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perf cpumap: Add range data encoding

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Often cpumaps encode a range of all CPUs, add a compact encoding that
doesn't require a bit mask or list of all CPUs.

Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Colin Ian King <colin.king@intel.com>
Cc: Dave Marchevsky <davemarchevsky@fb.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Gustavo A. R. Silva <gustavoars@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Kees Kook <keescook@chromium.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20220614143353.1559597-7-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers
2022-06-14 07:33:53 -07:00
committed by Arnaldo Carvalho de Melo
parent d773c999b8
commit c7202d20fb
5 changed files with 166 additions and 87 deletions
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tools/lib/perf/include/perf/event.h
+14
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@@ -153,6 +153,7 @@ struct perf_record_header_attr {
enum {
PERF_CPU_MAP__CPUS = 0,
PERF_CPU_MAP__MASK = 1,
PERF_CPU_MAP__RANGE_CPUS = 2,
};
/*
@@ -195,6 +196,17 @@ struct perf_record_mask_cpu_map64 {
#pragma GCC diagnostic ignored "-Wpacked"
#pragma GCC diagnostic ignored "-Wattributes"
/*
* An encoding of a CPU map for a range starting at start_cpu through to
* end_cpu. If any_cpu is 1, an any CPU (-1) value (aka dummy value) is present.
*/
struct perf_record_range_cpu_map {
__u8 any_cpu;
__u8 __pad;
__u16 start_cpu;
__u16 end_cpu;
};
struct __packed perf_record_cpu_map_data {
__u16 type;
union {
@@ -204,6 +216,8 @@ struct __packed perf_record_cpu_map_data {
struct perf_record_mask_cpu_map32 mask32_data;
/* Used when type == PERF_CPU_MAP__MASK and long_size == 8. */
struct perf_record_mask_cpu_map64 mask64_data;
/* Used when type == PERF_CPU_MAP__RANGE_CPUS. */
struct perf_record_range_cpu_map range_cpu_data;
};
};