kernel/linux.git/tools/perf/util/tp_pmu.c, branch v7.1

perf tp_pmu: Address const-correctness errors in recent glibcs

2026-01-27T05:22:00+00:00

To avoid having more variables, just cast the const variable searched to non-const since the result will not be modified, its only later that that variable will be used to modify something, but then its non-const memory being modified, so using a cast is the cheapest thing here. Signed-off-by: Arnaldo Carvalho de Melo

perf tp_pmu: Remove unnecessary check

2025-09-03T15:34:55+00:00

The "if" condition is also part of the "while" condition, remove the "if" to reduce the amount of code. Reported-by: Howard Chu Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Chun-Tse Shao Cc: Collin Funk Cc: Dr. David Alan Gilbert Cc: Gautam Menghani Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Thomas Falcon Cc: Thomas Richter Cc: Tiezhu Yang Cc: Weilin Wang Cc: Xu Yang Link: https://lore.kernel.org/r/20250819013941.209033-12-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf tp_pmu: Add event APIs

2025-07-26T23:31:43+00:00

Add event APIs for the tracepoint PMU allowing things like perf list to function using it. For perf list add the tracepoint format in the long description (shown with -v). $ sudo perf list -v tracepoint List of pre-defined events (to be used in -e or -M): alarmtimer:alarmtimer_cancel [Tracepoint event] [name: alarmtimer_cancel ID: 416 format: field:unsigned short common_type; offset:0; size:2; signed:0; field:unsigned char common_flags; offset:2; size:1; signed:0; field:unsigned char common_preempt_count; offset:3; size:1; signed:0; field:int common_pid; offset:4; size:4; signed:1; field:void * alarm; offset:8; size:8; signed:0; field:unsigned char alarm_type; offset:16; size:1; signed:0; field:s64 expires; offset:24; size:8; signed:1; field:s64 now; offset:32; size:8; signed:1; print fmt: "alarmtimer:%p type:%s expires:%llu now:%llu",REC->alarm,__print_flags((1 << REC->alarm_type)," | ",{ 1 << 0, "REALTIME" },{ 1 << 1,"BOOTTIME" },{ 1 << 3,"REALTIME Freezer" },{ 1 << 4,"BOOTTIME Freezer" }),REC->expires,REC->now . Unit: tracepoint] alarmtimer:alarmtimer_fired [Tracepoint event] [name: alarmtimer_fired ID: 418 ... Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Link: https://lore.kernel.org/r/20250725185202.68671-6-irogers@google.com Signed-off-by: Namhyung Kim

perf tp_pmu: Factor existing tracepoint logic to new file

2025-07-26T23:31:43+00:00

Start the creation of a tracepoint PMU abstraction. Tracepoint events don't follow the regular sysfs perf conventions. Eventually the new PMU abstraction will bridge the gap so tracepoint events look more like regular perf ones. Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Link: https://lore.kernel.org/r/20250725185202.68671-5-irogers@google.com Signed-off-by: Namhyung Kim