From: Jiri Olsa <jo...@kernel.org> Move prev/start/end from tools/perf's mmap to libperf's perf_mmap struct.
Committer notes: Add linux/types.h as we use u64. Signed-off-by: Jiri Olsa <jo...@kernel.org> Cc: Alexander Shishkin <alexander.shish...@linux.intel.com> Cc: Michael Petlan <mpet...@redhat.com> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Link: http://lore.kernel.org/lkml/20190913132355.21634-16-jo...@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/lib/include/internal/mmap.h | 4 +++ tools/perf/util/mmap.c | 50 +++++++++++++------------- tools/perf/util/mmap.h | 3 -- 3 files changed, 29 insertions(+), 28 deletions(-) diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h index e6fb850ba47a..ebf5b93754fd 100644 --- a/tools/perf/lib/include/internal/mmap.h +++ b/tools/perf/lib/include/internal/mmap.h @@ -3,6 +3,7 @@ #define __LIBPERF_INTERNAL_MMAP_H #include <linux/refcount.h> +#include <linux/types.h> /** * struct perf_mmap - perf's ring buffer mmap details @@ -15,6 +16,9 @@ struct perf_mmap { int fd; int cpu; refcount_t refcnt; + u64 prev; + u64 start; + u64 end; }; #endif /* __LIBPERF_INTERNAL_MMAP_H */ diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c index d6406d216cfe..6ce70ff005cb 100644 --- a/tools/perf/util/mmap.c +++ b/tools/perf/util/mmap.c @@ -94,19 +94,19 @@ union perf_event *perf_mmap__read_event(struct mmap *map) /* non-overwirte doesn't pause the ringbuffer */ if (!map->overwrite) - map->end = perf_mmap__read_head(map); + map->core.end = perf_mmap__read_head(map); - event = perf_mmap__read(map, &map->start, map->end); + event = perf_mmap__read(map, &map->core.start, map->core.end); if (!map->overwrite) - map->prev = map->start; + map->core.prev = map->core.start; return event; } static bool perf_mmap__empty(struct mmap *map) { - return perf_mmap__read_head(map) == map->prev && !map->auxtrace_mmap.base; + return perf_mmap__read_head(map) == map->core.prev && !map->auxtrace_mmap.base; } void perf_mmap__get(struct mmap *map) @@ -125,7 +125,7 @@ void perf_mmap__put(struct mmap *map) void perf_mmap__consume(struct mmap *map) { if (!map->overwrite) { - u64 old = map->prev; + u64 old = map->core.prev; perf_mmap__write_tail(map, old); } @@ -368,7 +368,7 @@ int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu) * perf_evlist__filter_pollfd(). */ refcount_set(&map->core.refcnt, 2); - map->prev = 0; + map->core.prev = 0; map->core.mask = mp->mask; map->core.base = mmap(NULL, perf_mmap__mmap_len(map), mp->prot, MAP_SHARED, fd, 0); @@ -443,22 +443,22 @@ static int overwrite_rb_find_range(void *buf, int mask, u64 *start, u64 *end) static int __perf_mmap__read_init(struct mmap *md) { u64 head = perf_mmap__read_head(md); - u64 old = md->prev; + u64 old = md->core.prev; unsigned char *data = md->core.base + page_size; unsigned long size; - md->start = md->overwrite ? head : old; - md->end = md->overwrite ? old : head; + md->core.start = md->overwrite ? head : old; + md->core.end = md->overwrite ? old : head; - if ((md->end - md->start) < md->flush) + if ((md->core.end - md->core.start) < md->flush) return -EAGAIN; - size = md->end - md->start; + size = md->core.end - md->core.start; if (size > (unsigned long)(md->core.mask) + 1) { if (!md->overwrite) { WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n"); - md->prev = head; + md->core.prev = head; perf_mmap__consume(md); return -EAGAIN; } @@ -467,7 +467,7 @@ static int __perf_mmap__read_init(struct mmap *md) * Backward ring buffer is full. We still have a chance to read * most of data from it. */ - if (overwrite_rb_find_range(data, md->core.mask, &md->start, &md->end)) + if (overwrite_rb_find_range(data, md->core.mask, &md->core.start, &md->core.end)) return -EINVAL; } @@ -498,12 +498,12 @@ int perf_mmap__push(struct mmap *md, void *to, if (rc < 0) return (rc == -EAGAIN) ? 1 : -1; - size = md->end - md->start; + size = md->core.end - md->core.start; - if ((md->start & md->core.mask) + size != (md->end & md->core.mask)) { - buf = &data[md->start & md->core.mask]; - size = md->core.mask + 1 - (md->start & md->core.mask); - md->start += size; + if ((md->core.start & md->core.mask) + size != (md->core.end & md->core.mask)) { + buf = &data[md->core.start & md->core.mask]; + size = md->core.mask + 1 - (md->core.start & md->core.mask); + md->core.start += size; if (push(md, to, buf, size) < 0) { rc = -1; @@ -511,16 +511,16 @@ int perf_mmap__push(struct mmap *md, void *to, } } - buf = &data[md->start & md->core.mask]; - size = md->end - md->start; - md->start += size; + buf = &data[md->core.start & md->core.mask]; + size = md->core.end - md->core.start; + md->core.start += size; if (push(md, to, buf, size) < 0) { rc = -1; goto out; } - md->prev = head; + md->core.prev = head; perf_mmap__consume(md); out: return rc; @@ -529,8 +529,8 @@ int perf_mmap__push(struct mmap *md, void *to, /* * Mandatory for overwrite mode * The direction of overwrite mode is backward. - * The last perf_mmap__read() will set tail to map->prev. - * Need to correct the map->prev to head which is the end of next read. + * The last perf_mmap__read() will set tail to map->core.prev. + * Need to correct the map->core.prev to head which is the end of next read. */ void perf_mmap__read_done(struct mmap *map) { @@ -540,5 +540,5 @@ void perf_mmap__read_done(struct mmap *map) if (!refcount_read(&map->core.refcnt)) return; - map->prev = perf_mmap__read_head(map); + map->core.prev = perf_mmap__read_head(map); } diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h index 5febd22fbe2e..a3dd53f2bfb8 100644 --- a/tools/perf/util/mmap.h +++ b/tools/perf/util/mmap.h @@ -22,9 +22,6 @@ struct aiocb; */ struct mmap { struct perf_mmap core; - u64 prev; - u64 start; - u64 end; bool overwrite; struct auxtrace_mmap auxtrace_mmap; char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8); -- 2.21.0
