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From: | Aleksandar Markovic |
Subject: | Re: [PATCH 0/4] target/ppc: Use probe_access |
Date: | Thu, 30 Jan 2020 02:35:22 +0100 |
00:51 Čet, 30.01.2020. Richard Henderson <address@hidden> је написао/ла:
>
> The first two address the performance regression noticed
> by Howard Spoelstra. The last two are just something I
> noticed at the same time.
>
But, performance regression, according to Howard bisect analysis, happened because of the change in target-independant code, and the fix presented here is in target-specific code. This defies basic logic and deserves clear and detailed explanation.
My additional concern, of course, is: Are other targets exposed to performance degradation, and why?
Thanks,
Aleksandar
>
> r~
>
>
> Richard Henderson (4):
> target/ppc: Use probe_access for LSW, STSW
> target/ppc: Use probe_access for LMW, STMW
> target/ppc: Remove redundant mask in DCBZ
> target/ppc: Use probe_write for DCBZ
>
> target/ppc/mem_helper.c | 197 +++++++++++++++++++++++++++++++++-------
> 1 file changed, 162 insertions(+), 35 deletions(-)
>
> --
> 2.20.1
>
>
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