Re: RFR: 8292591: Experimentally add back barrier-less Java thread transitions [v4]

2022-09-09 Thread Robbin Ehn
On Fri, 9 Sep 2022 09:55:46 GMT, Martin Doerr wrote: > Thanks for the update! LGTM. I hope that no other platform with older linux > kernel is still needed. Yes, thanks! > src/hotspot/os/linux/systemMemoryBarrier_linux.cpp line 83: > >> 81: >> 82: void LinuxSystemMemoryBarrier::emit() { >> 8

Re: RFR: 8292591: Experimentally add back barrier-less Java thread transitions [v4]

2022-09-09 Thread Martin Doerr
On Fri, 9 Sep 2022 07:27:43 GMT, Robbin Ehn wrote: >> Please consider, only implemented on x64/aarch64 linux/windows. >> (@TheRealMDoerr have now contributed PPC64) >> >> On my box calling clock_gettime via JNI goes from 35ns to 28ns when enabled. >> >> Passes t1-7 with option forced on, also

Re: RFR: 8292591: Experimentally add back barrier-less Java thread transitions [v4]

2022-09-09 Thread Robbin Ehn
> Please consider, only implemented on x64/aarch64 linux/windows. > (@TheRealMDoerr have now contributed PPC64) > > On my box calling clock_gettime via JNI goes from 35ns to 28ns when enabled. > > Passes t1-7 with option forced on, also passes t1-4 as is in this PR. Robbin Ehn has updated the p