On 7/4/19 6:04 PM, Parth Shah wrote:
Same experiment with hackbench and with perf analysis shows increase in L1
cache miss rate with these patches
(Lower is better)
Baseline(%) Patch(%)
--- - ---
Total Cache miss rate
On 7/2/19 2:07 AM, Subhra Mazumdar wrote:
>
Also, systems like POWER9 has sd_llc as a pair of core only. So it
won't benefit from the limits and hence also hiding your code in
select_idle_cpu
behind static keys will be much preferred.
>>> If it doesn't hurt then I don't
Also, systems like POWER9 has sd_llc as a pair of core only. So it
won't benefit from the limits and hence also hiding your code in select_idle_cpu
behind static keys will be much preferred.
If it doesn't hurt then I don't see the point.
So these is the result from POWER9 system with your
On 6/29/19 3:59 AM, Subhra Mazumdar wrote:
>
> On 6/28/19 12:01 PM, Parth Shah wrote:
>>
>> On 6/27/19 6:59 AM, subhra mazumdar wrote:
>>> Use SIS_CORE to disable idle core search. For some workloads
>>> select_idle_core becomes a scalability bottleneck, removing it improves
>>> throughput.
On 6/28/19 12:01 PM, Parth Shah wrote:
On 6/27/19 6:59 AM, subhra mazumdar wrote:
Use SIS_CORE to disable idle core search. For some workloads
select_idle_core becomes a scalability bottleneck, removing it improves
throughput. Also there are workloads where disabling it can hurt latency,
so
On 6/27/19 6:59 AM, subhra mazumdar wrote:
> Use SIS_CORE to disable idle core search. For some workloads
> select_idle_core becomes a scalability bottleneck, removing it improves
> throughput. Also there are workloads where disabling it can hurt latency,
> so need to have an option.
>
>
Use SIS_CORE to disable idle core search. For some workloads
select_idle_core becomes a scalability bottleneck, removing it improves
throughput. Also there are workloads where disabling it can hurt latency,
so need to have an option.
Signed-off-by: subhra mazumdar
---
kernel/sched/fair.c | 8
Use SIS_CORE to disable idle core search. For some workloads
select_idle_core becomes a scalability bottleneck, removing it improves
throughput. Also there are workloads where disabling it can hurt latency,
so need to have an option.
Signed-off-by: subhra mazumdar
---
kernel/sched/fair.c | 8
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