| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <47F2EC87.30205@cn.fujitsu.com> Date: Wed, 02 Apr 2008 10:16:39 +0800 From: Li Zefan <lizf@...fujitsu.com> To: Andrew Morton <akpm@...ux-foundation.org> CC: Paul Menage <menage@...gle.com>, LKML <linux-kernel@...r.kernel.org>, containers@...ts.linux-foundation.org Subject: [PATCH -mm 0/3] cgroup: use hash table for css_set When we attach a process to a different cgroup, the css_set linked-list will be run through to find a suitable existing css_set to use. This patch set uses a hash table for better performance. As we add the hash table, we can totally remove the css_set linked-list. When we have to run through the linked-list, we can run through the hash table instead. I tested the following benmarks: For N in 1, 5, 10, 50, 100, 500, 1000, create N cgroups with one sleeping task in each, and then move an additional task through each cgroup in turn. Here is a test result: N Loop orig - Time(s) hash - Time(s) ---------------------------------------------- 1 10000 1.201231728 1.196311177 5 2000 1.065743872 1.040566424 10 1000 0.991054735 0.986876440 50 200 0.976554203 0.969608733 100 100 0.998504680 0.969218270 500 20 1.157347764 0.962602963 1000 10 1.619521852 1.085140172 Those patches are based on 2.6.25-rc5-mm1. Regards, Li Zefan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists