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Code Issues Releases Wiki Activity

sched/debug: Increase SCHEDSTAT_VERSION to 16 

We changed the order of definitions within 'enum cpu_idle_type',
which changed the order of [CPU_MAX_IDLE_TYPES] columns in
show_schedstat().

Suggested-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: "Gautham R. Shenoy" <gautham.shenoy@amd.com>
Link: https://lore.kernel.org/r/20240308105901.1096078-5-mingo@kernel.org
This commit is contained in:
Ingo Molnar 2024-03-08 11:58:55 +01:00
parent 38d707c54d
commit 11b0bfa5d4
2 changed files with 6 additions and 1 deletions
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5
Documentation/scheduler/sched-stats.rst
View File

@ -2,6 +2,11 @@
Scheduler Statistics
====================
Version 16 of schedstats changed the order of definitions within
'enum cpu_idle_type', which changed the order of [CPU_MAX_IDLE_TYPES]
columns in show_schedstat(). In particular the position of CPU_IDLE
and __CPU_NOT_IDLE changed places. The size of the array is unchanged.
Version 15 of schedstats dropped counters for some sched_yield:
yld_exp_empty, yld_act_empty and yld_both_empty. Otherwise, it is
identical to version 14.

2
kernel/sched/stats.c
View File

@ -113,7 +113,7 @@ void __update_stats_enqueue_sleeper(struct rq *rq, struct task_struct *p,
* Bump this up when changing the output format or the meaning of an existing
* format, so that tools can adapt (or abort)
*/
#define SCHEDSTAT_VERSION 15
#define SCHEDSTAT_VERSION 16
static int show_schedstat(struct seq_file *seq, void *v)
{