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Subject[PATCH 0/4] perf trace: Add filter Suppport, V2
This patchset adds filter support for perf counter, so not all
profile events are recorded but only those match the filters
we set.

An example:

#./perf record -R -f -e irq:irq_handler_entry --filter irq==18
^C
# ./perf trace
perf-4303 ... irq_handler_entry: irq=18 handler=eth0
init-0 ... irq_handler_entry: irq=18 handler=eth0
init-0 ... irq_handler_entry: irq=18 handler=eth0
init-0 ... irq_handler_entry: irq=18 handler=eth0
init-0 ... irq_handler_entry: irq=18 handler=eth0

The syntax of filter expressions can be found in
Documentation/trace/events.txt.

Major changes from v1:

- Make filters per perf event, instead of per tracepoint.

- Use "--filter" to set a filter for a trace event, instead of
mixing it into "-e" option.

---
include/linux/ftrace_event.h | 11 +-
include/linux/perf_counter.h | 1 +
include/linux/perf_event.h | 7 +
kernel/perf_event.c | 81 +++++++++-
kernel/trace/trace.h | 6 +-
kernel/trace/trace_events_filter.c | 320 +++++++++++++++++++++---------------
tools/perf/builtin-record.c | 15 ++-
tools/perf/util/parse-events.c | 26 +++-
tools/perf/util/parse-events.h | 2 +
9 files changed, 322 insertions(+), 147 deletions(-)




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