efad14150a
The default input file for perf report is not handled the same way as perf record does it for its output file. This leads to unexpected behavior of perf report, etc. E.g.: # perf record -a -e cpu-cycles sleep 2 | perf report | cat failed to open perf.data: No such file or directory (try 'perf record' first) While perf record writes to a fifo, perf report expects perf.data to be read. This patch changes this to accept fifos as input file. Applies to the following commands: perf annotate perf buildid-list perf evlist perf kmem perf lock perf report perf sched perf script perf timechart Also fixes char const* -> const char* type declaration for filename strings. v2: * Prevent potential null pointer access to input_name in builtin-report.c. Needed due to removal of patch "perf report: Setup browser if stdout is a pipe" Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1323248577-11268-5-git-send-email-robert.richter@amd.com Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
52 lines
967 B
Text
52 lines
967 B
Text
perf-lock(1)
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============
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NAME
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----
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perf-lock - Analyze lock events
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SYNOPSIS
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--------
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[verse]
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'perf lock' {record|report|trace}
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DESCRIPTION
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-----------
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You can analyze various lock behaviours
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and statistics with this 'perf lock' command.
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'perf lock record <command>' records lock events
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between start and end <command>. And this command
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produces the file "perf.data" which contains tracing
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results of lock events.
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'perf lock trace' shows raw lock events.
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'perf lock report' reports statistical data.
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COMMON OPTIONS
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--------------
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-i::
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--input=<file>::
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Input file name. (default: perf.data unless stdin is a fifo)
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-v::
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--verbose::
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Be more verbose (show symbol address, etc).
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-D::
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--dump-raw-trace::
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Dump raw trace in ASCII.
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REPORT OPTIONS
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--------------
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-k::
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--key=<value>::
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Sorting key. Possible values: acquired (default), contended,
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wait_total, wait_max, wait_min.
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SEE ALSO
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--------
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linkperf:perf[1]
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