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perf/core improvements and fixes:
User visible:
- perf trace --pf maj/min/all works with --call-graph: (Arnaldo Carvalho de Melo)
Tracing write syscalls and major page faults with callchains while starting
firefox, limiting the stack to 5 frames:
# perf trace -e write --pf maj --max-stack 5 firefox
589.549 ( 0.014 ms): firefox/15377 write(fd: 4, buf: 0x7fff80acc898, count: 151) = 151
[0xfaed] (/usr/lib64/libpthread-2.22.so)
fire_glxtest_process+0x5c (/usr/lib64/firefox/libxul.so)
InstallGdkErrorHandler+0x41 (/usr/lib64/firefox/libxul.so)
XREMain::XRE_mainInit+0x12c (/usr/lib64/firefox/libxul.so)
XREMain::XRE_main+0x1e4 (/usr/lib64/firefox/libxul.so)
760.704 ( 0.000 ms): firefox/15332 majfault [gtk_tree_view_accessible_get_type+0x0] => /usr/lib64/libgtk-3.so.0.1800.9@0xa0850 (x.)
gtk_tree_view_accessible_get_type+0x0 (/usr/lib64/libgtk-3.so.0.1800.9)
gtk_tree_view_class_intern_init+0x1a54 (/usr/lib64/libgtk-3.so.0.1800.9)
g_type_class_ref+0x6dd (/usr/lib64/libgobject-2.0.so.0.4600.2)
[0x115378] (/usr/lib64/libgnutls.so.30.6.3)
This automagically selects "--call-graph dwarf", use "--call-graph fp" on systems
where -fno-omit-frame-pointer was used to built the components of interest, to
incur in less overhead, or tune "--call-graph dwarf" appropriately, see 'perf record --help'.
- Allow /proc/sys/kernel/perf_event_max_stack, that defaults to the old hard coded value
of PERF_MAX_STACK_DEPTH (127), useful for huge callstacks for things like Groovy, Ruby, etc,
and also to reduce overhead by limiting it to a smaller value, upcoming work will allow
this to be done per-event (Arnaldo Carvalho de Melo)
- Make 'perf trace --min-stack' be honoured by --pf and --event (Arnaldo Carvalho de Melo)
- Make 'perf evlist -v' decode perf_event_attr->branch_sample_type (Arnaldo Carvalho de Melo)
# perf record --call lbr usleep 1
# perf evlist -v
cycles:ppp: ... sample_type: IP|TID|TIME|CALLCHAIN|PERIOD|BRANCH_STACK, ...
branch_sample_type: USER|CALL_STACK|NO_FLAGS|NO_CYCLES
#
- Clear dummy entry accumulated period, fixing such 'perf top/report' output
as: (Kan Liang)
4769.98% 0.01% 0.00% 0.01% tchain_edit [kernel] [k] update_fast_timekeeper
- System calls with pid_t arguments gets them augmented with the COMM event
more thoroughly:
# trace -e perf_event_open perf stat -e cycles -p 15608
6.876 ( 0.014 ms): perf_event_open(attr_uptr: 0x2ae20d8, pid: 15608 (hexchat), cpu: -1, group_fd: -1, flags: FD_CLOEXEC) = 3
6.882 ( 0.005 ms): perf_event_open(attr_uptr: 0x2ae20d8, pid: 15639 (gmain), cpu: -1, group_fd: -1, flags: FD_CLOEXEC) = 4
6.889 ( 0.005 ms): perf_event_open(attr_uptr: 0x2ae20d8, pid: 15640 (gdbus), cpu: -1, group_fd: -1, flags: FD_CLOEXEC) = 5
^^^^^^^^^^^^^^^^^^
^C
- Fix offline module name mismatch issue in 'perf probe' (Ravi Bangoria)
- Fix module probe issue if no dwarf support in (Ravi Bangoria)
Assorted fixes:
- Fix off-by-one in write_buildid() (Andrey Ryabinin)
- Fix segfault when printing callchains in 'perf script' (Chris Phlipot)
- Replace assignment with comparison on assert check in 'perf test' entry (Colin Ian King)
- Fix off-by-one comparison in intel-pt code (Colin Ian King)
- Close target file on error path in 'perf probe' (Masami Hiramatsu)
- Set default kprobe group name if not given in 'perf probe' (Masami Hiramatsu)
- Avoid partial perf_event_header reads (Wang Nan)
Infrastructure:
- Update x86's syscall_64.tbl copy, adding preadv2 & pwritev2 (Arnaldo Carvalho de Melo)
- Make the x86 clean quiet wrt syscall table removal (Jiri Olsa)
Cleanups:
- Simplify wrapper for LOCK_PI in 'perf bench futex' (Davidlohr Bueso)
- Remove duplicate const qualifier (Eric Engestrom)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo-20160427' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
User visible changes:
- perf trace --pf maj/min/all works with --call-graph: (Arnaldo Carvalho de Melo)
Tracing write syscalls and major page faults with callchains while starting
firefox, limiting the stack to 5 frames:
# perf trace -e write --pf maj --max-stack 5 firefox
589.549 ( 0.014 ms): firefox/15377 write(fd: 4, buf: 0x7fff80acc898, count: 151) = 151
[0xfaed] (/usr/lib64/libpthread-2.22.so)
fire_glxtest_process+0x5c (/usr/lib64/firefox/libxul.so)
InstallGdkErrorHandler+0x41 (/usr/lib64/firefox/libxul.so)
XREMain::XRE_mainInit+0x12c (/usr/lib64/firefox/libxul.so)
XREMain::XRE_main+0x1e4 (/usr/lib64/firefox/libxul.so)
760.704 ( 0.000 ms): firefox/15332 majfault [gtk_tree_view_accessible_get_type+0x0] => /usr/lib64/libgtk-3.so.0.1800.9@0xa0850 (x.)
