linux-kernel - Re: [PATCH v5] perf stat: Fix wrong skipping for per-die aggregation

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Date:   Thu, 14 Jan 2021 09:10:09 +0800
From:   "Jin, Yao" <yao.jin@...ux.intel.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v5] perf stat: Fix wrong skipping for per-die aggregation



On 1/13/2021 7:07 PM, Jiri Olsa wrote:
> On Wed, Jan 13, 2021 at 09:56:31AM +0800, Jin Yao wrote:
> 
> SNIP
> 
>>
>> root@...-csl-2ap4 ~# ./perf stat -a -I 1000 -e llc_misses.mem_read --per-die -- sleep 5
>>       1.001586691 S0-D0           1            1229440 Bytes llc_misses.mem_read
>>       1.001586691 S0-D1           1             976832 Bytes llc_misses.mem_read
>>       1.001586691 S1-D0           1             938304 Bytes llc_misses.mem_read
>>       1.001586691 S1-D1           1            1227328 Bytes llc_misses.mem_read
>>       2.003776312 S0-D0           1            1586752 Bytes llc_misses.mem_read
>>       2.003776312 S0-D1           1             875392 Bytes llc_misses.mem_read
>>       2.003776312 S1-D0           1             855616 Bytes llc_misses.mem_read
>>       2.003776312 S1-D1           1             949376 Bytes llc_misses.mem_read
>>       3.006512788 S0-D0           1            1338880 Bytes llc_misses.mem_read
>>       3.006512788 S0-D1           1             920064 Bytes llc_misses.mem_read
>>       3.006512788 S1-D0           1             877184 Bytes llc_misses.mem_read
>>       3.006512788 S1-D1           1            1020736 Bytes llc_misses.mem_read
>>       4.008895291 S0-D0           1             926592 Bytes llc_misses.mem_read
>>       4.008895291 S0-D1           1             906368 Bytes llc_misses.mem_read
>>       4.008895291 S1-D0           1             892224 Bytes llc_misses.mem_read
>>       4.008895291 S1-D1           1             987712 Bytes llc_misses.mem_read
>>       5.001590993 S0-D0           1             962624 Bytes llc_misses.mem_read
>>       5.001590993 S0-D1           1             912512 Bytes llc_misses.mem_read
>>       5.001590993 S1-D0           1             891200 Bytes llc_misses.mem_read
>>       5.001590993 S1-D1           1             978432 Bytes llc_misses.mem_read
>>
>> On no-die system, die_id is 0, actually it's hashmap(socket,0), original behavior
>> is not changed.
>>
>> Reported-by: Huang Ying <ying.huang@...el.com>
>> Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
>> ---
>> v5:
>>   Hash key is changed to die_id << 32 | socket.
>>   In pkg_id_hash, return (int64_t)key & 0xffffffff; actually it's socket.
> 
> seems ok, but I'm getting python test fail:
> 
> 	$ sudo ./perf test python -v
> 	19: 'import perf' in python                                         :
> 	--- start ---
> 	test child forked, pid 1352066
> 	python usage test: "echo "import sys ; sys.path.append('python'); import perf" | '/usr/bin/python2' "
> 	Traceback (most recent call last):
> 	  File "<stdin>", line 1, in <module>
> 	ImportError: python/perf.so: undefined symbol: hashmap__free
> 	test child finished with -1
> 	---- end ----
> 	'import perf' in python: FAILED!
> 
> jirka
> 

Seems I need to add hashmap.c to python-ext-sources. It surprised me that it was not in it yet. :(

diff --git a/tools/perf/util/python-ext-sources b/tools/perf/util/python-ext-sources
index a9d9c142eb7c..266874913dbb 100644
--- a/tools/perf/util/python-ext-sources
+++ b/tools/perf/util/python-ext-sources
@@ -35,3 +35,4 @@ util/symbol_fprintf.c
  util/units.c
  util/affinity.c
  util/rwsem.c
+util/hashmap.c

root@...-ppc:~# ./perf test 19
19: 'import perf' in python                                         : Ok

Thanks
Jin Yao