
|
||||
}
|
||||
}
|
||||
sort.SliceStable(roots, func(i, j int) bool { return a.less(roots[i], roots[j]) })
|
||||
for _, r := range roots {
|
||||
if mark(r) {
|
||||
walk(r, "", "")
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// ---- input ----
|
||||
|
||||
func (a *app) handle(ev tcell.Event) (quit bool) {
|
||||
@@ -188,18 +314,39 @@ func (a *app) handle(ev tcell.Event) (quit bool) {
|
||||
return false
|
||||
}
|
||||
|
||||
func (a *app) key(ev *tcell.EventKey) bool {
|
||||
if ev.Key() == tcell.KeyCtrlC {
|
||||
return true
|
||||
}
|
||||
if m := a.modal; m != nil {
|
||||
func (a *app) modalKey(ev *tcell.EventKey) {
|
||||
m := a.modal
|
||||
switch {
|
||||
case m.items != nil:
|
||||
switch ev.Key() {
|
||||
case tcell.KeyUp:
|
||||
m.pick = max(m.pick-1, 0)
|
||||
case tcell.KeyDown:
|
||||
m.pick = min(m.pick+1, len(m.items)-1)
|
||||
case tcell.KeyEnter:
|
||||
a.modal = nil
|
||||
m.onPick(m.pick)
|
||||
case tcell.KeyEscape:
|
||||
a.modal = nil
|
||||
case tcell.KeyRune:
|
||||
if ev.Rune() == 'q' {
|
||||
a.modal = nil
|
||||
}
|
||||
}
|
||||
case m.onYes != nil && (ev.Rune() == 'y' || ev.Rune() == 'Y'):
|
||||
a.modal = nil
|
||||
m.onYes()
|
||||
case m.onYes == nil || ev.Key() == tcell.KeyEscape || ev.Rune() == 'n' || ev.Rune() == 'N' || ev.Rune() == 'q':
|
||||
a.modal = nil
|
||||
}
|
||||
}
|
||||
|
||||
func (a *app) key(ev *tcell.EventKey) bool {
|
||||
if ev.Key() == tcell.KeyCtrlC {
|
||||
return true
|
||||
}
|
||||
if a.modal != nil {
|
||||
a.modalKey(ev)
|
||||
return false
|
||||
}
|
||||
if a.searching {
|
||||
@@ -223,12 +370,9 @@ func (a *app) key(ev *tcell.EventKey) bool {
|
||||
return false
|
||||
}
|
||||
n := len(a.rows)
|
||||
if a.view == viewDetail {
|
||||
n = len(a.maps)
|
||||
}
|
||||
pos := &a.sel
|
||||
if a.view == viewDetail {
|
||||
pos = &a.dtop
|
||||
n, pos = len(a.maps), &a.dtop
|
||||
}
|
||||
_, h := a.scr.Size()
|
||||
pg := max(h-10, 1)
|
||||
@@ -261,9 +405,10 @@ func (a *app) key(ev *tcell.EventKey) bool {
|
||||
a.askFlush()
|
||||
case tcell.KeyF3:
|
||||
a.searching = true
|
||||
case tcell.KeyF5:
|
||||
a.toggleTree()
|
||||
case tcell.KeyF6:
|
||||
a.sortBy = (a.sortBy + 1) % len(sortNames)
|
||||
a.rebuild()
|
||||
a.cycleSort()
|
||||
case tcell.KeyF7:
|
||||
a.askSwapIn()
|
||||
case tcell.KeyF8:
|
||||
@@ -284,8 +429,9 @@ func (a *app) key(ev *tcell.EventKey) bool {
|
||||
case '/':
|
||||
a.searching = true
|
||||
case 's':
|
||||
a.sortBy = (a.sortBy + 1) % len(sortNames)
|
||||
a.rebuild()
|
||||
a.cycleSort()
|
||||
case 't':
|
||||
a.toggleTree()
|
||||
case 'z':
|
||||
a.hideZero = !a.hideZero
|
||||
a.rebuild()
|
||||
@@ -305,6 +451,16 @@ func (a *app) key(ev *tcell.EventKey) bool {
|
||||
return false
|
||||
}
|
||||
|
||||
func (a *app) cycleSort() {
|
||||
a.sortBy = (a.sortBy + 1) % len(sortNames)
|
||||
a.rebuild()
|
||||
}
|
||||
|
||||
func (a *app) toggleTree() {
|
||||
a.tree = !a.tree
|
||||
a.rebuild()
|
||||
}
|
||||
|
||||
func (a *app) current() (Proc, bool) {
|
||||
if a.view == viewDetail {
|
||||
return a.detail, true
|
||||
@@ -393,10 +549,18 @@ func (a *app) askKill() {
|
||||
if !ok {
|
||||
return
|
||||
}
|
||||
a.modal = &modal{title: "Kill", lines: []string{fmt.Sprintf("Send SIGTERM to %s (%d)?", p.Comm, p.PID)}, onYes: func() {
|
||||
if err := syscall.Kill(p.PID, syscall.SIGTERM); err != nil {
|
||||
a.info("Kill failed", err.Error()+permHint(err))
|
||||
items := make([]string, len(signals))
|
||||
for i, s := range signals {
|
||||
items[i] = fmt.Sprintf("%2d %s", int(s.sig), s.name)
|
||||
}
|
||||
a.modal = &modal{title: fmt.Sprintf("Send signal to %s (%d)", p.Comm, p.PID), items: items, onPick: func(i int) {
|
||||
if err := syscall.Kill(p.PID, signals[i].sig); err != nil {
|
||||
a.info("Signal failed", err.Error()+permHint(err))
|
||||
return
|
||||
}
|
||||
a.mu.Lock()
|
||||
a.status = fmt.Sprintf("Sent %s to %s (%d).", signals[i].name, p.Comm, p.PID)
|
||||
a.mu.Unlock()
|
||||
}}
|
||||
}
|
||||
|
||||
@@ -542,6 +706,9 @@ func (a *app) drawHeader(w int) int {
|
||||
}
|
||||
line := fmt.Sprintf("Commit %s / %s %d of %d processes in swap sort: %s", human(m["Committed_AS"]), human(m["CommitLimit"]),
|
||||
a.sys.Swapped, len(a.sys.Procs), sortNames[a.sortBy])
|
||||
if a.tree {
|
||||
line += " tree"
|
||||
}
|
||||
if a.hideZero {
|
||||
line += " (z: show all)"
|
||||
}
|
||||
@@ -631,6 +798,14 @@ func (a *app) drawList(w, h int) {
|
||||
if a.fullCmd {
|
||||
cmd = p.Cmd
|
||||
}
|
||||
tst := stDim
|
||||
if i == a.sel {
|
||||
tst = stSel
|
||||
}
|
||||
x = a.put(x, y, p.Tree, tst)
|
||||
if a.tree && p.Swap == 0 && i != a.sel {
|
||||
st = stDim
|
||||
}
|
||||
a.put(x, y, cmd, st)
|
||||
y++
|
||||
}
|
||||
@@ -671,7 +846,7 @@ func (a *app) drawDetail(w, h int) {
|
||||
|
||||
func (a *app) drawHelp() {
|
||||
lines := []string{
|
||||
"swaptop - who is using swap, and how",
|
||||
"swaptop " + version + " - who is using swap, and how",
|
||||
"",
|
||||
"Columns",
|
||||
" SWAP swapped memory this process maps: its anonymous pages plus any shared memory (shmem/tmpfs) it has mapped",
|
||||
@@ -689,12 +864,13 @@ func (a *app) drawHelp() {
|
||||
