On 04/21/2012 09:01 AM, Takuya Yoshikawa wrote: > Sorry for the delay. > > On Wed, 18 Apr 2012 12:01:03 +0800 > Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxxxxxx> wrote: > >>> I have checked dirty-log-perf myself with this patch [01-07]. >>> >>> GET_DIRTY_LOG for 1GB dirty pages has become more than 15% slower. > >> Thanks for your test! >> >> Unbelievable, i will do more test and check it more carefully. > > GET_DIRTY_LOG now traverses rmap lists intensively. > So only a small change can affect the performance when there are many > dirty pages. > >> Could you please open your tool, then i can reproduction it and find the >> real reason? > > It's already in kvm unit tests! > Great, i will check that. >> I will check whether your tool is better then kernbench/autotest after >> review your tool. > > Let's focus on "lock-less" now: so dirty-log-perf is not needed now. > > I think you failed to appeal the real advantage of your "lock-less" approach! > I will write about this on v3-threads. Thank you very much, Takuya! -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
