Messages in this thread | | | From | KOSAKI Motohiro <> | Subject | Re: [PATCH 0/4] Reclaim page capture v4 | Date | Fri, 3 Oct 2008 15:48:28 +0900 (JST) |
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> Hi, Andy. > > I tested your patch in my desktop. > The test is just kernel compile with single thread. > My system environment is as follows. > > model name : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz > MemTotal: 2065856 kB > > When I tested vanilla, compile time is as follows. > > 2433.53user 187.96system 42:05.99elapsed 103%CPU (0avgtext+0avgdata > 0maxresident)k > 588752inputs+4503408outputs (127major+55456246minor)pagefaults 0swaps > > When I tested your patch, as follows. > > 2489.63user 202.41system 44:47.71elapsed 100%CPU (0avgtext+0avgdata > 0maxresident)k > 538608inputs+4503928outputs (130major+55531561minor)pagefaults 0swaps > > Regresstion almost is above 2 minutes. > Do you think It is a trivial?
Ooops. this is definitly significant regression.
> I know your patch is good to allocate hugepage. > But, I think many users don't need it, including embedded system and > desktop users yet. > > So I suggest you made it enable optionally.
No. if the patch has this significant regression, nobody turn on its option.
We should fix that.
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