From: Christian Loehle Date: Tue, 13 Aug 2024 14:43:45 +0000 (+0100) Subject: sched/deadline: Convert schedtool example to chrt X-Git-Tag: v6.12-rc1~120^2~3 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8bee4ca5bd64afa6a08c40db621d3c6336685bcf;p=thirdparty%2Flinux.git 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 Signed-off-by: Peter Zijlstra (Intel) Acked-by: Juri Lelli Acked-by: Rafael J. Wysocki Link: https://lore.kernel.org/r/20240813144348.1180344-2-christian.loehle@arm.com --- diff --git a/Documentation/scheduler/sched-deadline.rst b/Documentation/scheduler/sched-deadline.rst index 9fe4846079bbe..22838ed8e13aa 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 (`/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() ==========================