From: Thomas-Mich Richter <tmricht@linux.vnet.ibm.com>
To: linux-perf-users@vger.kernel.org
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Subject: perf tool: perf mem not working on s390x
Date: Fri, 23 Jun 2017 09:28:53 +0200 [thread overview]
Message-ID: <4ad64b13-5ed4-a8f0-9a3a-2748663bb5a2@linux.vnet.ibm.com> (raw)
When I run perf mem ... it fails with
[root@s8360046 perf]# ./perf mem record -- sleep 1
failed: memory events not supported
[root@s8360046 perf]
That is currently not working on s390.
When I look into the code, the perf mem command is looking for sysfs files in
-r--r--r-- 1 root root 4096 Jun 9 11:02 /sys/devices/cpu/events/mem-loads
-r--r--r-- 1 root root 4096 Jun 9 11:02 /sys/devices/cpu/events/mem-stores
Those 2 sysfs files do not exist on a s390. In fact there is a different
subdirectory tree.
I am not sure how this is handled on the s390 at all. I would have expected
perf mem to somehow retrieve the event numbers and then feed perf record
with these event numbers.
Any comments/ideas on how to handle this?
--
Thomas Richter, Dept 3303, IBM LTC Boeblingen Germany
--
Vorsitzende des Aufsichtsrats: Martina Koederitz
Geschäftsführung: Dirk Wittkopp
Sitz der Gesellschaft: Böblingen / Registergericht: Amtsgericht Stuttgart, HRB 243294
next reply other threads:[~2017-06-23 7:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-23 7:28 Thomas-Mich Richter [this message]
2017-06-23 18:33 ` perf tool: perf mem not working on s390x Arnaldo Carvalho de Melo
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