linux

iv/linux

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Ravi Bangoria 3a9e9a4709 perf trace: Fix call-graph output

Recently, Arnaldo fixed global vs event specific --max-stack usage with
commit bd3dda9ab0fb ("perf trace: Allow overriding global --max-stack
per event"). This commit is having a regression when we don't use
--max-stack at all with perf trace. Ex,

  $ ./perf trace record -g ls
  $ ./perf trace -i perf.data
     0.076 ( 0.002 ms): ls/9109 brk(
     0.196 ( 0.008 ms): ls/9109 access(filename: 0x9f998b70, mode: R
     0.209 ( 0.031 ms): ls/9109 open(filename: 0x9f998978, flags: CLOEXEC

This is missing call-traces.
After patch:

  $ ./perf trace -i perf.data
     0.076 ( 0.002 ms): ls/9109 brk(
                                do_syscall_trace_leave ([kernel.kallsyms])
                                [0] ([unknown])
                                syscall_exit_work ([kernel.kallsyms])
                                brk (/usr/lib64/ld-2.17.so)
                                _dl_sysdep_start (/usr/lib64/ld-2.17.so)
                                _dl_start_final (/usr/lib64/ld-2.17.so)
                                _dl_start (/usr/lib64/ld-2.17.so)
                                _start (/usr/lib64/ld-2.17.so)
     0.196 ( 0.008 ms): ls/9109 access(filename: 0x9f998b70, mode: R
                                do_syscall_trace_leave ([kernel.kallsyms])
                                [0] ([unknown])

Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Fixes: bd3dda9ab0fb ("perf trace: Allow overriding global --max-stack per event")
Link: http://lkml.kernel.org/r/20180130053053.13214-3-ravi.bangoria@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2018-02-05 13:53:45 -03:00

accounting

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

arch

tools headers: Synchoronize x86 features UAPI headers

2018-02-02 17:22:12 -03:00

bpf

tools: bpftool: protect against races with disappearing objects

2017-12-23 01:09:52 +01:00

build

perf tools: Integrating the CoreSight decoding library