[RFC 00/20] perf: Finish sampling commands when events are closed

Jiri Olsa
2014-08-11T08:50:36Z

hi,
adding support to quit sampling commands:
record,top,trace,kvm stat live

when all the monitored events are closed, like following perf
command will now exit when monitored process (pid 1234) exits:

$ perf record -p 1234

I added independent poller object to handle basic polling
tasks. I had to factor some parts, so sending this as RFC,
because I'm pretty sure I broke something else ;-)

The patch#1 is kernel change, which is needed for the
patchset to work properly. The current behavior stays
without this kernel change.

The code is based on latest Arnaldo's perf/core and
following kernel change:
http://marc.info/?l=linux-kernel&m=140715910417130&w=2

The patchset is also reachable in here:
git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
perf/core_poll

thanks for comments,
jirka

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
Jiri Olsa (20):
perf: Add PERF_EVENT_STATE_EXIT state for events with exited task
perf tools: Add poller object to handle polling globaly
perf tests: Add poller object test
perf tools: Add support to traverse xyarrays
perf tools: Introduce perf_evsel__fd function
perf tools: Add evlist/evsel poller object support
perf record: Add support to see event's ERR and HUP poll errors
perf tools: Add set_term_quiet_input helper function
perf tui browser: Add interface to terminate browser from uotside
perf top: Add support to see event's ERR and HUP poll errors
perf top: Join the display thread on exit
perf top: Use set_term_quiet_input for terminal input
perf top: Setup signals for terminal output
perf top: Use poller object for display thread stdin
perf kvm: Fix stdin handling for 'kvm stat live' command
perf kvm: Add support to see event's ERR and HUP poll errors
perf trace: Add support to see event's ERR and HUP poll errors
perf python: Use poller object for polling
perf tests: Use poller object for polling
perf tools: Remove pollfd stuff out of evlist object

include/linux/perf_event.h | 1 +
kernel/events/core.c | 12 ++++-
tools/perf/Makefile.perf | 4 ++
tools/perf/builtin-kvm.c | 123 +++++++++++++++++++++++------------------------
tools/perf/builtin-record.c | 29 ++++++++++-
tools/perf/builtin-report.c | 3 +-
tools/perf/builtin-top.c | 104 ++++++++++++++++++++++++++--------------
tools/perf/builtin-trace.c | 25 +++++++++-
tools/perf/tests/builtin-test.c | 8 ++++
tools/perf/tests/open-syscall-tp-fields.c | 9 +++-
tools/perf/tests/perf-record.c | 4 --
tools/perf/tests/poller.c | 126 ++++++++++++++++++++++++++++++++++++++++++++++++
tools/perf/tests/task-exit.c | 9 +++-
tools/perf/tests/tests.h | 2 +
tools/perf/tests/xyarray.c | 33 +++++++++++++
tools/perf/ui/browser.c | 4 +-
tools/perf/ui/browser.h | 8 +++-
tools/perf/ui/browsers/annotate.c | 2 +-
tools/perf/ui/browsers/header.c | 2 +-
tools/perf/ui/browsers/hists.c | 39 ++++++++-------
tools/perf/ui/browsers/map.c | 2 +-
tools/perf/ui/browsers/scripts.c | 2 +-
tools/perf/ui/keysyms.h | 1 +
tools/perf/ui/tui/util.c | 2 +-
tools/perf/util/evlist.c | 38 ++++++---------
tools/perf/util/evlist.h | 7 ++-
tools/perf/util/evsel.c | 21 +++++++-
tools/perf/util/evsel.h | 10 ++++
tools/perf/util/hist.h | 6 ++-
tools/perf/util/kvm-stat.h | 1 -
tools/perf/util/poller.c | 233 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
tools/perf/util/poller.h | 88 ++++++++++++++++++++++++++++++++++
tools/perf/util/python-ext-sources | 2 +
tools/perf/util/python.c | 19 ++++++--
tools/perf/util/util.c | 13 +++++
tools/perf/util/util.h | 2 +
tools/perf/util/xyarray.c | 4 +-
tools/perf/util/xyarray.h | 6 +++
38 files changed, 832 insertions(+), 172 deletions(-)
create mode 100644 tools/perf/tests/poller.c
create mode 100644 tools/perf/tests/xyarray.c
create mode 100644 tools/perf/util/poller.c
create mode 100644 tools/perf/util/poller.h