Re: [RFC][PATCH 5/8] memcg: optimize branches

[KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>]

On Tue, 29 Apr 2008 11:48:32 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:
> extern void *allocalter(int size);
> extern void call(int arg);
> void *foo(void)
> {
>         char *ptr;
>         ptr = allocator(1024);
>         if (unlikely(!ptr)) {
>                 call(1);
>                 call(2);
>         } else {
>                 call(3);
>                 call(4);
>         }
>         return ptr;
> }
> ==
> When I compiled above with -O2 on ia64,
>  - if unlikely is used , call(3),call(4) are on fast path.
>  - if unlikely is not used, call(1), call(3) are on fast path.
                                       call(2)
Sorry, too many typos in these days ...

Thanks,
-Kame

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