litmus-rt.git/tools/perf/Makefile, branch test

perf tools: Use getconf to determine number of online CPUs

2015-05-12T21:11:16+00:00

Parsing /proc/cpuinfo is a fiddly, arch-dependent business and a recent
change to get it working for Sparc broke arm and arm64 platforms.

Use sysconf to determine the number of online CPUs only parsing
/proc/cpuinfo when sysconf is not available.

Signed-off-by: Will Deacon 
Acked-by: Jiri Olsa 
Tested-by: Arnaldo Carvalho de Melo 
Cc: David Ahern 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Link: http://lkml.kernel.org/r/20150423140454.GJ1652@arm.com
[ Made it fall back to parsing /proc when getconf not found ]
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Set JOBS based on CPU or processor

2015-03-26T13:52:28+00:00

Number of JOBS to use is set automatically to the number of processors found
in /proc/cpuinfo. SPARC uses 'CPU' lines rather than 'processor'. Update the
check in perf's Makefile to work for SPARC.

Signed-off-by: David Ahern 
Acked-by: Jiri Olsa 
Cc: Namhyung Kim 
Link: http://lkml.kernel.org/r/1427213455-127249-1-git-send-email-david.ahern@oracle.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Compare JOBS to 0 after grep

2015-03-02T14:51:00+00:00

If JOBS is not by user perf tries to autodetect the number by grepping
the number of CPUs from /proc/cpuinfo. 'grep -c' will always return an
integer so after this command JOBS should be compared to 0, not "".

Signed-off-by: David Ahern 
Link: http://lkml.kernel.org/r/1424303971-91904-1-git-send-email-david.ahern@oracle.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add 'build-test' make target

2014-01-16T19:26:26+00:00

Currently various build test can be performed using a Makefile named
tests/make, so one needs to remember and specify it with -f option on
command line.

Add the 'build-test' target in the main Makefile as a shortcut.

Signed-off-by: Namhyung Kim 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1389837173-3632-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Fix tags/TAGS targets rebuilding

2013-11-27T19:47:14+00:00

Once the tags/TAGS file is generated it's never rebuilt until it's
removed by hand.

The reason is that the Makefile does not treat tags/TAGS as targets but
as files and thus won't rebuilt them once they are in place.

Adding PHONY tags/TAGS targets into Makefile.

Signed-off-by: Jiri Olsa 
Acked-by: Ingo Molnar 
Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Frederic Weisbecker 
Cc: Ingo Molnar 
Cc: Mike Galbraith 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/20131126125412.GJ1267@krava.brq.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo

tools/perf/build: Pass through DEBUG parameter

2013-10-14T13:29:07+00:00

Arnaldo reported that 'make DEBUG=1' does not work anymore.

The reason is that 'Makefile' only passes it through to
'Makefile.perf' via the environment, but 'Makefile.perf'
checks that it's a command line option:

    ifeq ("$(origin DEBUG)", "command line")
      PERF_DEBUG = $(DEBUG)
    endif

So pass it through properly, and also clean up DEBUG parameter
handling while at it and fix a couple of annoyances:

 - DEBUG=0 used to be interpreted as 'debugging on'. Turn it
   into 'debugging off' instead.

 - Same was the case for 'DEBUG=' - turn that into debug-off
   as well.

 - Pass in just a clean, sanitized 'DEBUG' value and get rid of
   the intermediate, unnecessary PERF_DEBUG variable.

Reported-by: Arnaldo Carvalho de Melo 
Cc: Peter Zijlstra 
Cc: Namhyung Kim 
Cc: David Ahern 
Cc: Jiri Olsa 
Signed-off-by: Ingo Molnar 
Signed-off-by: Arnaldo Carvalho de Melo

tools/perf/build: Fix non-existent build directory handling

2013-10-14T13:29:05+00:00

Arnaldo reported that non-existent build directories were not
recognized  properly. The reason is readlink failure causing 'O'
to become empty.

Solve it by passing through the 'O' variable unmodified if
readlink fails.

Reported-by: Arnaldo Carvalho de Melo 
Cc: Peter Zijlstra 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Link: http://lkml.kernel.org/r/20131009150023.GA10167@gmail.com
Signed-off-by: Ingo Molnar 
Signed-off-by: Arnaldo Carvalho de Melo

tools: Harmonize the various build messages in perf, lib-traceevent, lib-lk

2013-10-11T15:18:08+00:00

The various build lines from libtraceevent and perf mix up during a
parallel build and produce unaligned output like:

    CC builtin-buildid-list.o
    CC builtin-buildid-cache.o
    CC builtin-list.o
  CC FPIC            trace-seq.o
    CC builtin-record.o
  CC FPIC            parse-filter.o
    CC builtin-report.o
    CC builtin-stat.o
  CC FPIC            parse-utils.o
  CC FPIC            kbuffer-parse.o
    CC builtin-timechart.o
    CC builtin-top.o
    CC builtin-script.o
  BUILD STATIC LIB   libtraceevent.a
    CC builtin-probe.o
    CC builtin-kmem.o
    CC builtin-lock.o

To solve this, harmonize all the build message alignments to be similar
to the kernel's kbuild output: prefixed by two spaces and 11-char wide.

After the patch the output looks pretty tidy, even if output lines get
mixed up:

  CC      builtin-annotate.o
  FLAGS:  * new build flags or cross compiler
  CC      builtin-bench.o
  AR      liblk.a
  CC      bench/sched-messaging.o
  CC FPIC event-parse.o
  CC      bench/sched-pipe.o
  CC FPIC trace-seq.o
  CC      bench/mem-memcpy.o
  CC      bench/mem-memset.o
  CC FPIC parse-filter.o
  CC      builtin-diff.o
  CC      builtin-evlist.o
  CC      builtin-help.o

Signed-off-by: Ingo Molnar 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1381312169-17354-3-git-send-email-mingo@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

tools/perf/build: Fix non-canonical directory names in O=

2013-10-09T06:49:01+00:00

This was a long-standing bug, relative pathnames like O=dir did not fully
work in the build system:

    $ make O=localdir clean

    SUBDIR Documentation
    ../../scripts/Makefile.include:3: *** O=localdir does not exist.  Stop.
    make[1]: *** [clean] Error 2
    make: *** [clean] Error 2

Fix this by canonizing the directory before passing it to Makefile.perf.

Cc: Arnaldo Carvalho de Melo 
Cc: Peter Zijlstra 
Cc: Namhyung Kim 
Cc: David Ahern 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/n/tip-hchMp1hozn9tqgswWcooxcru@git.kernel.org
Signed-off-by: Ingo Molnar

tools/perf/build: Exclude MAKEFLAGS from nested invocation

2013-10-09T06:49:01+00:00

In case the user specifies MAKEFLAGS as an environment variable,
or uses 'make -jN' explicitly, the options can conflict and result in:

    BUILD: Doing 'make -j8' parallel build
    make[1]: warning: -jN forced in submake: disabling jobserver mode.
    GEN common-cmds.h
    make[1]: *** write jobserver: Bad file descriptor.  Stop.

Make sure we invoke the main makefile in a pristine state.

Users who want to do something non-standard can use the:

  make -f Makefile.perf

method to invoke the makefile.

Cc: Arnaldo Carvalho de Melo 
Cc: Peter Zijlstra 
Cc: Namhyung Kim 
Cc: David Ahern 
Cc: Jiri Olsa 
Link: http://lkml.kernel.org/n/tip-uen6hzTvkqqngqwjma9yoEgw@git.kernel.org
Signed-off-by: Ingo Molnar