Is it acceptable for performance improvement or more comments on this patch?
Thanks Ling 2016-04-05 11:44 GMT+08:00 Ling Ma <[email protected]>: > Hi Longman, > >> with some modest increase in performance. That can be hard to justify. Maybe >> you should find other use cases that involve less changes, but still have >> noticeable performance improvement. That will make it easier to be accepted. > > The attachment is for other use case with the new lock optimization. > It include two files: main.c (user space workload), > fcntl-lock-opt.patch (kernel patch on 4.3.0-rc4 version) > (The hardware platform is on Intel E5 2699 V3, 72 threads (18core *2Socket > *2HT) > > 1. when we run a.out from main.c on original 4.3.0-rc4 version, > the average throughput from a.out is 1887592( 98% cpu cost from perf top -d1) > > 2. when we run a.out from main.c with the fcntl-lock-opt.patch , > the average throughput from a.out is 5277281 (91% cpu cost from perf top -d1) > > So we say the new mechanism give us about 2.79x (5277281 / 1887592) > improvement. > > Appreciate your comments. > > Thanks > Ling
