Re: [tbench regression fixes]: digging out smelly deadmen.

Paolo Ciarrocchi
2008-11-01T12:51:52Z

On Wed, Oct 29, 2008 at 10:50 AM, Evgeniy Polyakov <zbr@ioremap.net> wrote:
> On Wed, Oct 29, 2008 at 12:14:05PM +0300, Evgeniy Polyakov (zbr@ioremap.net) wrote:
>> vanilla 27 : 347.222
>> no TSO/GSO : 357.331
>> no hrticks : 382.983
>> no balance : 389.802
>> 4403b4 commit : 361.184
>> dirty_ratio-50 : 361.086
>> no-sched-tweaks : 361.367
>>
>> So, probably, if we revert -tip merge to vanilla .27, add nohrtick patch
>> and nobalance tweak _only_, and apply naive TSO patch we could bring
>> system to 400 MB/s. Note, that .22 has 479.82 and .23 454.36 MB/s.
>
> And now I have to admit that the very last -top merge did noticebly
> improve the situation upto 391.331 MB/s (189 in domains, with tso/gso
> off and naive tcp_tso_should_defer() hange).
>
> So we are now essentially at the level of 24-25 trees in my tests.

That's good and make think whether it would be a good idea to add some
performance number in each pull request that affect the core part of
the kernel.

Ciao,
--
Paolo