This patch introduces
-d, --deadline
-T, --sched-runtime
-D, --sched-deadline
-P, --sched-period
command line options. The functionality is available only for Linux with
sched_setattr() [kernel >=3.14]
Signed-off-by: Karel Zak <kzak@redhat.com>
Transform some of them into copyright lines.
Also fix three header lines and snip some trailing whitespace.
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
This adds a concise description of a tool to its usage text.
A first form of this patch was proposed by Steven Honeyman
(see http://www.spinics.net/lists/util-linux-ng/msg09994.html).
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
This makes it match the license of the man pages.
While there, also tweak some other comment lines.
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
Done for ease of translation and maintenance. Also improve the
clarity of some of the descriptions, and of one error message.
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
ioprio_get and ioprio_set system call accept not only process ID but
also process group ID(pgid) and user ID(uid) to specify the target
process(es). However, ionice command accepts only process ID. With
this patch a user can specify the target processes with pgid(-P
option) and uid(-u option).
[kzak@redhat.com: - tiny cleanup in usage()]
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
A user is always allowed to change the CPU affinity of his or her
own processes. CAP_SYS_NICE is only required to change the affinity
of another user's process.
Signed-off-by: Rik van Riel <riel@redhat.com>
Reported-by: Joe Mario <jmario@redhat.com>
And mention in manual that the default is referring to the internal
default of this command, not the Linux system default. Manual page
example also tries to be a little more complete how to use the command.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
The unsuspecting user might use taskset -a mask command. Behavior then
is to exec with no affinity applied at all. Better handled by ignoring
all_tasks if no pid was given.
Signed-off-by: Daniel Stodden <daniel.stodden@gmail.com>
The global variable $(LDADD) is always used if program_LDADD is
not specified. Let's use $LDADD everywhere to avoid exceptions for
people who need to specify global $LDADD.
Signed-off-by: Karel Zak <kzak@redhat.com>
Several horizontal lists are turned to vertical, and sorted to
alphabetical order. Additionally spaces are converted to tabs where
ever possible.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Use dates without the day, use the full month name, put "util-linux" in
the lower left corner, and "User Commands" or "System Administration"
at the top center.
Also improve here and there the one-line program description.
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
This is a preparation patch for chcpu. If a cpu should be added to
a cpu_set where the cpu doesn't fit into the cpu_set this got silently
ignored.
Since the cpu-list is user space provided it should be checked if cpus
are specified that are completely out of range of the system.
In order to do that add a parameter which specifies if cpulist_parse()
should fail if it parses a cpu-list with "impossible" cpus.
The current callers have been converted so they behave like before.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* replace errx() with warnx() for unknown -c class
The right place to check I/O scheduler features is in kernel. We should
not try to be more smart than kernel.
* make the code ready (robust) for unknown sched.classes
* fix -t behavior
old version:
$ ionice -c 4 -t bash
ionice: bad prio class 4
new version:
$ ionice -c 4 -t bash
Reported-by: Voelker, Bernhard" <bernhard.voelker@siemens-enterprise.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
ionice : print the current I/O prio.
ionice COMMAND : exec command with default (best-effort) class
ionice -p PID [...] : return info about the PID(s)
ionice -c CLASS COMMAND : exec command with the class
ionice -c CLASS -p PID [...] : modify PID(s) class
This should be backwardly compatible and also compatible with nice(1)
from coreutils.
Signed-off-by: Karel Zak <kzak@redhat.com>
taskset.c should add these lines:
#include <sched.h> for sched_getaffinity, etc
#include <stddef.h> for size_t
#include <string.h> for memset
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
$ ionice 123
none: prio 4
none: prio 4
It calls ioprio_get(0x1, 0) and ioprio_get(0x1, 123), because the
code does not check it the "-p" options was specified.
The proper command line syntax is:
$ ionice -p 123
and the ioprio_get() should be called only once.
Signed-off-by: Karel Zak <kzak@redhat.com>
* make the code more robust
* follow kernel conventions for variable names
(data = classdata, ioprio = classdata | class)
Signed-off-by: Karel Zak <kzak@redhat.com>
chrt.c:158:16: warning: comparison of integers of different
signs: 'int' and 'unsigned long' [-Wsign-compare]
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
With this option we can operate on all the thread group of a process not just
for changes, but also when obtaining information via sched_getscheduler().
Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Add a new '-a' option to view/modify the CPU affinity for an entire
group of threads belonging to a given PID. We create two new
functions, print_affinity() and do_taskset() for code simplification.
Example:
zeus@jilguero:~/src/util-linux/schedutils$ ./taskset -a -p 01 3142
pid 3142's current affinity mask: 2
pid 3142's new affinity mask: 1
pid 3164's current affinity mask: 2
pid 3164's new affinity mask: 1
pid 854's current affinity mask: 2
pid 854's new affinity mask: 1
[kzak@redhat.com: - clean up
- move variables to struct taskset]
Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Tested-by: Jonathan Gonzalez <zeus@gnu.org>
Signed-off-by: Karel Zak <kzak@redhat.com>
Currently this program works only with the master thread. Add a '-t'
option to propagate changes to the entire group of threads.
Example:
root@offworld:~/projects/util-linux/schedutils# ls /proc/2111/task/
2111 2112 2119 2121 2138 2139 2159 2160
root@offworld:~/projects/util-linux/schedutils# ./chrt -p 2111
pid 2111's current scheduling policy: SCHED_RR
pid 2111's current scheduling priority: 3
root@offworld:~/projects/util-linux/schedutils# ./chrt -t -p 2 2111
root@offworld:~/projects/util-linux/schedutils# ./chrt -p 2112
pid 2112's current scheduling policy: SCHED_RR
pid 2112's current scheduling priority: 2
root@offworld:~/projects/util-linux/schedutils# ./chrt -p 2111
pid 2111's current scheduling policy: SCHED_RR
pid 2111's current scheduling priority: 2
[kzak@redhat.com: - rename -t/--thread to -a/--all-tasks]
Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Signed-off-by: Karel Zak <kzak@redhat.com>
Solaris lacks err, errx, warn and warnx. This also means the err.h header
doesn't exist. Removed err.h include from all files, and included err.h from
c.h instead if it exists, otherwise alternatives are provided.
Signed-off-by: Fabian Groffen <grobian@gentoo.org>
This patch replaces a few functions used throughout the source:
* Renames getnum (from schedutils) to strtol_or_err
* Moves strtosize (from lib/strtosize.c)
* Moves xstrncpy (from include/xstrncpy.h)
* Adds strnlen, strnchr and strndup if not available (remove it from libmount utils)
A few Makefile.am files were modified to compile accordingly along with trivial renaming
in schedutils source code.
Signed-off-by: Davidlohr Bueso <dave@gnu.org>
In several languages the translations for "current" and "new" will
have to be slightly different depending on whether they apply to
"policy" or "priority". (As a general rule, translatable messages
should be full sentences, and not partial ones with optional words
filled in via %s.)
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
Signed-off-by: Karel Zak <kzak@redhat.com>
The glibc already supports dynamically allocated CPU sets. We don't
have to maintains our private non-compatible implementation.
Signed-off-by: Karel Zak <kzak@redhat.com>
Previously ionice would reply like this when it couldn't find the
command to execute:
$ ionice -c 3 does-not-exist
ionice: execvp failed: No such file or directory
Getting that message from cron because you haven't set the right $PATH
makes it hard to track down the problem. Now it says:
$ ionice -c 3 does-not-exist
ionice: executing does-not-exist failed: No such file or directory
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
This new option allows to set SCHED_RESET_ON_FORK flag for FIFO and RR
policies.
Example:
$ chrt --fifo --reset-on-fork 1 /bin/bash
$ schedutils/chrt --pid $$
pid 31579's current scheduling policy: SCHED_FIFO|SCHED_RESET_ON_FORK
pid 31579's current scheduling priority: 1
Signed-off-by: Karel Zak <kzak@redhat.com>
From 9262c9832134f8a33ac2ea2854dc6d20acc712d1 Mon Sep 17 00:00:00 2001
From: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Date: Tue, 2 Feb 2010 16:57:23 +0100
Subject: [PATCH] Add support for SCHED_RESET_ON_FORK to chrt
SCHED_RESET_ON_FORK has been added in 2.6.31. If a thread has this flag
set, chrt reports "unknown" policy, which is confusing.
The patch adds support for this new flag. It will (can) only be applied
to SCHED_FIFO or SCHED_RR, so there's no need to catch the other
scheduling policies.
Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Karel Zak
Benno Schulenberg
J William Piggott
Sami Kerola
Masatake YAMATO
Michael Bunk
Rik van Riel
Daniel Stodden
Yuri Chornoivan
Heiko Carstens
Davidlohr Bueso
Fabian Groffen
Marek Polacek
Samuel Thibault
Ævar Arnfjörð Bjarmason
Pierre Hauweele
Adrian Knoth