" F7 i swap in: fault every swapped page of the process back into RAM (reads /proc/PID/mem)",
|
||||
" F8 o swap out: ask the kernel to reclaim the process's pages now (process_madvise MADV_PAGEOUT, Linux 5.10+)",
|
||||
" F2 F flush: swapoff + swapon every device, emptying swap completely (root, needs enough free RAM)",
|
||||
" F9 k kill (SIGTERM)",
|
||||
" F9 k send a signal (picker)",
|
||||
"",
|
||||
"Keys",
|
||||
" Up/Down PgUp/PgDn Home/End move Enter per-mapping breakdown of the selected process",
|
||||
" F3 / search F6 s sort z show/hide processes with no swap c full command line F10 q quit",
|
||||
" F3 / search F6 s sort F5 t tree view z show/hide processes with no swap c full command line F10 q quit",
|
||||
"",
|
||||
"Settings (sort, tree, z, c, refresh) are saved to " + configPath() + " on exit.",
|
||||
"Non-root: SWPPSS and actions only work for your own processes (kernel.yama.ptrace_scope).",
|
||||
"",
|
||||
"Press any key to return.",
|
||||
@@ -715,7 +891,7 @@ func (a *app) drawBottom(w, h int) {
|
||||
a.put(0, y, "Search: "+a.filter+"_", stWarn)
|
||||
return
|
||||
}
|
||||
keys := [][2]string{{"F1", "Help"}, {"F2", "Flush"}, {"F3", "Search"}, {"F6", "SortBy"}, {"F7", "SwapIn"}, {"F8", "SwapOut"}, {"F9", "Kill"}, {"F10", "Quit"}}
|
||||
keys := [][2]string{{"F1", "Help"}, {"F2", "Flush"}, {"F3", "Search"}, {"F5", "Tree"}, {"F6", "SortBy"}, {"F7", "SwapIn"}, {"F8", "SwapOut"}, {"F9", "Kill"}, {"F10", "Quit"}}
|
||||
if a.view != viewList {
|
||||
keys = [][2]string{{"Esc", "Back"}, {"F7", "SwapIn"}, {"F8", "SwapOut"}, {"F9", "Kill"}, {"F10", "Quit"}}
|
||||
}
|
||||
@@ -729,9 +905,13 @@ func (a *app) drawBottom(w, h int) {
|
||||
func (a *app) drawModal(w, h int) {
|
||||
m := a.modal
|
||||
lines := append([]string{}, m.lines...)
|
||||
if m.onYes != nil {
|
||||
switch {
|
||||
case m.items != nil:
|
||||
lines = append(lines, m.items...)
|
||||
lines = append(lines, "", "[Enter] send [Esc] cancel")
|
||||
case m.onYes != nil:
|
||||
lines = append(lines, "", "[y] yes [n] no")
|
||||
} else {
|
||||
default:
|
||||
lines = append(lines, "", "[Enter] ok")
|
||||
}
|
||||
bw := len(m.title)
|
||||
@@ -749,7 +929,14 @@ func (a *app) drawModal(w, h int) {
|
||||
}
|
||||
a.put(x0+2, y0, m.title, st.Bold(true))
|
||||
for i, l := range lines {
|
||||
a.put(x0+2, y0+1+i, l, st)
|
||||
ls := st
|
||||
if m.items != nil && i >= len(m.lines) && i-len(m.lines) == m.pick {
|
||||
ls = stSel
|
||||
for x := x0 + 1; x < x0+bw-1; x++ {
|
||||
a.scr.SetContent(x, y0+1+i, ' ', nil, ls)
|
||||
}
|
||||
}
|
||||
a.put(x0+2, y0+1+i, l, ls)
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@@ -0,0 +1,24 @@
|
||||
# Homebrew formula template for swaptop. `make brew-formula` fills in the
|
||||
# version and the checksum of the GitHub source tarball and writes the
|
||||
# result to bin/homebrew/swaptop.rb; copy that into your tap
|
||||
# (github.com/andydixon/homebrew-tap, Formula/swaptop.rb).
|
||||
class Swaptop < Formula
|
||||
desc "Htop-style view of which processes are using swap, and how"
|
||||
homepage "https://github.com/andydixon/swaptop"
|
||||
url "https://github.com/andydixon/swaptop/archive/refs/tags/v@VERSION@.tar.gz"
|
||||
sha256 "@SHA256@"
|
||||
license "GPL-3.0-or-later"
|
||||
head "https://github.com/andydixon/swaptop.git", branch: "master"
|
||||
|
||||
depends_on "go" => :build
|
||||
depends_on :linux
|
||||
|
||||
def install
|
||||
system "go", "build", *std_go_args(ldflags: "-s -w -X main.version=#{version}")
|
||||
man1.install "docs/swaptop.1"
|
||||
end
|
||||
|
||||
test do
|
||||
assert_match version.to_s, shell_output("#{bin}/swaptop --version")
|
||||
end
|
||||
end
|
||||
Executable
+196
@@ -0,0 +1,196 @@
|
||||
#!/usr/bin/env bash
|
||||
# Build Linux packages (.deb, .rpm, Arch .pkg.tar.zst) for a release tag and
|
||||
# publish them to the signed apt, dnf and pacman repositories served at
|
||||
# https://repo.dixon.cx.
|
||||
#
|
||||
# packaging/repo.sh # the newest tag
|
||||
# packaging/repo.sh v1.0.0 # a given tag
|
||||
#
|
||||
# Builds from a clean export of the tag, so the working tree doesn't matter.
|
||||
# Every index is rebuilt over all the packages in the repository, so other
|
||||
# projects publishing there with their copy of this script are kept.
|
||||
#
|
||||
# Needs: go, docker, gpg, apt-ftparchive (apt-utils), flock.
|
||||
# REPO_DIR where the repository lives (default below)
|
||||
# REPO_GNUPGHOME GnuPG home holding the signing key (default below)
|
||||
# ARCHS Go architectures to package (default below)
|
||||
#
|
||||
# The same script, with its own project block, is in mapsize and vault.
|
||||
set -euo pipefail
|
||||
|
||||
# ---- project ---------------------------------------------------------------
|
||||
NAME=swaptop # the command
|
||||
PACKAGE=swaptop
|
||||
CONFLICTS=
|
||||
SUMMARY="htop-style view of which processes are using swap, and how"
|
||||
HOMEPAGE=https://github.com/andydixon/swaptop
|
||||
LICENSE=GPL-3.0-or-later
|
||||
MANPAGES=docs/*.1
|
||||
DOCS="README.md CHANGELOG.md LICENSE"
|
||||
# build OUT: build the binary to OUT, in the source tree, with GOOS, GOARCH
|
||||
# and GOARM set and VERSION the release.
|
||||
build() {
|
||||
CGO_ENABLED=0 go build -trimpath \
|
||||
-ldflags "-s -w -X main.version=$VERSION" \
|
||||
-o "$1" .
|
||||
}
|
||||
# ----------------------------------------------------------------------------
|
||||
|
||||
REPO_DIR=${REPO_DIR:-/home/andy/domains/repo.dixon.cx/public_html}
|
||||
REPO_GNUPGHOME=${REPO_GNUPGHOME:-$HOME/.config/repo.dixon.cx/gnupg}
|
||||
ARCHS=${ARCHS:-"amd64 arm64 arm 386 riscv64"}
|
||||
NFPM="go run github.com/goreleaser/nfpm/v2/cmd/nfpm@v2.41.1"
|
||||
SUITE=stable
|
||||
COMPONENT=main
|
||||
ARCH_REPO=dixon # the pacman repository name: [dixon]
|
||||
|
||||
say() { echo "repo: $*" >&2; }
|
||||
die() { say "$*"; exit 1; }
|
||||
|
||||
for tool in go docker gpg apt-ftparchive flock; do
|
||||
command -v $tool >/dev/null || die "needs $tool"
|
||||
done
|
||||
[[ -d $REPO_DIR ]] || die "$REPO_DIR does not exist"
|
||||
export GNUPGHOME=$REPO_GNUPGHOME
|
||||
KEY=$(gpg --list-secret-keys --with-colons 2>/dev/null | awk -F: '/^fpr/{print $10; exit}')
|
||||
[[ -n $KEY ]] || die "no signing key in $GNUPGHOME"
|
||||
|
||||
cd "$(git rev-parse --show-toplevel)"
|
||||
TAG=${1:-$(git describe --tags --abbrev=0)}
|
||||
git rev-parse -q --verify "refs/tags/$TAG" >/dev/null || die "no tag $TAG"
|
||||
VERSION=${TAG#v}
|
||||
export VERSION
|
||||
|
||||
WORK=$(mktemp -d)
|
||||
trap 'rm -rf "$WORK"' EXIT
|
||||
git archive "$TAG" | tar -x -C "$WORK" --one-top-level=src
|
||||
gpg --batch --armor --export-secret-keys "$KEY" >"$WORK/signing.asc"
|
||||
|
||||
# ---- build -----------------------------------------------------------------
|
||||
say "building $PACKAGE $VERSION for $ARCHS"
|
||||
mkdir -p "$WORK/out"
|
||||
for arch in $ARCHS; do
|
||||
goarm= nfarch=$arch
|
||||
[[ $arch == arm ]] && goarm=7 nfarch=arm7
|
||||
(cd "$WORK/src" && GOOS=linux GOARCH=$arch GOARM=$goarm build "$WORK/bin-$arch/$NAME")
|
||||
{
|
||||
cat <<-EOF
|
||||
name: $PACKAGE
|
||||
arch: $nfarch
|
||||
platform: linux
|
||||
version: $VERSION
|
||||
release: 1
|
||||
maintainer: Andy Dixon <andy@dixon.cx>
|
||||
description: $SUMMARY
|
||||
homepage: $HOMEPAGE
|
||||
license: $LICENSE
|
||||
conflicts: [${CONFLICTS:-}]
|
||||
contents:
|
||||
- src: $WORK/bin-$arch/$NAME
|
||||
dst: /usr/bin/$NAME
|
||||
file_info: {mode: 0755}
|
||||
EOF
|
||||
for m in $(cd "$WORK/src" && ls $MANPAGES); do
|
||||
printf ' - src: %s\n dst: /usr/share/man/man1/%s\n file_info: {mode: 0644}\n' \
|
||||
"$WORK/src/$m" "$(basename "$m")"
|
||||
done
|
||||
for d in $DOCS; do
|
||||
printf ' - src: %s\n dst: /usr/share/doc/%s/%s\n file_info: {mode: 0644}\n' \
|
||||
"$WORK/src/$d" "$PACKAGE" "$d"
|
||||
done
|
||||
printf 'rpm:\n signature:\n key_file: %s\n' "$WORK/signing.asc"
|
||||
} >"$WORK/nfpm-$arch.yaml"
|
||||
for fmt in deb rpm archlinux; do
|
||||
$NFPM pkg -f "$WORK/nfpm-$arch.yaml" -p $fmt -t "$WORK/out/" >/dev/null
|
||||
done
|
||||
done
|
||||
|
||||
# ---- publish ---------------------------------------------------------------
|
||||
# One publisher at a time: the indexes cover every project's packages.
|
||||
exec 9>"$REPO_DIR/../.publish.lock"
|
||||
flock 9
|
||||
say "publishing to $REPO_DIR"
|
||||
gpg --batch --armor --export "$KEY" >"$REPO_DIR/dixon.asc"
|
||||
gpg --batch --export "$KEY" >"$REPO_DIR/dixon.gpg"
|
||||
sign() { gpg --batch --yes --local-user "$KEY" "$@"; }
|
||||
|
||||
# apt: pool/main/<letter>/<name>/, indexed by apt-ftparchive.
|
||||
pool=$REPO_DIR/apt/pool/$COMPONENT/${PACKAGE:0:1}/$PACKAGE
|
||||
mkdir -p "$pool"
|
||||
cp "$WORK"/out/*.deb "$pool/"
|
||||
(
|
||||
cd "$REPO_DIR/apt"
|
||||
# Built beside the live suite and swapped in, so clients never see half.
|
||||
dists=dists/.$SUITE.new
|
||||
rm -rf "$dists"
|
||||
debarchs=$(find pool -name '*.deb' | sed -E 's/.*_([^_]+)\.deb$/\1/' | sort -u | tr '\n' ' ')
|
||||
for a in $debarchs; do
|
||||
d=$dists/$COMPONENT/binary-$a
|
||||
mkdir -p "$d"
|
||||
apt-ftparchive --arch "$a" packages pool >"$d/Packages"
|
||||
gzip -9kn "$d/Packages"
|
||||
done
|
||||
apt-ftparchive \
|
||||
-o APT::FTPArchive::Release::Origin=repo.dixon.cx \
|
||||
-o APT::FTPArchive::Release::Label=repo.dixon.cx \
|
||||
-o APT::FTPArchive::Release::Suite=$SUITE \
|
||||
-o APT::FTPArchive::Release::Codename=$SUITE \
|
||||
-o APT::FTPArchive::Release::Components=$COMPONENT \
|
||||
-o "APT::FTPArchive::Release::Architectures=${debarchs% }" \
|
||||
release "$dists" >"$WORK/Release"
|
||||
mv "$WORK/Release" "$dists/Release"
|
||||
sign --clearsign -o "$dists/InRelease" "$dists/Release"
|
||||
sign --armor --detach-sign -o "$dists/Release.gpg" "$dists/Release"
|
||||
rm -rf "dists/.$SUITE.old"
|
||||
[[ -d dists/$SUITE ]] && mv "dists/$SUITE" "dists/.$SUITE.old"
|
||||
mv "$dists" "dists/$SUITE"
|
||||
rm -rf "dists/.$SUITE.old"
|
||||
)
|
||||
|
||||
# dnf: every architecture in one directory; dnf picks its own.
|
||||
mkdir -p "$REPO_DIR/rpm"
|
||||
cp "$WORK"/out/*.rpm "$REPO_DIR/rpm/"
|
||||
docker image inspect repo-tools:fedora >/dev/null 2>&1 ||
|
||||
docker build -q -t repo-tools:fedora - >/dev/null <<-'EOF'
|
||||
FROM fedora:42
|
||||
RUN dnf -y install createrepo_c && dnf clean all
|
||||
EOF
|
||||
docker run --rm --user "$(id -u):$(id -g)" -v "$REPO_DIR/rpm:/repo" repo-tools:fedora \
|
||||
createrepo_c --quiet --update --general-compress-type=gz /repo
|
||||
sign --armor --detach-sign -o "$REPO_DIR/rpm/repodata/repomd.xml.asc" "$REPO_DIR/rpm/repodata/repomd.xml"
|
||||
cat >"$REPO_DIR/rpm/dixon.repo" <<EOF
|
||||
[dixon]
