kernel/linux.git/tools/perf/config, branch v4.6.4

perf probe: Check if dwarf_getlocations() is available

2016-05-12T14:26:59+00:00

If not, tell the user that: config/Makefile:273: Old libdw.h, finding variables at given 'perf probe' point will not work, install elfutils-devel/libdw-dev >= 0.157 And return -ENOTSUPP in die_get_var_range(), failing features that need it, like the one pointed out above. This fixes the build on older systems, such as Ubuntu 12.04.5. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Vinson Lee Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-9l7luqkq4gfnx7vrklkq4obs@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

tools: Move utilities.mak from perf to tools/scripts/

2016-03-18T16:57:20+00:00

As it is used by several other tools, better move it outside tools/perf. Cc: Adrian Hunter Cc: Jiri Olsa Cc: Josh Poimboeuf Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-34s9kue3xq9w5mijdmfrfx8s@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf jitdump: Build only on supported archs

2016-03-10T19:33:19+00:00

Build jitdump only on architectures defined in util/genelf.h file, to avoid breaking the build on such arches. Signed-off-by: Jiri Olsa Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Borislav Petkov Cc: Colin Ian King Cc: David Ahern Cc: Davidlohr Bueso Cc: He Kuang Cc: Mel Gorman Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Steven Rostedt Cc: Wang Nan Link: http://lkml.kernel.org/r/20160310164113.GA11357@krava.redhat.com Signed-off-by: Arnaldo Carvalho de Melo

perf build: Add libcrypto feature detection

2016-02-05T12:46:45+00:00

Will be used to generate build-ids in the jitdump code. Signed-off-by: Stephane Eranian Cc: Adrian Hunter Cc: Andi Kleen Cc: Carl Love Cc: David Ahern Cc: Jiri Olsa Cc: John McCutchan Cc: Namhyung Kim Cc: Pawel Moll Cc: Peter Zijlstra Cc: Sonny Rao Cc: Sukadev Bhattiprolu Link: http://lkml.kernel.org/r/1448874143-7269-3-git-send-email-eranian@google.com [ tools/perf/Makefile.perf comment about NO_LIBCRYPTO and added it to tests/make ] Signed-off-by: Arnaldo Carvalho de Melo

perf build: Remove all condition feature check {C,LD}FLAGS

2016-01-29T17:47:52+00:00

'make feature-dump' should give a stable result, so even 'NO_SOMETHING=1' is given (for babeltrace, if LIBBABELTRACE=1 is not given), we should try to detect those feature and {C,LD}FLAGS. Build or not should be controled independent. Signed-off-by: Wang Nan Cc: Jiri Olsa Cc: Li Zefan Link: http://lkml.kernel.org/r/1454047050-204993-1-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

perf build: Introduce FEATURES_DUMP make variable

2016-01-15T19:32:00+00:00

Introducing FEATURES_DUMP make variable to provide features detection dump file and bypass the feature detection. The intention is to use this during build tests to skip repeated features detection, like: Get feature dump static build into /tmp/fd file: $ make feature-dump FEATURE_DUMP_COPY=/tmp/fd LDFLAGS=-static BUILD: Doing 'make -j4' parallel build Auto-detecting system features: ... dwarf: [ OFF ] SNIP FEATURE-DUMP file copied into /tmp/fd Use /tmp/fd to build perf: $ make FEATURES_DUMP=/tmp/fd LDFLAGS=-static $ file perf perf: ELF 64-bit LSB executable, x86-64, version 1 (GNU/Linux), statically linked, for ... Suggested-by: Wang Nan Signed-off-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1452830421-77757-7-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Set and pass DOCDIR to builtin-report.c

2016-01-12T15:42:07+00:00

It'll be used to locate perf document directory to find tips.txt in case it's not installed on the system. Signed-off-by: Namhyung Kim Cc: Andi Kleen Cc: David Ahern Cc: Jiri Olsa Cc: Peter Zijlstra Cc: Wang Nan Link: http://lkml.kernel.org/r/1452334589-8782-3-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

tools: Move Makefile.arch from perf/config to tools/scripts

2016-01-11T22:22:20+00:00

After this patch other directories can use this architecture detector without directly including it from perf's directory. Libbpf would utilize it to get proper $(ARCH) so it can receive correct uapi include directory. Tested-by: Naveen N. Rao Acked-by: Jiri Olsa Cc: Sukadev Bhattiprolu Cc: Zefan Li Cc: pi3orama@163.com Signed-off-by: Wang Nan Link: http://lkml.kernel.org/r/1452520124-2073-8-git-send-email-wangnan0@huawei.com [ Add missing srctree definition in tests/make ] Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add -lutil in python lib list for broken python-config

2016-01-11T22:03:16+00:00

On some system the perf-config is broken, causes link failure like this: /usr/lib64/python2.7/config/libpython2.7.a(posixmodule.o): In function `posix_forkpty': /opt/wangnan/yocto-build/tmp-eglibc/work/x86_64-oe-linux/python/2.7.3-r0.3.1/Python-2.7.3/./Modules/posixmodule.c:3816: undefined reference to `forkpty' /usr/lib64/python2.7/config/libpython2.7.a(posixmodule.o): In function `posix_openpty': /opt/wangnan/yocto-build/tmp-eglibc/work/x86_64-oe-linux/python/2.7.3-r0.3.1/Python-2.7.3/./Modules/posixmodule.c:3756: undefined reference to `openpty' collect2: error: ld returned 1 exit status make[1]: *** [/home/wangnan/kernel-hydrogen/tools/perf/out/perf] Error 1 make: *** [all] Error 2 $ python-config --libs -lpthread -ldl -lpthread -lutil -lm -lpython2.7 In this case a '-lutil' should be appended to -lpython2.7. (I know we have --start-group and --end-group. I can see them in command line of collect2 by strace. However it doesn't work. Seems I have a broken environment?) Signed-off-by: Wang Nan Cc: Jiri Olsa Cc: Namhyung Kim Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1452520124-2073-2-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

perf report: Show random usage tip on the help line

2016-01-08T16:15:46+00:00

Currently perf report only shows a help message "For a higher level overview, try: perf report --sort comm,dso" unconditionally (even if the sort keys were used). Add more help tips and show randomly. Load tips from ${prefix}/share/doc/perf-tip/tips.txt file. $ perf report | tail 0.10% swapper [kernel.vmlinux] [k] irq_exit 0.09% swapper [kernel.vmlinux] [k] flush_smp_call_function_queue 0.08% swapper [kernel.vmlinux] [k] native_write_msr_safe 0.03% swapper [kernel.vmlinux] [k] group_sched_in 0.01% perf [kernel.vmlinux] [k] native_write_msr_safe # # (Tip: Search options using a keyword: perf report -h ) # Signed-off-by: Namhyung Kim Acked-by: Ingo Molnar Cc: Andi Kleen Cc: David Ahern Cc: Jiri Olsa Cc: Masami Hiramatsu Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Wang Nan Link: http://lkml.kernel.org/r/1452166913-27046-1-git-send-email-namhyung@kernel.org [ Renamed it to perf_tip() and the parameter dirname to dirpath to fix the build on older distros ] Signed-off-by: Arnaldo Carvalho de Melo