linux-toradex.git/tools/lib/api, branch v4.14-rc7

tools lib api: Fix make DEBUG=1 build

2017-09-12T15:34:14+00:00

Do not use -D_FORTIFY_SOURCE=2 for DEBUG build as it seems to mess up
with debuginfo, which results in bad gdb experience.

We already do that for tools/perf/.

Signed-off-by: Jiri Olsa 
Cc: David Ahern 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20170908084621.31595-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Robustify detection of clang binary

2017-08-28T19:44:46+00:00

Prior to this patch, make scripts tested for CLANG with ifeq ($(CC),
clang), failing to detect CLANG binaries with different names. Fix it by
testing for the existence of __clang__ macro in the list of compiler
defined macros.

Signed-off-by: David Carrillo-Cisneros 
Acked-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Paul Turner 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/20170827075442.108534-5-davidcc@google.com
Signed-off-by: Arnaldo Carvalho de Melo

tools lib: Allow external definition of CC, AR and LD

2017-08-28T19:44:45+00:00

Use already defined values for CC, AR and LD when available.

Signed-off-by: David Carrillo-Cisneros 
Acked-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Paul Turner 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/20170827075442.108534-4-davidcc@google.com
Signed-off-by: Arnaldo Carvalho de Melo

tools lib api fs: Add sysfs__write_int function

2017-06-21T14:35:27+00:00

Add sysfs__write_int() to ease up writing int to sysfs.  New interface
is:

  int sysfs__write_int(const char *entry, int value);

Also, introducing filename__write_int() which is useful for new helpers
to write sysctl values.

Signed-off-by: Kan Liang 
Acked-by: Jiri Olsa 
Cc: Andi Kleen 
Cc: Kan Liang 
Cc: Peter Zijlstra 
Cc: Robert Elliott 
Cc: Stephane Eranian 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1495825538-5230-2-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

tools lib api fs: Introduce sysfs__read_bool

2017-03-17T14:49:09+00:00

Will be used in a upcoming patch warning about PERF_RECORD_AUX data
gaps, reading the "module/kvm_intel/parameters/vmm_exclusive" sysfs
entry.

Signed-off-by: Alexander Shishkin 
Tested-by: Arnaldo Carvalho de Melo 
Cc: Adrian Hunter 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Cc: Vince Weaver 
Link: http://lkml.kernel.org/r/8760j941ig.fsf@ashishki-desk.ger.corp.intel.com
[ split from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo

tools: Set the maximum optimization level according to the compiler being used

2017-02-14T13:55:27+00:00

To avoid this when using clang:

  warning: optimization level '-O6' is not supported; using '-O3' instead

Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: http://lkml.kernel.org/n/tip-kaghp8ddvzdsg03putemcq96@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf sdt: Show proper hint when event not yet in place via 'perf probe'

2017-02-08T12:28:54+00:00

All events from 'perf list', except SDT events, can be directly recorded
with 'perf record'. But, the flow is little different for SDT events.

Probe points for SDT event needs to be created using 'perf probe' before
recording it using 'perf record'.

Perf shows misleading hint when a user tries to record SDT event without
first creating a probe point. Show proper hint there.

Before patch:

  $ perf record -a -e sdt_glib:idle__add
    event syntax error: 'sdt_glib:idle__add'
                         \___ unknown tracepoint

    Error: File /sys/kernel/debug/tracing/events/sdt_glib/idle__add not found.
    Hint:  Perhaps this kernel misses some CONFIG_ setting to enable this feature?.
    ...

After patch:

  $ perf record -a -e sdt_glib:idle__add
    event syntax error: 'sdt_glib:idle__add'
                         \___ unknown tracepoint

    Error: File /sys/kernel/debug/tracing/events/sdt_glib/idle__add not found.
    Hint:  SDT event cannot be directly recorded on.
           Please first use 'perf probe sdt_glib:idle__add' before recording it.
    ...

  $ perf probe sdt_glib:idle__add
    Added new event:
      sdt_glib:idle__add   (on %idle__add in /usr/lib64/libglib-2.0.so.0.5000.2)

    You can now use it in all perf tools, such as:

        perf record -e sdt_glib:idle__add -aR sleep 1

  $ perf record -a -e sdt_glib:idle__add
    [ perf record: Woken up 1 times to write data ]
    [ perf record: Captured and wrote 0.175 MB perf.data ]

Suggested-and-Acked-by: Ingo Molnar 
Signed-off-by: Ravi Bangoria 
Tested-by: Arnaldo Carvalho de Melo 
Acked-by: Masami Hiramatsu 
Cc: Alexander Shishkin 
Cc: Alexis Berlemont 
Cc: Madhavan Srinivasan 
Cc: Michael Ellerman 
Cc: Naveen N. Rao 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20170203102642.17258-1-ravi.bangoria@linux.vnet.ibm.com
[ s/Please use/Please first use/ and break the Hint line in two ]
Signed-off-by: Arnaldo Carvalho de Melo

tools lib api fs: Add bpf_fs filesystem detector

2017-01-31T19:20:07+00:00

Allow mounting of the BPF filesystem at /sys/fs/bpf.

Signed-off-by: Joe Stringer 
Cc: Alexei Starovoitov 
Cc: Daniel Borkmann 
Cc: Wang Nan 
Cc: netdev@vger.kernel.org
Link: http://lkml.kernel.org/r/20170126212001.14103-6-joe@ovn.org
Signed-off-by: Arnaldo Carvalho de Melo

make use of make variable CURDIR instead of calling pwd

2016-12-11T11:12:56+00:00

make already provides the current working directory in a variable, so make
use of it instead of forking a shell. Also replace usage of PWD by
CURDIR. PWD is provided by most shells, but not all, so this makes the
build system more robust.

Signed-off-by: Uwe Kleine-König 
Signed-off-by: Michal Marek

tools lib api fs: Add hugetlbfs filesystem detector

2016-09-08T15:34:43+00:00

Detect hugetlbfs. hugetlbfs__mountpoint() will be used during recording
to help identifying hugetlb mmaps: which should be recognized as anon
mapping.

Signed-off-by: Wang Nan 
Reviewed-by: Nilay Vaish 
Cc: He Kuang 
Cc: Hou Pengyang 
Cc: Zefan Li 
Link: http://lkml.kernel.org/r/1473137909-142064-3-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo