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Re: [PATCH] aarch64: Add tunable glibc.memset.dc_zva_threshold
On 02/08/19 8:37 AM, Siddhesh Poyarekar wrote:
> On 02/08/19 7:19 AM, Feng Xue OS wrote:
>> For SPEC2017 502.gcc_r (rate=32), which uses quite a few memsets, we can get 2.3%
>> improvement on emag processor if DC ZVA threshold is changed from 512 to 8M.
>
> That's great, can you test for another part too? Making a case for a
> tunable is easier if you can show applicability to a larger set of
> processors.
Oops, I assumed this explanation was for introducing the tunable, I
realize now that it is for the default 8M value on emag. The test is
still desirable to make the case for a tunable stronger, but not for
this specific point :)
Siddhesh