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perf mmap: Map data buffer for preserving collected data

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The map->data buffer is used to preserve map->base profiling data for
writing to disk. AIO map->cblock is used to queue corresponding
map->data buffer for asynchronous writing.

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/5fcda10c-6c63-68df-383a-c6d9e5d1f918@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Alexey Budankov
2018-11-06 12:03:35 +03:00
committed by Arnaldo Carvalho de Melo
parent 2a07d81474
commit 0b77383134
3 changed files with 59 additions and 3 deletions
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11
tools/perf/util/mmap.h
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@@ -6,6 +6,9 @@
#include <linux/types.h>
#include <linux/ring_buffer.h>
#include <stdbool.h>
#ifdef HAVE_AIO_SUPPORT
#include <aio.h>
#endif
#include "auxtrace.h"
#include "event.h"
@@ -26,6 +29,12 @@ struct perf_mmap {
bool overwrite;
struct auxtrace_mmap auxtrace_mmap;
char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
#ifdef HAVE_AIO_SUPPORT
struct {
void *data;
struct aiocb cblock;
} aio;
#endif
};
/*
@@ -57,7 +66,7 @@ enum bkw_mmap_state {
};
struct mmap_params {
int prot, mask;
int prot, mask, nr_cblocks;
struct auxtrace_mmap_params auxtrace_mp;
};