|| ||KAMEZAWA Hiroyuki <firstname.lastname@example.org> |
|| ||"email@example.com" <firstname.lastname@example.org> |
|| ||[RFC][PATCH 0/4][mmotm] memcg: reduce lock contention v3 |
|| ||Wed, 9 Sep 2009 17:39:03 +0900|
|| ||"email@example.com" <firstname.lastname@example.org>,
|| ||Article, Thread
This patch series is for reducing memcg's lock contention on res_counter, v3.
(sending today just for reporting current status in my stack.)
It's reported that memcg's res_counter can cause heavy false sharing / lock
conention and scalability is not good. This is for relaxing that.
No terrible bugs are found, I'll maintain/update this until the end of next
merge window. Tests on big-smp and new-good-idea are welcome.
This patch is on to mmotm+Nishimura's fix + Hugh's get_user_pages() patch.
But can be applied directly against mmotm, I think.
I used 8cpu x86-64 box and run make -j 12 kernel.
Before make, make clean and drop_caches.
[Before patch(mmotm)] 3 runs
[After patch] 3 runs.
you can see 'sys' is reduced.
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to email@example.com. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"firstname.lastname@example.org"> email@example.com </a>