kernel/linux.git/tools/perf/ui/browsers, branch v5.9.2

perf top/report: Fix infinite loop in the TUI for grouped events

2020-09-01T15:15:52+00:00

For a while we need to have a dummy event for doing things like receiving PERF_RECORD_COMM, PERF_RECORD_EXEC, etc for threads being created and dying while we synthesize the pre-existing ones at tool start. This 'dummy' event is needed for keeping track of thread lifetime events early in the session but are uninteresting otherwise, i.e. no need to have it in a initial events menu for the non-grouped case, i.e. for: # perf top -e cycles,instructions or even for plain: # perf top When 'cycles' and that 'dummy' event are in place. The code to remove that 'dummy' event ended up creating an endless loop for the grouped case, i.e.: # perf top -e '{cycles,instructions}' Fix it. Fixes: bee9ca1c8a237ca1 ("perf report TUI: Remove needless 'dummy' event from menu") Cc: Adrian Hunter Cc: Ian Rogers Cc: Jiri Olsa Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo

Merge remote-tracking branch 'torvalds/master' into perf/core

2020-07-08T16:49:15+00:00

To pick up fixes and move perf/core forward, minor conflict as perf_evlist__add_dummy() lost its 'perf_' prefix as it operates on a 'struct evlist', not on a 'struct perf_evlist', i.e. its tools/perf/ specific, it is not in libperf. Signed-off-by: Arnaldo Carvalho de Melo

perf report TUI: Remove needless 'dummy' event from menu

2020-07-06T12:24:02+00:00

Fixing the common case of: perf record perf report And getting just the cycles events. We now have a 'dummy' event to get perf metadata events that take place while we synthesize metadata records for pre-existing processes by traversing procfs, so we always have this extra 'dummy' evsel, but we don't have to offer it as there will be no samples on it, remove this distraction. Cc: Adrian Hunter Cc: Ian Rogers Cc: Jiri Olsa Cc: Namhyung Kim Link: https://lore.kernel.org/lkml/20200706115452.GA2772@redhat.com/ Signed-off-by: Arnaldo Carvalho de Melo

perf report TUI: Fix segmentation fault in perf_evsel__hists_browse()

2020-07-06T12:03:39+00:00

The segmentation fault can be reproduced as following steps: 1) Executing perf report in tui. 2) Typing '/xxxxx' to filter the symbol to get nothing matched. 3) Pressing enter with no entry selected. Then it will report a segmentation fault. It is caused by the lack of check of browser->he_selection when accessing it's member res_samples in perf_evsel__hists_browse(). These processes are meaningful for specified samples, so we can skip these when nothing is selected. Fixes: 4968ac8fb7c3 ("perf report: Implement browsing of individual samples") Signed-off-by: Wei Li Acked-by: Jiri Olsa Acked-by: Namhyung Kim Tested-by: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Andi Kleen Cc: Hanjun Guo Cc: Jin Yao Cc: Mark Rutland Link: http://lore.kernel.org/lkml/20200612094322.39565-1-liwei391@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

perf annotate: Remove unneeded conversion to bool

2020-06-22T19:28:08+00:00

The '>' expression itself is bool, no need to convert it to bool again. This fixes the following coccicheck warning: tools/perf/ui/browsers/annotate.c:212:30-35: WARNING: conversion to bool not needed here Signed-off-by: Jason Yan Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20200420123528.11655-1-yanaijie@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

perf evsel: Rename perf_evsel{prev,next}() to evsel{prev,next}()

2020-05-05T19:35:31+00:00

As those are 'struct evsel' methods, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter Cc: Jiri Olsa Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo

perf evsel: Rename perf_evsel__is_() to evsel__is()

2020-05-05T19:35:31+00:00

perf evsel: Rename perf_evselname() to evselname()

2020-05-05T19:35:30+00:00

As they are 'struct evsel' methods or related routines, not part of tools/lib/perf/, aka libperf, to whom the perf_ prefix belongs. Cc: Adrian Hunter Cc: Jiri Olsa Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo

perf report/top TUI: Fix title line formatting

2020-04-03T12:37:55+00:00

In d10ec006dcd7 ("perf hists browser: Allow passing an initial hotkey") the hist_entry__title() call was cut'n'pasted to a function where the 'title' variable is a pointer, not an array, so the sizeof(title) continues syntactically valid but ends up reducing the real size of the buffer where to format the first line in the screen to 8 bytes, which makes the formatting at the title at each refresh to produce just the string "Samples ", duh, fix it by passing the size of the buffer. Cc: Adrian Hunter Cc: Jin Yao Cc: Jiri Olsa Cc: Namhyung Kim Fixes: d10ec006dcd7 ("perf hists browser: Allow passing an initial hotkey") Link: http://lore.kernel.org/lkml/20200330154314.GB4576@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf report/top TUI: Support hotkeys to let user select any event for sorting

2020-03-24T12:37:27+00:00

When performing "perf report --group", it shows the event group information together. In previous patch, we have supported a new option "--group-sort-idx" to sort the output by the event at the index n in event group. It would be nice if we can use a hotkey in browser to select a event to sort. For example, # perf report --group Samples: 12K of events 'cpu/instructions,period=2000003/, cpu/cpu-cycles,period=200003/, ... Overhead Command Shared Object Symbol 92.19% 98.68% 0.00% 93.30% mgen mgen [.] LOOP1 3.12% 0.29% 0.00% 0.16% gsd-color libglib-2.0.so.0.5600.4 [.] 0x0000000000049515 1.56% 0.03% 0.00% 0.04% gsd-color libglib-2.0.so.0.5600.4 [.] 0x00000000000494b7 1.56% 0.01% 0.00% 0.00% gsd-color libglib-2.0.so.0.5600.4 [.] 0x00000000000494ce 1.56% 0.00% 0.00% 0.00% mgen [kernel.kallsyms] [k] task_tick_fair 0.00% 0.15% 0.00% 0.04% perf [kernel.kallsyms] [k] smp_call_function_single 0.00% 0.13% 0.00% 6.08% swapper [kernel.kallsyms] [k] intel_idle 0.00% 0.03% 0.00% 0.00% gsd-color libglib-2.0.so.0.5600.4 [.] g_main_context_check 0.00% 0.03% 0.00% 0.00% swapper [kernel.kallsyms] [k] apic_timer_interrupt 0.00% 0.03% 0.00% 0.00% swapper [kernel.kallsyms] [k] check_preempt_curr When user press hotkey '3' (event index, starting from 0), it indicates to sort output by the forth event in group. Samples: 12K of events 'cpu/instructions,period=2000003/, cpu/cpu-cycles,period=200003/, ... Overhead Command Shared Object Symbol 92.19% 98.68% 0.00% 93.30% mgen mgen [.] LOOP1 0.00% 0.13% 0.00% 6.08% swapper [kernel.kallsyms] [k] intel_idle 3.12% 0.29% 0.00% 0.16% gsd-color libglib-2.0.so.0.5600.4 [.] 0x0000000000049515 0.00% 0.00% 0.00% 0.06% swapper [kernel.kallsyms] [k] hrtimer_start_range_ns 1.56% 0.03% 0.00% 0.04% gsd-color libglib-2.0.so.0.5600.4 [.] 0x00000000000494b7 0.00% 0.15% 0.00% 0.04% perf [kernel.kallsyms] [k] smp_call_function_single 0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] update_curr 0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] apic_timer_interrupt 0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] native_apic_msr_eoi_write 0.00% 0.00% 0.00% 0.02% mgen [kernel.kallsyms] [k] __update_load_avg_se v6: --- Jiri provided a good improvement to eliminate unneeded refresh. This improvement is added to v6. v2: --- 1. Report warning at helpline when index is invalid. 2. Report warning at helpline when it's not group event. 3. Use "case '0' ... '9'" to refine the code 4. Split K_RELOAD implementation to another patch. Signed-off-by: Jin Yao Acked-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Andi Kleen Cc: Kan Liang Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20200220013616.19916-4-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo