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8384a2600c
Use struct mmap_cpu_mask type for the tool's thread and mmap data buffers to overcome current 1024 CPUs mask size limitation of cpu_set_t type. Currently glibc's cpu_set_t type has an internal mask size limit of 1024 CPUs. Moving to the 'struct mmap_cpu_mask' type allows overcoming that limit. The tools bitmap API is used to manipulate objects of 'struct mmap_cpu_mask' type. Committer notes: To print the 'nbits' struct member we must use %zd, since it is a size_t, this fixes the build in some toolchains/arches. Reported-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/96d7e2ff-ce8b-c1e0-d52c-aa59ea96f0ea@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
#ifndef __PERF_MMAP_H
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#define __PERF_MMAP_H 1
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#include <internal/mmap.h>
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#include <linux/compiler.h>
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#include <linux/refcount.h>
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#include <linux/types.h>
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#include <linux/ring_buffer.h>
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#include <stdbool.h>
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#include <pthread.h> // for cpu_set_t
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#ifdef HAVE_AIO_SUPPORT
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#include <aio.h>
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#endif
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#include "auxtrace.h"
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#include "event.h"
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struct aiocb;
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struct mmap_cpu_mask {
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unsigned long *bits;
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size_t nbits;
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};
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#define MMAP_CPU_MASK_BYTES(m) \
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(BITS_TO_LONGS(((struct mmap_cpu_mask *)m)->nbits) * sizeof(unsigned long))
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/**
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* struct mmap - perf's ring buffer mmap details
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*
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* @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
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*/
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struct mmap {
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struct perf_mmap core;
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struct auxtrace_mmap auxtrace_mmap;
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#ifdef HAVE_AIO_SUPPORT
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struct {
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void **data;
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struct aiocb *cblocks;
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struct aiocb **aiocb;
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int nr_cblocks;
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} aio;
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#endif
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struct mmap_cpu_mask affinity_mask;
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void *data;
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int comp_level;
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};
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struct mmap_params {
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struct perf_mmap_param core;
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int nr_cblocks, affinity, flush, comp_level;
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struct auxtrace_mmap_params auxtrace_mp;
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};
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int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
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void mmap__munmap(struct mmap *map);
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union perf_event *perf_mmap__read_forward(struct mmap *map);
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int perf_mmap__push(struct mmap *md, void *to,
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int push(struct mmap *map, void *to, void *buf, size_t size));
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size_t mmap__mmap_len(struct mmap *map);
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void mmap_cpu_mask__scnprintf(struct mmap_cpu_mask *mask, const char *tag);
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#endif /*__PERF_MMAP_H */
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