gtk_tree_view_accessible_get_type+0x0 (/usr/lib64/libgtk-3.so.0.1800.9)
gtk_tree_view_class_intern_init+0x1a54 (/usr/lib64/libgtk-3.so.0.1800.9)
g_type_class_ref+0x6dd (/usr/lib64/libgobject-2.0.so.0.4600.2)
[0x115378] (/usr/lib64/libgnutls.so.30.6.3)
This automagically selects "--call-graph dwarf", use "--call-graph fp" on systems
where -fno-omit-frame-pointer was used to built the components of interest, to
incur in less overhead, or tune "--call-graph dwarf" appropriately, see 'perf record --help'.
- Allow /proc/sys/kernel/perf_event_max_stack, that defaults to the old hard coded value
of PERF_MAX_STACK_DEPTH (127), useful for huge callstacks for things like Groovy, Ruby, etc,
and also to reduce overhead by limiting it to a smaller value, upcoming work will allow
this to be done per-event (Arnaldo Carvalho de Melo)
- Make 'perf trace --min-stack' be honoured by --pf and --event (Arnaldo Carvalho de Melo)
- Make 'perf evlist -v' decode perf_event_attr->branch_sample_type (Arnaldo Carvalho de Melo)
# perf record --call lbr usleep 1
# perf evlist -v
cycles:ppp: ... sample_type: IP|TID|TIME|CALLCHAIN|PERIOD|BRANCH_STACK, ...
branch_sample_type: USER|CALL_STACK|NO_FLAGS|NO_CYCLES
#
- Clear dummy entry accumulated period, fixing such 'perf top/report' output
as: (Kan Liang)
4769.98% 0.01% 0.00% 0.01% tchain_edit [kernel] [k] update_fast_timekeeper
- System calls with pid_t arguments gets them augmented with the COMM event
more thoroughly:
# trace -e perf_event_open perf stat -e cycles -p 15608
6.876 ( 0.014 ms): perf_event_open(attr_uptr: 0x2ae20d8, pid: 15608 (hexchat), cpu: -1, group_fd: -1, flags: FD_CLOEXEC) = 3
6.882 ( 0.005 ms): perf_event_open(attr_uptr: 0x2ae20d8, pid: 15639 (gmain), cpu: -1, group_fd: -1, flags: FD_CLOEXEC) = 4
6.889 ( 0.005 ms): perf_event_open(attr_uptr: 0x2ae20d8, pid: 15640 (gdbus), cpu: -1, group_fd: -1, flags: FD_CLOEXEC) = 5
^^^^^^^^^^^^^^^^^^
^C
- Fix offline module name mismatch issue in 'perf probe' (Ravi Bangoria)
- Fix module probe issue if no dwarf support in (Ravi Bangoria)
Assorted fixes:
- Fix off-by-one in write_buildid() (Andrey Ryabinin)
- Fix segfault when printing callchains in 'perf script' (Chris Phlipot)
- Replace assignment with comparison on assert check in 'perf test' entry (Colin Ian King)
- Fix off-by-one comparison in intel-pt code (Colin Ian King)
- Close target file on error path in 'perf probe' (Masami Hiramatsu)
- Set default kprobe group name if not given in 'perf probe' (Masami Hiramatsu)
- Avoid partial perf_event_header reads (Wang Nan)
Infrastructure changes:
- Update x86's syscall_64.tbl copy, adding preadv2 & pwritev2 (Arnaldo Carvalho de Melo)
- Make the x86 clean quiet wrt syscall table removal (Jiri Olsa)
Cleanups:
- Simplify wrapper for LOCK_PI in 'perf bench futex' (Davidlohr Bueso)
- Remove duplicate const qualifier (Eric Engestrom)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar
commit
a8944c5bf8
49 changed files with 475 additions and 179 deletions
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