Messages in this thread | | | Date | Mon, 30 Sep 2013 12:14:03 +0400 | From | Vladimir Davydov <> | Subject | Re: [tip:sched/core] sched/balancing: Fix cfs_rq-> task_h_load calculation |
| |
On 09/29/2013 01:47 PM, Yuanhan Liu wrote: > On Fri, Sep 20, 2013 at 06:46:59AM -0700, tip-bot for Vladimir Davydov wrote: >> Commit-ID: 7e3115ef5149fc502e3a2e80719dba54a8e7409d >> Gitweb:http://git.kernel.org/tip/7e3115ef5149fc502e3a2e80719dba54a8e7409d >> Author: Vladimir Davydov<vdavydov@parallels.com> >> AuthorDate: Sat, 14 Sep 2013 19:39:46 +0400 >> Committer: Ingo Molnar<mingo@kernel.org> >> CommitDate: Fri, 20 Sep 2013 11:59:39 +0200 >> >> sched/balancing: Fix cfs_rq->task_h_load calculation >> >> Patch a003a2 (sched: Consider runnable load average in move_tasks()) >> sets all top-level cfs_rqs' h_load to rq->avg.load_avg_contrib, which is >> always 0. This mistype leads to all tasks having weight 0 when load >> balancing in a cpu-cgroup enabled setup. There obviously should be sum >> of weights of all runnable tasks there instead. Fix it. > Hi Vladimir, > > FYI, Here we found a 17% netperf regression by this patch. Here are some > changed stats between this commit 7e3115ef5149fc502e3a2e80719dba54a8e7409d > and it's parent(3029ede39373c368f402a76896600d85a4f7121b)
Hello,
Could you please report the following info:
1) the test machine cpu topology (i.e. output of /sys/devices/system/cpu/cpu*/{thread_siblings_list,core_siblings_list}) 2) kernel config you used during the test 3) the output of /sys/kernel/debug/sched_features (debugfs mounted). 4) netperf server/client options 5) did you place netserver into a separate cpu cgroup?
Thanks.
| |