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Date: Wed, 10 Oct 2012 22:25:30 -0600
From: David Ahern <dsahern@...il.com>
To: acme@...stprotocols.net, linux-kernel@...r.kernel.org
Cc: mingo@...nel.org, peterz@...radead.org, fweisbec@...il.com,
David Ahern <dsahern@...il.com>
Subject: [PATCH 4/9] perf top: use the new perf_evlist__open_counters method
Remove open counters code with all the retry and error handling in
favor of the new perf_evlist__open_counters method which is based
on the top code.
Signed-off-by: David Ahern <dsahern@...il.com>
Cc: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Peter Zijlstra <peterz@...radead.org>
---
tools/perf/builtin-top.c | 70 ++--------------------------------------------
1 file changed, 3 insertions(+), 67 deletions(-)
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 33c3825..2ffc32e 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -919,75 +919,11 @@ static void perf_top__start_counters(struct perf_top *top)
attr->mmap = 1;
attr->comm = 1;
attr->inherit = !top->opts.no_inherit;
-fallback_missing_features:
- if (top->opts.exclude_guest_missing)
- attr->exclude_guest = attr->exclude_host = 0;
-retry_sample_id:
- attr->sample_id_all = top->opts.sample_id_all_missing ? 0 : 1;
-try_again:
- if (perf_evsel__open(counter, top->evlist->cpus,
- top->evlist->threads) < 0) {
- int err = errno;
-
- if (err == EPERM || err == EACCES) {
- ui__error_paranoid();
- goto out_err;
- } else if (err == EINVAL) {
- if (!top->opts.exclude_guest_missing &&
- (attr->exclude_guest || attr->exclude_host)) {
- pr_debug("Old kernel, cannot exclude "
- "guest or host samples.\n");
- top->opts.exclude_guest_missing = true;
- goto fallback_missing_features;
- } else if (!top->opts.sample_id_all_missing) {
- /*
- * Old kernel, no attr->sample_id_type_all field
- */
- top->opts.sample_id_all_missing = true;
- goto retry_sample_id;
- }
- }
- /*
- * If it's cycles then fall back to hrtimer
- * based cpu-clock-tick sw counter, which
- * is always available even if no PMU support:
- */
- if ((err == ENOENT || err == ENXIO) &&
- (attr->type == PERF_TYPE_HARDWARE) &&
- (attr->config == PERF_COUNT_HW_CPU_CYCLES)) {
-
- if (verbose)
- ui__warning("Cycles event not supported,\n"
- "trying to fall back to cpu-clock-ticks\n");
-
- attr->type = PERF_TYPE_SOFTWARE;
- attr->config = PERF_COUNT_SW_CPU_CLOCK;
- if (counter->name) {
- free(counter->name);
- counter->name = NULL;
- }
- goto try_again;
- }
-
- if (err == ENOENT) {
- ui__error("The %s event is not supported.\n",
- perf_evsel__name(counter));
- goto out_err;
- } else if (err == EMFILE) {
- ui__error("Too many events are opened.\n"
- "Try again after reducing the number of events\n");
- goto out_err;
- }
-
- ui__error("The sys_perf_event_open() syscall "
- "returned with %d (%s). /bin/dmesg "
- "may provide additional information.\n"
- "No CONFIG_PERF_EVENTS=y kernel support "
- "configured?\n", err, strerror(err));
- goto out_err;
- }
}
+ if (perf_evlist__open_counters(evlist, &top->opts) != 0)
+ goto out_err;
+
if (perf_evlist__mmap(evlist, top->opts.mmap_pages, false) < 0) {
ui__error("Failed to mmap with %d (%s)\n",
errno, strerror(errno));
--
1.7.10.1
--
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