hi, this patchset moves thread's map_groups to be dynamically allocated and shared within process threads.
The main benefit would be to be able to look up memory map from any thread that belongs to the process. This implements one of the solution ideas for issue described by Don in following thread: http://marc.info/?l=linux-kernel&m=139403876017159&w=2 v2 changes: - changing mmap groups allocation strategy - have it allocated always when thread is created, which seems less confusing and less error prone. The previous strategy was to allocate it when it's actually used. - fix test compilation for i386 RFC changes: - added automated test for thread map groups get/put methods - fix reference count for case described by Namhyung - rename the mmap-events.c test to mmap-thread-lookup.c - added PROT_EXEC to mmap call in tests/mmap-thread-lookup.c as it's not implied by default on all archs (Namhyung) - lazy mg allocation in thread__find_addr_map (Namhyung) - fix compilation failures (Arnaldo) also available in here: git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git perf/core_mmaps thanks, jirka Signed-off-by: Jiri Olsa <[email protected]> Cc: Don Zickus <[email protected]> Cc: Corey Ashford <[email protected]> Cc: David Ahern <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> --- Arnaldo Carvalho de Melo (2): perf tools: Allocate thread map_groups's dynamically perf tools: Reference count map_groups objects Jiri Olsa (3): perf tests: Add thread maps lookup automated tests perf tools: Share map_groups among threads of the same group perf tests: Add map groups sharing with thread object test tools/perf/Makefile.perf | 2 + tools/perf/arch/x86/tests/dwarf-unwind.c | 2 +- tools/perf/perf.h | 6 +++ tools/perf/tests/builtin-test.c | 8 ++++ tools/perf/tests/mmap-thread-lookup.c | 233 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ tools/perf/tests/tests.h | 2 + tools/perf/tests/thread-mg-share.c | 90 +++++++++++++++++++++++++++++++++++ tools/perf/ui/stdio/hist.c | 2 +- tools/perf/util/event.c | 2 +- tools/perf/util/machine.c | 11 +++++ tools/perf/util/map.c | 23 +++++++++ tools/perf/util/map.h | 12 +++++ tools/perf/util/thread.c | 52 +++++++++++++++----- tools/perf/util/thread.h | 3 +- 14 files changed, 432 insertions(+), 16 deletions(-) create mode 100644 tools/perf/tests/mmap-thread-lookup.c create mode 100644 tools/perf/tests/thread-mg-share.c -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
