diff options
author | Jiri Olsa <jolsa@kernel.org> | 2019-10-13 17:14:25 +0200 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-10-15 08:36:22 -0300 |
commit | bb91a073ed124d3f6224d8ac37ecb536c01970c1 (patch) | |
tree | 038165ba00d9ac28243c98a5306af5812d9befd1 /tools/perf | |
parent | 39b656ee9f2ce41eb969c86525f9a2a63fefac5b (diff) |
perf tools: Allow to build with -ltcmalloc
By using "make TCMALLOC=1" you can enable perf to be build for usage
with libtcmalloc.so (gperftools).
Get heap profile (tools/perf directory):
$ <install gperftools>
$ make TCMALLOC=1 DEBUG=1
$ HEAPPROFILE=/tmp/heapprof ./perf ...
$ pprof ./perf /tmp/heapprof.000*
(pprof) top
Total: 2335.5 MB
1735.1 74.3% 74.3% 1735.1 74.3% memdup
402.0 17.2% 91.5% 402.0 17.2% zalloc
140.2 6.0% 97.5% 145.8 6.2% map__new
33.6 1.4% 98.9% 33.6 1.4% symbol__new
12.4 0.5% 99.5% 12.4 0.5% alloc_event
6.2 0.3% 99.7% 6.2 0.3% nsinfo__new
5.5 0.2% 100.0% 5.5 0.2% nsinfo__copy
0.3 0.0% 100.0% 0.3 0.0% dso__new
0.1 0.0% 100.0% 0.1 0.0% do_read_string
0.0 0.0% 100.0% 0.0 0.0% __GI__IO_file_doallocate
See callstack:
$ pprof --pdf ./perf /tmp/heapprof.00* > callstack.pdf
$ pprof --web ./perf /tmp/heapprof.00*
Committer testing:
Install gperftools, on fedora:
# dnf install gperftools-devel
Then build:
$ make TCMALLOC=1 DEBUG=1 -C tools/perf O=/tmp/build/perf install-bin
Verify that it linked against the right library:
$ ldd ~/bin/perf | grep tcma
libtcmalloc.so.4 => /lib64/libtcmalloc.so.4 (0x00007fb2953a7000)
$
Run 'perf trace' system wide for 1 minute:
# HEAPPROFILE=/tmp/heapprof perf trace -a sleep 1m
<SNIP>
59985.524 ( 0.006 ms): Web Content/20354 recvmsg(fd: 9<socket:[1762817]>, msg: 0x7ffee5fdafb0) = -1 EAGAIN (Resource temporarily unavailable)
59985.536 ( 0.005 ms): Web Content/20354 recvmsg(fd: 9<socket:[1762817]>, msg: 0x7ffee5fdafc0) = -1 EAGAIN (Resource temporarily unavailable)
59981.956 (10.143 ms): SCTP timer/21716 ... [continued]: select()) = 0 (Timeout)
59985.549 ( ): Web Content/20354 poll(ufds: 0x7f1df38af180, nfds: 3, timeout_msecs: 4294967295) ...
0.926 (59999.481 ms): sleep/29764 ... [continued]: nanosleep()) = 0
59992.133 ( ): SCTP timer/21716 select(tvp: 0x7ff5bf7fee80) ...
60000.477 ( 0.009 ms): sleep/29764 close(fd: 1) = 0
60000.493 ( 0.005 ms): sleep/29764 close(fd: 2) = 0
60000.514 ( ): sleep/29764 exit_group() = ?
Dumping heap profile to /tmp/heapprof.0001.heap (Exiting, 3 MB in use)
[root@quaco ~]#
Install pprof:
# dnf install pprof
And run it:
# pprof ~/bin/perf /tmp/heapprof.0001.heap
Using local file /root/bin/perf.
Using local file /tmp/heapprof.0001.heap.
Welcome to pprof! For help, type 'help'.
(pprof) top
Total: 4.0 MB
1.7 42.0% 42.0% 2.2 54.1% map__new
0.9 23.3% 65.3% 0.9 23.3% zalloc
0.5 11.4% 76.7% 0.5 11.4% dso__new
0.2 5.6% 82.3% 0.3 8.5% trace__sys_enter
0.2 4.9% 87.2% 0.2 4.9% __GI___strdup
0.2 3.8% 91.0% 0.2 3.8% new_term
0.1 2.2% 93.2% 0.4 10.1% __perf_pmu__new_alias
0.0 1.0% 94.3% 0.0 1.2% event_read_fields
0.0 0.8% 95.1% 0.0 0.8% nsinfo__new
0.0 0.7% 95.8% 0.1 3.2% trace__read_syscall_info
(pprof)
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191013151427.11941-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r-- | tools/perf/Makefile.config | 5 | ||||
-rw-r--r-- | tools/perf/Makefile.perf | 2 |
2 files changed, 7 insertions, 0 deletions
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index 063202c53b64..1783427da9b0 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -265,6 +265,11 @@ LDFLAGS += -Wl,-z,noexecstack EXTLIBS = -lpthread -lrt -lm -ldl +ifneq ($(TCMALLOC),) + CFLAGS += -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-free + EXTLIBS += -ltcmalloc +endif + ifeq ($(FEATURES_DUMP),) include $(srctree)/tools/build/Makefile.feature else diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index a099a8a89447..8f1ba986d3bf 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -114,6 +114,8 @@ include ../scripts/utilities.mak # Define NO_LIBZSTD if you do not want support of Zstandard based runtime # trace compression in record mode. # +# Define TCMALLOC to enable tcmalloc heap profiling. +# # As per kernel Makefile, avoid funny character set dependencies unexport LC_ALL |