Messages in this thread | | | Subject | Re: [PATCH v3 00/10] Rework REFCOUNT_FULL using atomic_fetch_* operations | From | Hanjun Guo <> | Date | Wed, 9 Oct 2019 18:01:00 +0800 |
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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/20190802101000.12958-1-will@kernel.org > v2: https://lkml.kernel.org/r/20190827163204.29903-1-will@kernel.org > > 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 <keescook@chromium.org> > Cc: Ingo Molnar <mingo@kernel.org> > Cc: Elena Reshetova <elena.reshetova@intel.com> > Cc: Peter Zijlstra <peterz@infradead.org> > Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> > Cc: Hanjun Guo <guohanjun@huawei.com> > Cc: Jan Glauber <jglauber@marvell.com> >
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 <guohanjun@huawei.com>
Thanks Hanjun
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