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tools/sched_ext: Add missing -c option in scx_qmap help

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The sub-scheduler api has been added to scx_qmap, but the new -c option is
missing in help, which is hard to understand and use. Add it in help.

V2: add [-c CG_PATH] to the usage synopsis.

Signed-off-by: Zhao Mengmeng <zhaomengmeng@kylinos.cn>
Reviewed-by: Cheng-Yang Chou <yphbchou0911@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Zhao Mengmeng 2026-04-17 17:18:02 +08:00 committed by Tejun Heo
parent 7c7bb206e8
commit 26fb937c7b
1 changed files with 3 additions and 1 deletions
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4
tools/sched_ext/scx_qmap.c
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@ -23,7 +23,8 @@ const char help_fmt[] =
"See the top-level comment in .bpf.c for more details.\n"
"\n"
"Usage: %s [-s SLICE_US] [-e COUNT] [-t COUNT] [-T COUNT] [-l COUNT] [-b COUNT]\n"
" [-N COUNT] [-P] [-M] [-H] [-d PID] [-D LEN] [-S] [-p] [-I] [-F COUNT] [-v]\n"
" [-N COUNT] [-P] [-M] [-H] [-c CG_PATH] [-d PID] [-D LEN] [-S] [-p] [-I]\n"
" [-F COUNT] [-v]\n"
"\n"
" -s SLICE_US Override slice duration\n"
" -e COUNT Trigger scx_bpf_error() after COUNT enqueues\n"
@ -35,6 +36,7 @@ const char help_fmt[] =
" -P Print out DSQ content and event counters to trace_pipe every second\n"
" -M Print out debug messages to trace_pipe\n"
" -H Boost nice -20 tasks in SHARED_DSQ, use with -b\n"
" -c CG_PATH Cgroup path to attach as sub-scheduler, must run parent scheduler first\n"
" -d PID Disallow a process from switching into SCHED_EXT (-1 for self)\n"
" -D LEN Set scx_exit_info.dump buffer length\n"
" -S Suppress qmap-specific debug dump\n"