Messages in this thread | | | From | Kees Cook <> | Subject | Re: [PATCH v2] seccomp: Improve performace by optimizing rmb() | Date | Wed, 10 Feb 2021 12:44:07 -0800 |
| |
On Fri, 5 Feb 2021 11:34:09 +0800, wanghongzhe wrote: > According to kees's suggest, we started with the patch that just replaces > rmb() with smp_rmb() and did a performace test with UnixBench. The results > showed the overhead about 2.53% in rmb() test compared to the smp_rmb() > one, in a x86-64 kernel with CONFIG_SMP enabled running inside a qemu-kvm > vm. The test is a "syscall" testcase in UnixBench, which executes 5 > syscalls in a loop during a certain timeout (100 second in our test) and > counts the total number of executions of this 5-syscall sequence. We set a > seccomp filter with all allow rule for all used syscalls in this test > (which will go bitmap path) to make sure the rmb() will be executed. The > details for the test: > > [...]
Applied to for-next/seccomp, thanks!
[1/1] seccomp: Improve performace by optimizing rmb() https://git.kernel.org/kees/c/a381b70a1cf8
-- Kees Cook
| |