linux/tools/perf/tests, branch v3.19

perf test: Fix dwarf unwind using libunwind.

2015-01-16T20:49:29Z

Perf tool fails to unwind user stack if the event raises in a shared object. This patch improves tests/dwarf-unwind.c to demonstrate the problem by utilizing commonly used glibc function "bsearch". If perf is not statically linked, the testcase will try to unwind a mixed call trace. By debugging libunwind I found that there is a bug in unwind-libunwind: it always passes 0 as segbase to libunwind, cause libunwind unable to locate debug_frame entry fir first level ip address (I add some more debugging output into libunwind to make things clear): >_Uarm_dwarf_find_debug_frame: start_ip = 10be98, end_ip = 10c2a4 >_Uarm_dwarf_find_debug_frame: found debug_frame table `/lib/libc-2.18.so': segbase=0x0, len=7, gp=0x0, table_data=0x449388 >_Uarm_dwarf_search_unwind_table: call lookup:ip = b6cd3bcc, segbase = 0, rel_ip = b6cd3bcc >lookup: e->start_ip_offset = bcf18 (rel_ip = b6cd3bcc) >lookup: e->start_ip_offset = 6d314 (rel_ip = b6cd3bcc) >lookup: e->start_ip_offset = 33d0c (rel_ip = b6cd3bcc) ... >lookup: e->start_ip_offset = 15d0c (rel_ip = b6cd3bcc) >lookup: e->start_ip_offset = 15c40 (rel_ip = b6cd3bcc) >_Uarm_dwarf_search_unwind_table: IP b6cd3bcc inside range b6c12000-b6d4c000, but no explicit unwind info found >put_rs_cache: unmasking signals/interrupts and releasing lock >_Uarm_dwarf_step: returning -10 >_Uarm_step: dwarf_step()=-10 This patch passes map->start as segbase to dwarf_find_debug_frame(), so di will be initialized correctly. In addition, dso and executable are different when setting segbase. This patch first check whether the elf is executable, and pass segbase only for shared object. Signed-off-by: Wang Nan Acked-by: Jiri Olsa Cc: Ingo Molnar Cc: Jiri Olsa Cc: Li Zefan Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1421203007-75799-1-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

perf hists: Fix children sort key behavior

2015-01-08T14:26:56Z

When perf report --children resorts output fields, it tries to put caller above the callee. But this was only meaningful for a same thread and doing this requires callchain enabled. So fix its check before comparing the callchain depth. This also changes the hist accumulation tests: In test 3, xmalloc in bash thread should be above than other perf threads due to alphabetical order of comm string. Also it's under page_fault in bash thread since alphabetical order of dso name. The sys_perf_event_open in perf thread is put on the last line since it's self overhead is 0. In test 4, the sys_perf_event_open is put above other perf entries that have same children overhead since its callchain depth is smaller. Signed-off-by: Namhyung Kim Cc: Adrian Hunter Cc: David Ahern Cc: Ingo Molnar Cc: Jiri Olsa Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1419309381-2593-1-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf report: Show progress bar for output resorting

2014-12-23T15:01:37Z

Sometimes it takes a long time to resort hist entries for output in case of a large data file. Show a progress bar window and inform user. Signed-off-by: Namhyung Kim Cc: Adrian Hunter Cc: David Ahern Cc: Ingo Molnar Cc: Jiri Olsa Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1419223455-4362-3-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tests: Fix attr tests size values to cope with machine state on interrupt ABI changes

2014-12-09T14:02:43Z

Following change adjusted 'struct perf_event_attr', but let the attr test's sizes untouched: 60e2364e60e8 perf: Add ability to sample machine state on interrupt [jolsa@krava perf]$ ./perf test attr -vv --- start --- test child forked, pid 9719 running './tests/attr/test-stat-group1' 'PERF_TEST_ATTR=/tmp/tmp4drvul ./perf stat -o /tmp/tmp4drvul/perf.data -e '{cycles,instructions}' kill >/dev/null 2>&1' ret 1 expected size=96, got 104 FAILED './tests/attr/test-stat-group1' - match failure Adjusting test size values for attr test. Reported-by: Arnaldo Carvalho de Melo Signed-off-by: Jiri Olsa Cc: Andi Kleen Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/20141209135301.GC6784@krava.brq.redhat.com Signed-off-by: Arnaldo Carvalho de Melo

perf test: fix typo in python test

2014-11-19T15:33:47Z

Library loading in python syntax should be 'import perf', not 'use perf'. Signed-off-by: WANG Chao Cc: Adrian Hunter Cc: Ingo Molnar Cc: Jean Pihet Cc: Jiri Olsa Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1415780826-13250-1-git-send-email-chaowang@redhat.com Signed-off-by: Arnaldo Carvalho de Melo

perf/tests: Add interrupted state sample parsing test

2014-11-16T10:42:01Z

This patch updates the sample parsing test with support for the sampling of machine interrupted state. The patch modifies the do_test() code to sahred the sample regts bitmask between user and intr regs. Signed-off-by: Stephane Eranian Signed-off-by: Peter Zijlstra (Intel) Cc: cebbert.lkml@gmail.com Cc: Arnaldo Carvalho de Melo Cc: Borislav Petkov Cc: Jean Pihet Cc: Jiri Olsa Cc: Linus Torvalds Cc: Rusty Russell Link: http://lkml.kernel.org/r/1411559322-16548-5-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar

perf tests: Use thread->mg->machine

2014-10-29T12:32:47Z

Instead of passing both thread and machine. Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Don Zickus Cc: Frederic Weisbecker Cc: Jean Pihet Cc: Jiri Olsa Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-y2nl2v7p7of0dzuyc3tppxoo@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tests: Remove misplaced __maybe_unused

2014-10-29T12:32:46Z

The 'machine' parameter is used in this function, ditch the __maybe_unused annotation, not needed. Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Don Zickus Cc: Frederic Weisbecker Cc: Jean Pihet Cc: Jiri Olsa Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-dme1nsu07a0spkmcl401srec@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf callchains: Use thread->mg->machine

2014-10-29T12:32:46Z

The unwind__get_entries() already receives the thread parameter, from where it can obtain the matching machine structure, shorten the signature. Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Don Zickus Cc: Frederic Weisbecker Cc: Jean Pihet Cc: Jiri Olsa Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-isjc6bm8mv4612mhi6af64go@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: A thread's machine can be found via thread->mg->machine

2014-10-29T12:32:46Z

So stop passing both machine and thread to several thread methods, reducing function signature length. Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Don Zickus Cc: Frederic Weisbecker Cc: Jean Pihet Cc: Jiri Olsa Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-ckcy19dcp1jfkmdihdjcqdn1@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo