diff options
| author | Christian Loehle <christian.loehle@arm.com> | 2024-08-13 15:43:45 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2024-09-11 11:23:56 +0200 |
| commit | 8bee4ca5bd64afa6a08c40db621d3c6336685bcf (patch) | |
| tree | 83e9a6544e6ff9ee99750aaac8665ac57262f335 /Documentation/scheduler | |
| parent | 2cab4bd024d23f658e40dce209dfd012f4e8b19a (diff) | |
| download | lwn-8bee4ca5bd64afa6a08c40db621d3c6336685bcf.tar.gz lwn-8bee4ca5bd64afa6a08c40db621d3c6336685bcf.zip | |
sched/deadline: Convert schedtool example to chrt
chrt has SCHED_DEADLINE support so convert the example instead of
relying on a schedtool fork. While at it fix the wrong mentioning
of microseconds, it was nanoseconds for both schedtool and chrt.
Signed-off-by: Christian Loehle <christian.loehle@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Juri Lelli <juri.lelli@redhat.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Link: https://lore.kernel.org/r/20240813144348.1180344-2-christian.loehle@arm.com
Diffstat (limited to 'Documentation/scheduler')
| -rw-r--r-- | Documentation/scheduler/sched-deadline.rst | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/Documentation/scheduler/sched-deadline.rst b/Documentation/scheduler/sched-deadline.rst index 9fe4846079bb..22838ed8e13a 100644 --- a/Documentation/scheduler/sched-deadline.rst +++ b/Documentation/scheduler/sched-deadline.rst @@ -749,21 +749,19 @@ Appendix A. Test suite of the command line options. Please refer to rt-app documentation for more details (`<rt-app-sources>/doc/*.json`). - The second testing application is a modification of schedtool, called - schedtool-dl, which can be used to setup SCHED_DEADLINE parameters for a - certain pid/application. schedtool-dl is available at: - https://github.com/scheduler-tools/schedtool-dl.git. + The second testing application is done using chrt which has support + for SCHED_DEADLINE. The usage is straightforward:: - # schedtool -E -t 10000000:100000000 -e ./my_cpuhog_app + # chrt -d -T 10000000 -D 100000000 0 ./my_cpuhog_app With this, my_cpuhog_app is put to run inside a SCHED_DEADLINE reservation - of 10ms every 100ms (note that parameters are expressed in microseconds). - You can also use schedtool to create a reservation for an already running + of 10ms every 100ms (note that parameters are expressed in nanoseconds). + You can also use chrt to create a reservation for an already running application, given that you know its pid:: - # schedtool -E -t 10000000:100000000 my_app_pid + # chrt -d -T 10000000 -D 100000000 -p 0 my_app_pid Appendix B. Minimal main() ========================== |