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028d455b12
linux/tools/perf
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David Ahern 028d455b12 perf record: Fix fallback to cpu-clock on ppc 
perf-record on PPC is not falling back to cpu-clock:

$ perf record -ag -fo /tmp/perf.data -- sleep 1

  Error: sys_perf_event_open() syscall returned with 6 (No such device or address).  /bin/dmesg may provide additional information.

  Fatal: No CONFIG_PERF_EVENTS=y kernel support configured?

The problem is that until 2.6.37 (behavior changed with commit b0a873e)
perf on PPC returns ENXIO when hw_perf_event_init() fails. With this
patch we get the expected behavior:

$ perf record -ag -fo /tmp/perf.data -v -- sleep 1
Old kernel, cannot exclude guest or host samples.
The cycles event is not supported, trying to fall back to cpu-clock-ticks
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.151 MB /tmp/perf.data (~6592 samples) ]

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1336490937-57106-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2012-05-09 11:57:29 -03:00
..
arch perf tools: Use scnprintf where applicable 2012-03-14 12:36:19 -03:00
bench perf tool: Fix perf stack to non executable on x86_64 2012-02-06 19:14:17 -02:00
config perf report: Add a simple GTK2-based 'perf report' browser 2012-03-19 15:13:29 -03:00
Documentation perf annotate: Allow printing objdump line addr in different color 2012-04-07 16:09:05 -03:00
python perf python: Use attr.watermark in twatch.py 2012-01-30 18:38:23 -02:00
scripts perf script: Add drop monitor script 2011-09-29 16:41:37 -03:00
ui perf ui: Change fallback policy of setup_browser() 2012-05-02 16:17:37 -03:00
util perf target: Consolidate target task/cpu checking 2012-05-07 17:52:05 -03:00
.gitignore perf tools: Ignore auto-generated bison/flex files 2012-04-11 11:41:27 -03:00
builtin-annotate.c perf annotate: Get rid of field_sep check 2012-01-08 13:29:34 -02:00
builtin-bench.c perf bench: Also allow measuring memset() 2012-01-24 20:25:32 -02:00
builtin-buildid-cache.c perf buildid: add perfconfig option to specify buildid cache dir 2010-06-05 09:34:04 -03:00
builtin-buildid-list.c perf report: Accept fifos as input file 2011-12-23 17:01:03 -02:00
builtin-diff.c perf diff: Fix to work with new hists design 2012-03-22 15:12:09 -03:00
builtin-evlist.c perf report: Accept fifos as input file 2011-12-23 17:01:03 -02:00
builtin-help.c perf options: Type check all the remaining OPT_ variants 2010-05-17 16:22:41 -03:00
builtin-inject.c perf tools: Rename perf_event_ops to perf_tool 2011-11-28 10:39:28 -02:00
builtin-kmem.c perf kmem: Fix a memory leak 2012-01-08 13:27:54 -02:00
builtin-kvm.c perf kvm: Do guest-only counting by default 2012-01-06 15:47:37 -02:00
builtin-list.c perf list: Allow filtering list of events 2011-02-17 15:38:58 -02:00
builtin-lock.c perf lock: Document lock info subcommand 2012-01-30 18:30:48 -02:00
builtin-probe.c perf probe: Rename target_module to target 2012-02-02 17:39:15 -02:00
builtin-record.c perf record: Fix fallback to cpu-clock on ppc 2012-05-09 11:57:29 -03:00
builtin-report.c perf report: Fix format string for x86-32 compilation 2012-05-09 11:27:08 -03:00
builtin-sched.c perf tools: Fix getrusage() related build failure on glibc trunk 2012-04-04 11:59:00 +02:00
builtin-script.c perf script: Add option resolving vmlinux path 2012-01-30 18:13:07 -02:00
builtin-stat.c perf stat: Use perf_evlist__create_maps 2012-05-07 17:52:22 -03:00
builtin-test.c perf evlist: Make create_maps() take struct perf_target 2012-05-02 15:23:11 -03:00
builtin-timechart.c perf report: Accept fifos as input file 2011-12-23 17:01:03 -02:00
builtin-top.c perf top: Default to system wide using perf_target methods 2012-05-08 10:47:09 -03:00
builtin.h perf tools: Make perf.data more self-descriptive (v8) 2011-10-07 17:01:24 -03:00
command-list.txt perf evlist: New command to list the names of events present in a perf.data file 2011-03-15 11:10:48 -03:00
CREDITS
design.txt perf: Fix few typos + cosmetics 2010-01-13 17:39:44 +01:00
Makefile perf ui: Add gtk2 support into setup_browser() 2012-05-02 16:17:34 -03:00
MANIFEST perf tools: Fix out of tree compiles 2012-02-13 22:46:41 -02:00
perf-archive.sh perf buildid: add perfconfig option to specify buildid cache dir 2010-06-05 09:34:04 -03:00
perf.c perf tools: Simplify debugfs mountpoint handling code 2011-11-28 10:11:28 -02:00
perf.h perf target: Split out perf_target handling code 2012-05-02 15:41:11 -03:00