From 0a27d7f9f417c0305f7efa70631764a53c7af219 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Fri, 14 Jan 2011 15:50:51 -0200 Subject: [PATCH] perf record: Use perf_evlist__mmap There is more stuff that can go to the perf_ev{sel,list} layer, like detecting if sample_id_all is available, etc, but lets try using this in 'perf test' first. Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Mike Galbraith Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Tom Zanussi LKML-Reference: Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-record.c | 59 +++++++------------------------------ 1 file changed, 11 insertions(+), 48 deletions(-) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 109f3b269ac5..45a3689f9ed6 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -30,6 +30,7 @@ #include #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) +#define SID(e, x, y) xyarray__entry(e->id, x, y) enum write_mode_t { WRITE_FORCE, @@ -78,8 +79,6 @@ static off_t post_processing_offset; static struct perf_session *session; static const char *cpu_list; -static struct perf_mmap mmap_array[MAX_NR_CPUS]; - static void advance_output(size_t size) { bytes_written += size; @@ -196,20 +195,14 @@ static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int n return h_attr; } -static void create_counter(struct perf_evlist *evlist, - struct perf_evsel *evsel, int cpu) +static void create_counter(struct perf_evsel *evsel, int cpu) { char *filter = evsel->filter; struct perf_event_attr *attr = &evsel->attr; struct perf_header_attr *h_attr; + struct perf_sample_id *sid; int thread_index; int ret; - struct { - u64 count; - u64 time_enabled; - u64 time_running; - u64 id; - } read_data; for (thread_index = 0; thread_index < threads->nr; thread_index++) { h_attr = get_header_attr(attr, evsel->idx); @@ -223,45 +216,12 @@ static void create_counter(struct perf_evlist *evlist, } } - if (read(FD(evsel, cpu, thread_index), &read_data, sizeof(read_data)) == -1) { - perror("Unable to read perf file descriptor"); - exit(-1); - } - - if (perf_header_attr__add_id(h_attr, read_data.id) < 0) { + sid = SID(evsel, cpu, thread_index); + if (perf_header_attr__add_id(h_attr, sid->id) < 0) { pr_warning("Not enough memory to add id\n"); exit(-1); } - assert(FD(evsel, cpu, thread_index) >= 0); - fcntl(FD(evsel, cpu, thread_index), F_SETFL, O_NONBLOCK); - - if (evsel->idx || thread_index) { - struct perf_evsel *first; - first = list_entry(evlist->entries.next, struct perf_evsel, node); - ret = ioctl(FD(evsel, cpu, thread_index), - PERF_EVENT_IOC_SET_OUTPUT, - FD(first, cpu, 0)); - if (ret) { - error("failed to set output: %d (%s)\n", errno, - strerror(errno)); - exit(-1); - } - } else { - mmap_array[cpu].prev = 0; - mmap_array[cpu].mask = mmap_pages*page_size - 1; - mmap_array[cpu].base = mmap(NULL, (mmap_pages+1)*page_size, - PROT_READ | PROT_WRITE, MAP_SHARED, FD(evsel, cpu, thread_index), 0); - if (mmap_array[cpu].base == MAP_FAILED) { - error("failed to mmap with %d (%s)\n", errno, strerror(errno)); - exit(-1); - } - - evlist->pollfd[evlist->nr_fds].fd = FD(evsel, cpu, thread_index); - evlist->pollfd[evlist->nr_fds].events = POLLIN; - evlist->nr_fds++; - } - if (filter != NULL) { ret = ioctl(FD(evsel, cpu, thread_index), PERF_EVENT_IOC_SET_FILTER, filter); @@ -423,9 +383,12 @@ try_again: } } + if (perf_evlist__mmap(evlist, cpus, threads, mmap_pages, false) < 0) + die("failed to mmap with %d (%s)\n", errno, strerror(errno)); + for (cpu = 0; cpu < cpus->nr; ++cpu) { list_for_each_entry(pos, &evlist->entries, node) - create_counter(evlist, pos, cpu); + create_counter(pos, cpu); } } @@ -502,8 +465,8 @@ static void mmap_read_all(void) int i; for (i = 0; i < cpus->nr; i++) { - if (mmap_array[i].base) - mmap_read(&mmap_array[i]); + if (evsel_list->mmap[i].base) + mmap_read(&evsel_list->mmap[i]); } if (perf_header__has_feat(&session->header, HEADER_TRACE_INFO)) -- 2.20.1