hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

sched: scale sysctl_sched_shares_ratelimit with nr_cpus 

David reported that his Niagra spend a little too much time in
tg_shares_up(), which considering he has a large cpu count makes sense.

So scale the ratelimit value with the number of cpus like we do for
other controls as well.

Reported-by: David Miller <davem@davemloft.net>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2008-08-04 08:54:26 +02:00 committed by Ingo Molnar
parent f1679d0848
commit 55cd53404c
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
kernel/sched.c
View File

@ -808,9 +808,9 @@ const_debug unsigned int sysctl_sched_nr_migrate = 32;
/* /*
* ratelimit for updating the group shares. * ratelimit for updating the group shares.
* default: 0.5ms * default: 0.25ms
*/ */
const_debug unsigned int sysctl_sched_shares_ratelimit = 500000; unsigned int sysctl_sched_shares_ratelimit = 250000;
/* /*
* period over which we measure -rt task cpu usage in us. * period over which we measure -rt task cpu usage in us.
@ -5740,6 +5740,8 @@ static inline void sched_init_granularity(void)
sysctl_sched_latency = limit; sysctl_sched_latency = limit;
sysctl_sched_wakeup_granularity *= factor; sysctl_sched_wakeup_granularity *= factor;
sysctl_sched_shares_ratelimit *= factor;
} }
#ifdef CONFIG_SMP #ifdef CONFIG_SMP