From 594ac61ad3be9c80c738a9fe3bb95c05d8d1bae1 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Thu, 13 Dec 2012 13:13:07 -0300 Subject: [PATCH] perf evsel: Do missing feature fallbacks in just one place Instead of doing it in stat, top, record or any other tool that opens event descriptors. Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-vr8hzph83d5t2mdlkf565h84@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-record.c | 36 ------------------------------------ tools/perf/builtin-stat.c | 30 +++--------------------------- tools/perf/builtin-top.c | 20 -------------------- tools/perf/perf.h | 2 -- tools/perf/util/evsel.c | 31 ++++++++++++++++++++++++++++--- tools/perf/util/top.h | 2 -- 6 files changed, 31 insertions(+), 90 deletions(-) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 028de726b832..a4b97269cfc6 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -234,25 +234,6 @@ static int perf_record__open(struct perf_record *rec) list_for_each_entry(pos, &evlist->entries, node) { struct perf_event_attr *attr = &pos->attr; - /* - * Check if parse_single_tracepoint_event has already asked for - * PERF_SAMPLE_TIME. - * - * XXX this is kludgy but short term fix for problems introduced by - * eac23d1c that broke 'perf script' by having different sample_types - * when using multiple tracepoint events when we use a perf binary - * that tries to use sample_id_all on an older kernel. - * - * We need to move counter creation to perf_session, support - * different sample_types, etc. - */ - bool time_needed = attr->sample_type & PERF_SAMPLE_TIME; - -fallback_missing_features: - if (opts->exclude_guest_missing) - attr->exclude_guest = attr->exclude_host = 0; -retry_sample_id: - attr->sample_id_all = opts->sample_id_all_missing ? 0 : 1; try_again: if (perf_evsel__open(pos, evlist->cpus, evlist->threads) < 0) { int err = errno; @@ -266,23 +247,6 @@ try_again: " an out-of-range profile CPU?\n"); rc = -err; goto out; - } else if (err == EINVAL) { - if (!opts->exclude_guest_missing && - (attr->exclude_guest || attr->exclude_host)) { - pr_debug("Old kernel, cannot exclude " - "guest or host samples.\n"); - opts->exclude_guest_missing = true; - goto fallback_missing_features; - } else if (!opts->sample_id_all_missing) { - /* - * Old kernel, no attr->sample_id_type_all field - */ - opts->sample_id_all_missing = true; - if (!opts->sample_time && !opts->raw_samples && !time_needed) - perf_evsel__reset_sample_bit(pos, TIME); - - goto retry_sample_id; - } } /* diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index c12655af2b88..ef067c193f93 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -132,8 +132,6 @@ static struct stats walltime_nsecs_stats; static int create_perf_stat_counter(struct perf_evsel *evsel) { struct perf_event_attr *attr = &evsel->attr; - bool exclude_guest_missing = false; - int ret; if (scale) attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | @@ -141,16 +139,8 @@ static int create_perf_stat_counter(struct perf_evsel *evsel) attr->inherit = !no_inherit; -retry: - if (exclude_guest_missing) - evsel->attr.exclude_guest = evsel->attr.exclude_host = 0; - - if (perf_target__has_cpu(&target)) { - ret = perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel)); - if (ret) - goto check_ret; - return 0; - } + if (perf_target__has_cpu(&target)) + return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel)); if (!perf_target__has_task(&target) && perf_evsel__is_group_leader(evsel)) { @@ -158,21 +148,7 @@ retry: attr->enable_on_exec = 1; } - ret = perf_evsel__open_per_thread(evsel, evsel_list->threads); - if (!ret) - return 0; - /* fall through */ -check_ret: - if (ret && errno == EINVAL) { - if (!exclude_guest_missing && - (evsel->attr.exclude_guest || evsel->attr.exclude_host)) { - pr_debug("Old kernel, cannot exclude " - "guest or host samples.\n"); - exclude_guest_missing = true; - goto retry; - } - } - return ret; + return perf_evsel__open_per_thread(evsel, evsel_list->threads); } /* diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index b7d2ea62dbc6..74fca619fc4e 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -900,12 +900,6 @@ static void perf_top__start_counters(struct perf_top *top) list_for_each_entry(counter, &evlist->entries, node) { struct perf_event_attr *attr = &counter->attr; - -fallback_missing_features: - if (top->exclude_guest_missing) - attr->exclude_guest = attr->exclude_host = 0; -retry_sample_id: - attr->sample_id_all = top->sample_id_all_missing ? 0 : 1; try_again: if (perf_evsel__open(counter, top->evlist->cpus, top->evlist->threads) < 0) { @@ -914,20 +908,6 @@ try_again: if (err == EPERM || err == EACCES) { ui__error_paranoid(); goto out_err; - } else if (err == EINVAL) { - if (!top->exclude_guest_missing && - (attr->exclude_guest || attr->exclude_host)) { - pr_debug("Old kernel, cannot exclude " - "guest or host samples.\n"); - top->exclude_guest_missing = true; - goto fallback_missing_features; - } else if (!top->sample_id_all_missing) { - /* - * Old kernel, no attr->sample_id_type_all field - */ - top->sample_id_all_missing = true; - goto retry_sample_id; - } } /* * If it's cycles then fall back to hrtimer diff --git a/tools/perf/perf.h b/tools/perf/perf.h index 2c340e7da458..7622f15bcfb7 100644 --- a/tools/perf/perf.h +++ b/tools/perf/perf.h @@ -237,8 +237,6 @@ struct perf_record_opts { bool raw_samples; bool sample_address; bool sample_time; - bool sample_id_all_missing; - bool exclude_guest_missing; bool period; unsigned int freq; unsigned int mmap_pages; diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 7a2a3dc3ff03..ee6ee3f45c2a 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -22,6 +22,11 @@ #include #include "perf_regs.h" +static struct { + bool sample_id_all; + bool exclude_guest; +} perf_missing_features; + #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) static int __perf_evsel__sample_size(u64 sample_type) @@ -463,7 +468,7 @@ void perf_evsel__config(struct perf_evsel *evsel, struct perf_event_attr *attr = &evsel->attr; int track = !evsel->idx; /* only the first counter needs these */ - attr->sample_id_all = opts->sample_id_all_missing ? 0 : 1; + attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1; attr->inherit = !opts->no_inherit; perf_evsel__set_sample_bit(evsel, IP); @@ -513,7 +518,7 @@ void perf_evsel__config(struct perf_evsel *evsel, if (opts->period) perf_evsel__set_sample_bit(evsel, PERIOD); - if (!opts->sample_id_all_missing && + if (!perf_missing_features.sample_id_all && (opts->sample_time || !opts->no_inherit || perf_target__has_cpu(&opts->target))) perf_evsel__set_sample_bit(evsel, TIME); @@ -761,6 +766,13 @@ static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, pid = evsel->cgrp->fd; } +fallback_missing_features: + if (perf_missing_features.exclude_guest) + evsel->attr.exclude_guest = evsel->attr.exclude_host = 0; +retry_sample_id: + if (perf_missing_features.sample_id_all) + evsel->attr.sample_id_all = 0; + for (cpu = 0; cpu < cpus->nr; cpu++) { for (thread = 0; thread < threads->nr; thread++) { @@ -777,13 +789,26 @@ static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, group_fd, flags); if (FD(evsel, cpu, thread) < 0) { err = -errno; - goto out_close; + goto try_fallback; } } } return 0; +try_fallback: + if (err != -EINVAL || cpu > 0 || thread > 0) + goto out_close; + + if (!perf_missing_features.exclude_guest && + (evsel->attr.exclude_guest || evsel->attr.exclude_host)) { + perf_missing_features.exclude_guest = true; + goto fallback_missing_features; + } else if (!perf_missing_features.sample_id_all) { + perf_missing_features.sample_id_all = true; + goto retry_sample_id; + } + out_close: do { while (--thread >= 0) { diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h index 927c229c2d9a..7ebf357dc9e1 100644 --- a/tools/perf/util/top.h +++ b/tools/perf/util/top.h @@ -29,8 +29,6 @@ struct perf_top { bool sort_has_symbols; bool kptr_restrict_warned; bool vmlinux_warned; - bool sample_id_all_missing; - bool exclude_guest_missing; bool dump_symtab; struct hist_entry *sym_filter_entry; struct perf_evsel *sym_evsel; -- 2.20.1