|
||||
name=repo.dixon.cx
|
||||
baseurl=https://repo.dixon.cx/rpm
|
||||
enabled=1
|
||||
gpgcheck=1
|
||||
repo_gpgcheck=1
|
||||
gpgkey=https://repo.dixon.cx/dixon.asc
|
||||
EOF
|
||||
|
||||
# pacman: one directory per architecture, each package signed, then
|
||||
# repo-add (from an Arch container) and a signed database.
|
||||
added=
|
||||
for pkg in "$WORK"/out/*.pkg.tar.zst; do
|
||||
a=$(basename "$pkg" .pkg.tar.zst)
|
||||
a=${a##*-}
|
||||
mkdir -p "$REPO_DIR/arch/$a"
|
||||
cp "$pkg" "$REPO_DIR/arch/$a/"
|
||||
sign --detach-sign -o "$REPO_DIR/arch/$a/$(basename "$pkg").sig" "$pkg"
|
||||
added+=" $a"
|
||||
done
|
||||
for a in $(tr ' ' '\n' <<<"$added" | sort -u); do
|
||||
dir=$REPO_DIR/arch/$a
|
||||
# A fresh database of every package here; -p keeps the newest version.
|
||||
rm -f "$dir/$ARCH_REPO".{db,files}{,.tar.gz}{,.sig}
|
||||
docker run --rm --user "$(id -u):$(id -g)" -e HOME=/tmp -v "$dir:/repo" -w /repo archlinux:latest \
|
||||
sh -c "repo-add --quiet --prevent-downgrade $ARCH_REPO.db.tar.gz *.pkg.tar.zst" 2>&1 |
|
||||
{ grep -v "newer version\|^$" >&2 || true; }
|
||||
for db in $ARCH_REPO.db $ARCH_REPO.files; do
|
||||
sign --detach-sign -o "$dir/$db.tar.gz.sig" "$dir/$db.tar.gz"
|
||||
ln -sfn "$db.tar.gz.sig" "$dir/$db.sig"
|
||||
done
|
||||
rm -f "$dir"/*.old "$dir"/*.old.sig
|
||||
done
|
||||
|
||||
say "published $PACKAGE $VERSION: $(cd "$WORK/out" && ls | wc -l) packages"
|
||||
@@ -19,7 +19,8 @@ type SwapDev struct {
|
||||
}
|
||||
|
||||
type Proc struct {
|
||||
PID, UID int
|
||||
PID, PPID, UID int
|
||||
Tree string // tree-view prefix, display only
|
||||
User, Comm, Cmd string
|
||||
Swap, SwapPss, RSS uint64
|
||||
Delta int64 // change in Swap since previous sample
|
||||
@@ -88,6 +89,8 @@ func readProc(pid int) (Proc, bool) {
|
||||
switch k {
|
||||
case "Name":
|
||||
p.Comm = v
|
||||
case "PPid":
|
||||
p.PPID, _ = strconv.Atoi(v)
|
||||
case "Uid":
|
||||
p.UID, _ = strconv.Atoi(strings.Fields(v)[0])
|
||||
case "VmRSS":
|
||||
|
||||
@@ -21,3 +21,28 @@ Swap: 0 kB
|
||||
t.Fatal("parseKV")
|
||||
}
|
||||
}
|
||||
|
||||
func TestTree(t *testing.T) {
|
||||
a := &app{hideZero: true, sys: &Sys{Procs: []Proc{
|
||||
{PID: 1, PPID: 0, Comm: "init"},
|
||||
{PID: 2, PPID: 1, Comm: "a", Swap: 10},
|
||||
{PID: 3, PPID: 2, Comm: "b", Swap: 5},
|
||||
{PID: 4, PPID: 1, Comm: "c"}, // no swap anywhere below: hidden
|
||||
}}, tree: true}
|
||||
a.rebuild()
|
||||
if len(a.rows) != 3 || a.rows[0].PID != 1 || a.rows[1].Tree != "└─ " || a.rows[2].Tree != " └─ " {
|
||||
t.Fatalf("bad tree: %+v", a.rows)
|
||||
}
|
||||
}
|
||||
|
||||
func TestConfig(t *testing.T) {
|
||||
t.Setenv("XDG_CONFIG_HOME", t.TempDir())
|
||||
c := defaults
|
||||
c.Sort, c.Tree, c.Refresh = "RSS", true, 0.5
|
||||
if err := c.save(); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
if got := loadConfig(); got != c {
|
||||
t.Fatalf("round trip: %+v != %+v", got, c)
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user