diff options
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-03-06 13:31:21 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-03-06 14:59:50 +0100 |
| commit | 152e9b8676c6e788c6bff095c1eaae7b86df5003 (patch) | |
| tree | 3d72c5031879ff4bcf418a67f315c0a11bbf40ca /arch/s390/kernel/smp.c | |
| parent | 01396a374c3d31bc5f8b693026cfa9a657319624 (diff) | |
| download | linux-152e9b8676c6e788c6bff095c1eaae7b86df5003.tar.gz linux-152e9b8676c6e788c6bff095c1eaae7b86df5003.tar.bz2 linux-152e9b8676c6e788c6bff095c1eaae7b86df5003.zip | |
s390/vtime: steal time exponential moving average
To be able to judge the current overcommitment ratio for a CPU add
a lowcore field with the exponential moving average of the steal time.
The average is updated every tick.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/smp.c')
| -rw-r--r-- | arch/s390/kernel/smp.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index b198ece2aad6..b8eb99685546 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -266,7 +266,8 @@ static void pcpu_prepare_secondary(struct pcpu *pcpu, int cpu) lc->percpu_offset = __per_cpu_offset[cpu]; lc->kernel_asce = S390_lowcore.kernel_asce; lc->machine_flags = S390_lowcore.machine_flags; - lc->user_timer = lc->system_timer = lc->steal_timer = 0; + lc->user_timer = lc->system_timer = + lc->steal_timer = lc->avg_steal_timer = 0; __ctl_store(lc->cregs_save_area, 0, 15); save_access_regs((unsigned int *) lc->access_regs_save_area); memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list, |