Skip to main content

Browse the archive

https://github.com/torvalds/linux
27 March 2024, 02:37:15 UTC
Revision 33636732dcd7cc738a5913bb730d663c6b03c8fb authored by Kan Liang on 12 January 2015, 17:42:21 UTC, committed by Ingo Molnar on 16 January 2015, 08:06:59 UTC 
perf/x86/intel: Fix bug for "cycles:p" and "cycles:pp" on SLM
 
cycles:p and cycles:pp do not work on SLM since commit:

   86a04461a99f ("perf/x86: Revamp PEBS event selection")

UOPS_RETIRED.ALL is not a PEBS capable event, so it should not be used
to count cycle number.

Actually SLM calls intel_pebs_aliases_core2() which uses INST_RETIRED.ANY_P
to count the number of cycles. It's a PEBS capable event. But inv and
cmask must be set to count cycles.

Considering SLM allows all events as PEBS with no flags, only
INST_RETIRED.ANY_P, inv=1, cmask=16 needs to handled specially.

Signed-off-by: Kan Liang <kan.liang@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1421084541-31639-1-git-send-email-kan.liang@intel.com
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
1 parent 433678b
History
Tip revision: 33636732dcd7cc738a5913bb730d663c6b03c8fb authored by Kan Liang on 12 January 2015, 17:42:21 UTC
perf/x86/intel: Fix bug for "cycles:p" and "cycles:pp" on SLM
Tip revision: 3363673
File Mode Size
Documentation
arch
block
crypto
drivers
firmware
fs
include
init
ipc
kernel
lib
mm
net
samples
scripts
security
sound
tools
usr
virt
.gitignore -rw-r--r-- 1.1 KB
.mailmap -rw-r--r-- 4.8 KB
COPYING -rw-r--r-- 18.3 KB
CREDITS -rw-r--r-- 94.0 KB
Kbuild -rw-r--r-- 2.5 KB
Kconfig -rw-r--r-- 252 bytes
MAINTAINERS -rw-r--r-- 291.9 KB
Makefile -rw-r--r-- 53.1 KB
README -rw-r--r-- 18.3 KB
REPORTING-BUGS -rw-r--r-- 7.3 KB

README

back to top