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
test-lock.tar
Description: Unix tar archive
