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perf sched stats: Fixes in man page

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Fix the incorrect description of the schedstats report. Also fix the
spelling errors in man page.

Fixes: 800af362d6 ("perf sched stats: Add details in man page")
Reviewed-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Reported-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Signed-off-by: Swapnil Sapkal <swapnil.sapkal@amd.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Anubhav Shelat <ashelat@redhat.com>
Cc: Chen Yu <yu.c.chen@intel.com>
Cc: Gautham Shenoy <gautham.shenoy@amd.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Thomas Falcon <thomas.falcon@intel.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Swapnil Sapkal 2026-01-27 18:50:00 +00:00 committed by Arnaldo Carvalho de Melo
parent f7dc496453
commit 34b0a58eef
1 changed files with 4 additions and 4 deletions
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8
tools/perf/Documentation/perf-sched.txt
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@ -86,7 +86,7 @@ There are several variants of 'perf sched':
exposed through the file ``/proc/schedstat``. These counters are enabled or disabled
via the sysctl governed by the file ``/proc/sys/kernel/sched_schedstats``. These
counters accounts for many scheduler events such as ``schedule()`` calls, load-balancing
events, ``try_to_wakeup()`` call among others. This is useful in understading the
events, ``try_to_wakeup()`` call among others. This is useful in understanding the
scheduler behavior for the workload.
Note: The tool will not give correct results if there is topological reordering or
@ -100,7 +100,7 @@ There are several variants of 'perf sched':
A detailed description of the schedstats can be found in the Kernel Documentation:
https://www.kernel.org/doc/html/latest/scheduler/sched-stats.html
The result can be interprested as follows:
The result can be interpreted as follows:
The `perf sched stats report` starts with description of the columns present in
the report. These column names are given before cpu and domain stats to improve
@ -116,7 +116,7 @@ There are several variants of 'perf sched':
Next is the total profiling time in terms of jiffies:
----------------------------------------------------------------------------------------------------
Time elapsed (in jiffies) : 24537
Time elapsed (in jiffies) : 2323
----------------------------------------------------------------------------------------------------
Next is CPU scheduling statistics. These are simple diffs of /proc/schedstat CPU lines
@ -210,7 +210,7 @@ There are several variants of 'perf sched':
While profiling was active, the load-balancer found 28490 times the load
needs to be balanced on a newly idle CPU 0. Following value encapsulated
inside $ is average jiffies between two events (28490 / 24537 = 0.08).
inside $ is average jiffies between two events (2323 / 28490 = 0.08).
Next are active_load_balance() stats. alb did not trigger while the
profiling was active, hence it's all 0s.