lkml.org 
[lkml]   [2022]   [Jan]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v3 1/2] perf test: Workload test of metric and metricgroups
From
Date
On 24/09/2021 20:09, Arnaldo Carvalho de Melo wrote:
> Em Fri, Sep 17, 2021 at 11:42:39AM -0700, Ian Rogers escreveu:
>> Test every metric and metricgroup with 'true' as a workload. For
>> metrics, check that we see the metric printed or get unsupported. If the
>> 'true' workload executes too quickly retry with 'perf bench internals
>> synthesize'.
>>
>> v3. Fix test condition (thanks to Paul A. Clarke<pc@us.ibm.com>). Add a
>> fallback case of a larger workload so that we don't ignore "<not
>> counted>".
>> v2. Switched the workload to something faster.

Hi Ian,

I just noticed that this test fails on my broadwell machine.

I am using acme perf/core @ 09dd3c22daaf

metricgroup Memory_Bw fails, and it seems because of the "true" argument
to "perf stat" (or any argument, like sleep 1):

john@localhost:~/kernel-dev9/tools/perf> sudo ./perf stat -M Memory_BW
^C
Performance counter stats for 'system wide':

2,184 arb/event=0x84,umask=0x1/ # 0.26
DRAM_BW_Use
2,954,938 arb/event=0x81,umask=0x1/

736,368,852 ns duration_time

58,202,980 l1d_pend_miss.pending_cycles # 2.34 MLP
(80.11%)
136,293,194 l1d_pend_miss.pending
(19.89%)
736,368,852 ns duration_time

1,065,656 longest_lat_cache.miss # 0.09
L3_Cache_Fill_BW (39.71%)
736,368,852 ns duration_time

5,365,477 l2_lines_in.all # 0.47
L2_Cache_Fill_BW (59.80%)
736,368,852 ns duration_time

3,557,362 l1d.replacement # 0.31
L1D_Cache_Fill_BW (79.90%)
736,368,852 ns duration_time


0.736368852 seconds time elapsed


john@localhost:~/kernel-dev9/tools/perf> sudo ./perf stat -M Memory_BW true
Error:
The sys_perf_event_open() syscall returned with 22 (Invalid argument)
for event (arb/event=0x84,umask=0x1/).
/bin/dmesg | grep -i perf may provide additional information.

john@localhost:~/kernel-dev9/tools/perf>

Anyone any idea on this before I start digging?

Thanks,
John

\
 
 \ /
  Last update: 2022-01-12 13:26    [W:0.095 / U:0.208 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site