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Re: Tweak ALAP calculation in SCHED_PRESSURE_MODEL
On 11/16/18 10:21 AM, Kyrill Tkachov wrote:
>
>>>> It probably wouldn't be a bad idea to look at the default for
>>>> MAX_PENDING_LIST_LENGTH. Based on the current default value and the
>>>> comments in the code that value could well have been tuned 25 or more
>>>> years ago!
>>> Probably. I see that s390 and spu increase that param in their backends
>>> to much larger values than the default
>>> I played around with increasing it on aarch64. It improved things
>>> somewhat, but Richard's patch still gave superior results.
>> ACK. Thanks for testing. If you want to adjust, that would seem fine
>> as a follow-up.
>
> I'd need to benchmark such a change, but thanks.
>
> MAX_PENDING_LIST_LENGTH only exists to limit compile-time, right?
I believe so.
jeff