Commit 9a1e1065 authored by Kyle Meyer's avatar Kyle Meyer Committed by Arnaldo Carvalho de Melo
Browse files

perf: Increase MAX_NR_CPUS to 4096 



Systems have surpassed 2048 CPUs. Increase MAX_NR_CPUS to 4096.

Bitmaps declared with MAX_NR_CPUS bits will increase from 256B to 512B,
cpus_runtime will increase from 81960B to 163880B, and max_entries will
increase from 8192B to 16384B.

Reviewed-by: default avatarIan Rogers <irogers@google.com>
Reviewed-by: default avatarLeo Yan <leo.yan@arm.com>
Signed-off-by: default avatarKyle Meyer <kyle.meyer@hpe.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ben Gainey <ben.gainey@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20241206044035.1062032-2-irogers@google.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 9e7a00ec

tools/lib/perf/include/internal/cpumap.h

+1 −1
Original line number Diff line number Diff line
@@ -22,7 +22,7 @@ DECLARE_RC_STRUCT(perf_cpu_map) { 
};



#ifndef MAX_NR_CPUS

#define MAX_NR_CPUS	2048

#define MAX_NR_CPUS	4096

#endif



struct perf_cpu_map *perf_cpu_map__alloc(int nr_cpus);

tools/perf/perf.h

+1 −1
Original line number Diff line number Diff line
@@ -3,7 +3,7 @@ 
#define _PERF_PERF_H



#ifndef MAX_NR_CPUS

#define MAX_NR_CPUS			2048

#define MAX_NR_CPUS			4096

#endif



enum perf_affinity {

tools/perf/util/bpf_skel/kwork_top.bpf.c

+3 −1
Original line number Diff line number Diff line
@@ -18,7 +18,9 @@ enum kwork_class_type { 
};



#define MAX_ENTRIES     102400

#define MAX_NR_CPUS     2048

#ifndef MAX_NR_CPUS

#define MAX_NR_CPUS     4096

#endif

#define PF_KTHREAD      0x00200000

#define MAX_COMMAND_LEN 16