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Commit aa30a2e0 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

Merge tag 'perf-core-for-mingo' of... 

Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

 into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

  * Convert callchain children list to rbtree, greatly reducing the time
    taken for callchain processing, from Namhyung Kim.

  * Add --max-stack option to limit callchain stack scan in 'top' and 'report',
    improving callchain processing when reducing the stack depth is an option,
    from Waiman Long.

  * Compare dso's also when comparing symbols, to avoid grouping together
    symbols with the same name but on different DSOs, fix from Namhyung Kim.

  * 'perf trace' now can can use a 'perf probe' wannabe tracepoint to hook into
    the userspace -> kernel pathname copy so that it can map fds to pathnames
    without reading /proc/pid/fd/ symlinks. From Arnaldo Carvalho de Melo.

  * 'perf trace' now emits hints as to why tracing is not possible, helping the
    user to setup the system to allow tracing in the desired permission
    granularity, telling if the problem is due to debugfs not being mounted or
    with not enough permission for !root, /proc/sys/kernel/perf_event_paranoit
    value, etc. From Arnaldo Carvalho de Melo.

  * Add missing 'mmap2' in evsel debug print, from Adrian Hunter.

  * Add missing decrement in id sample parsing, not a fix per se, just to
    avoid a problem whem somebody adds another field, from Adrian Hunter.

  * Improve write_output error message in 'perf record', from Adrian Hunter.

  * Add missing sample flush for piped events, fix from Adrian Hunter.

  * Add missing members to perf_event__attr_swap(), fix from Adrian Hunter.

  * Assorted fixes for 32-bit build, from Adrian Hunter

  * Print addr by default for BTS in 'perf script', from Adrian Juntmer

  * Separating data file properties from session, code reorganization from
    Jiri Olsa.

  * Show error in 'perf list' if tracepoints not available, from Pekka Enberg.

Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parents 9536c8d2 5dbb6e81

tools/perf/Documentation/perf-report.txt

+8 −0
Original line number Diff line number Diff line
@@ -141,6 +141,14 @@ OPTIONS 


	Default: fractal,0.5,callee,function.



--max-stack::

	Set the stack depth limit when parsing the callchain, anything

	beyond the specified depth will be ignored. This is a trade-off

	between information loss and faster processing especially for

	workloads that can have a very long callchain stack.



	Default: 127



-G::

--inverted::

        alias for inverted caller based call graph.

tools/perf/Documentation/perf-top.txt

+8 −0
Original line number Diff line number Diff line
@@ -158,6 +158,14 @@ Default is to monitor all CPUS. 


	Default: fractal,0.5,callee.



--max-stack::

	Set the stack depth limit when parsing the callchain, anything

	beyond the specified depth will be ignored. This is a trade-off

	between information loss and faster processing especially for

	workloads that can have a very long callchain stack.



	Default: 127



--ignore-callees=<regex>::

        Ignore callees of the function(s) matching the given regex.

        This has the effect of collecting the callers of each such

tools/perf/Documentation/perf-trace.txt

+4 −0
Original line number Diff line number Diff line
@@ -97,6 +97,10 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs. 
	Show a summary of syscalls by thread with min, max, and average times (in

    msec) and relative stddev.



--tool_stats::

	Show tool stats such as number of times fd->pathname was discovered thru

	hooking the open syscall return + vfs_getname or via reading /proc/pid/fd, etc.



SEE ALSO

--------

linkperf:perf-record[1], linkperf:perf-script[1]

tools/perf/Makefile.perf

+1 −0
Original line number Diff line number Diff line
@@ -365,6 +365,7 @@ LIB_OBJS += $(OUTPUT)util/vdso.o 
LIB_OBJS += $(OUTPUT)util/stat.o

LIB_OBJS += $(OUTPUT)util/record.o

LIB_OBJS += $(OUTPUT)util/srcline.o

LIB_OBJS += $(OUTPUT)util/data.o



LIB_OBJS += $(OUTPUT)ui/setup.o

LIB_OBJS += $(OUTPUT)ui/helpline.o

tools/perf/bench/numa.c

+2 −2
Original line number Diff line number Diff line
@@ -1120,7 +1120,7 @@ static void *worker_thread(void *__tdata) 
		/* Check whether our max runtime timed out: */

		if (g->p.nr_secs) {

			timersub(&stop, &start0, &diff);

			if (diff.tv_sec >= g->p.nr_secs) {

			if ((u32)diff.tv_sec >= g->p.nr_secs) {

				g->stop_work = true;

				break;

			}
@@ -1167,7 +1167,7 @@ static void *worker_thread(void *__tdata) 
			runtime_ns_max += diff.tv_usec * 1000;



			if (details >= 0) {

				printf(" #%2d / %2d: %14.2lf nsecs/op [val: %016lx]\n",

				printf(" #%2d / %2d: %14.2lf nsecs/op [val: %016"PRIx64"]\n",

					process_nr, thread_nr, runtime_ns_max / bytes_done, val);

			}

			fflush(stdout);