On 2019/10/7 23:46, Will Deacon wrote: > Hi all, > > This is version three of the patches I previously posted here: > > v1: https://lkml.kernel.org/r/[email protected] > v2: https://lkml.kernel.org/r/[email protected] > > Changes since v2 include: > > - Remove the x86 assembly version and enable this code unconditionally > - Move saturation warnings out-of-line to reduce image bloat > > Cheers, > > Will > > Cc: Kees Cook <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: Elena Reshetova <[email protected]> > Cc: Peter Zijlstra <[email protected]> > Cc: Ard Biesheuvel <[email protected]> > Cc: Hanjun Guo <[email protected]> > Cc: Jan Glauber <[email protected]> >
I tested on top of 5.4-rc2 (with Jan's open-read-close file test case), on a 96 CPU cores ARM64 server, I can see no much difference under 24 cores (each 24 core is a NUMA node), but +5.9% performance improve on 48 cores and +8.4% for 96 cores. For the ARM64 arch, Tested-by: Hanjun Guo <[email protected]> Thanks Hanjun
