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* Scheduler benchmarks
@ 2020-08-18 14:30 Muni Sekhar
  2020-08-18 14:36 ` Greg KH
  0 siblings, 1 reply; 17+ messages in thread
From: Muni Sekhar @ 2020-08-18 14:30 UTC (permalink / raw)
  To: kernelnewbies, linux-kernel, linux-perf-users

Hi all,

I’ve two identical Linux systems with only kernel differences.
While doing kernel profiling with perf, I got the below mentioned
metrics for Scheduler benchmarks.

1st system (older kernel version compared to the other system) benchmark result:

$ perf bench sched messaging -g 64
# Running 'sched/messaging' benchmark:
# 20 sender and receiver processes per group
# 64 groups == 2560 processes run

     Total time: 2.936 [sec]


2nd system benchmark result:

$ perf bench sched messaging -g 64
# Running 'sched/messaging' benchmark:
# 20 sender and receiver processes per group
# 64 groups == 2560 processes run

     Total time: 10.074 [sec]


So as per scheduler benchmark results, clearly a huge difference
between two systems.
Can anyone suggest to me how to dive deeper to know the root cause for
it. Also are there any tunable kernel parameters related to this one?



-- 
Thanks,
Sekhar

^ permalink raw reply	[flat|nested] 17+ messages in thread

end of thread, other threads:[~2021-04-29 21:32 UTC | newest]

Thread overview: 17+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-08-18 14:30 Scheduler benchmarks Muni Sekhar
2020-08-18 14:36 ` Greg KH
2020-08-18 16:01   ` Muni Sekhar
2020-08-18 16:50   ` Muni Sekhar
2020-08-18 16:54   ` Muni Sekhar
2020-08-18 17:14     ` Greg KH
2020-08-18 17:31       ` Muni Sekhar
2020-08-18 17:36         ` Greg KH
2020-08-18 17:53           ` Muni Sekhar
2020-08-18 18:15             ` peter enderborg
2020-08-19 10:16               ` Muni Sekhar
2020-08-19 10:21                 ` Bernd Petrovitsch
2020-08-19 14:36                   ` David Laight
2020-08-19 10:42                 ` Greg KH
2020-08-19 16:43                   ` Valdis Klētnieks
2020-08-19 16:47                     ` Greg KH
2021-04-29 21:32                 ` Arnaldo Carvalho de Melo

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