Hi Yingshiuan,
That's fine. Do we have updated patch for memcpy? Did you get the
Quadrant/Geekbench3 data in your side? Thanks.
Regards
Yin, Fengwei
On 2015年07月06日 09:24, Yingshiuan Pan wrote:
Hi Fengwei
Sorry, my carelessness, you're right.
--
潘穎軒 Yingshiuan (Peter) Pan
2015-07-03 19:51 GMT+08:00 yfw <fengwei.yin@linaro.org
<mailto:fengwei.yin@linaro.org>>:
Hi Yingshiuan,
https://android-review.googlesource.com/#/c/147915/ is for memchr.
while
http://review.android.git.linaro.org/#/c/15529/ is for memcpy. Could you
please double check whether you have correct link? Thanks.
Regards
Yin, Fengwei
在 2015/7/3 14:04, Yingshiuan Pan 写道:
Hi Fengwei,
Thanks for the report, there is a new revision here:
https://android-review.googlesource.com/#/c/147915/
Although only single instruction is changed, someone said he did see
measurable improvement.
Would you give a try? I'll also run those benchmarks to see if I can
reproduce the result.
btw, what is the platform you are using?
--
潘穎軒 Yingshiuan (Peter) Pan
2015-07-03 13:59 GMT+08:00 yfw <fengwei.yin@linaro.org
<mailto:fengwei.yin@linaro.org>
<mailto:fengwei.yin@linaro.org <mailto:fengwei.yin@linaro.org>>>:
From their report, they used:
Quadrant Professional(v2.1.1)
GeekBench3 (v3.3.2)
I suppose the methodology to run these benchmarks is very
known.
Regards
Yin, Fengwei
在 2015/7/3 11:53, Tom Gall 写道:
Hi Fengwei,
Thanks for the report. I think we would be interested in
knowing the
nature of the test being used.
I've added Bero to the CC as I'm sure he'll be
interested as well.
On Thu, Jul 2, 2015 at 9:35 PM, yfw
<fengwei.yin@linaro.org <mailto:fengwei.yin@linaro.org>
<mailto:fengwei.yin@linaro.org<mailto:linaro-android@lists.linaro.org
<mailto:fengwei.yin@linaro.org>>> wrote:
Hi,
About the patch
http://review.android.git.linaro.org/#/c/15529/, we got
an issue report from member. It could improve the micro
benchmark but
hurt general benchmark actually. Here is their test
result:
bionic-benchmarks32 BM_string_memcpy:
Size AOSP Linaro Perf Improvement
8 450.7 329.5 -37%
64 1715.7 2225.3 23%
512 3100.7 4253.0 27%
1K 3271.8 4652.3 30%
8K 2460.9 3174.7 22%
16K 2267.4 2953.2 23%
32K 2222.9 2800.7 21%
64K 2204.3 2640.1 17%
without patch with patch
perf delta
Quadrant mem 3400 2100 -38%
GeekBench3
single-core 436 260 -40%
multi-core 434 358 -18%
I am wondering whether this is an known issue or
not for
this list.
Thanks in advance.
Regards
Yin, Fengwei
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