perf evlist: Remove __evlist__add_default

__evlist__add_default adds a cycles event to a typically empty evlist
and was extended for hybrid with evlist__add_default_hybrid, as more
than 1 PMU was necessary. Rather than have dedicated logic for the
cycles event, this change switches to parsing 'cycles:P' which will
handle wildcarding the PMUs appropriately for hybrid.

Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ali Saidi <alisaidi@amazon.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kang Minchul <tegongkang@gmail.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Ming Wang <wangming01@loongson.cn>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230527072210.2900565-14-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/arch/x86/util/evsel.c b/tools/perf/arch/x86/util/evsel.c
index ea3972d..153cdca 100644 (file)
--- a/tools/perf/arch/x86/util/evsel.c
+++ b/tools/perf/arch/x86/util/evsel.c
@@ -16,26 +16,6 @@ void arch_evsel__set_sample_weight(struct evsel *evsel)
        evsel__set_sample_bit(evsel, WEIGHT_STRUCT);
 }
 
-void arch_evsel__fixup_new_cycles(struct perf_event_attr *attr)
-{
-       struct perf_env env = { .total_mem = 0, } ;
-
-       if (!perf_env__cpuid(&env))
-               return;
-
-       /*
-        * On AMD, precise cycles event sampling internally uses IBS pmu.
-        * But IBS does not have filtering capabilities and perf by default
-        * sets exclude_guest = 1. This makes IBS pmu event init fail and
-        * thus perf ends up doing non-precise sampling. Avoid it by clearing
-        * exclude_guest.
-        */
-       if (env.cpuid && strstarts(env.cpuid, "AuthenticAMD"))
-               attr->exclude_guest = 0;
-
-       free(env.cpuid);
-}
-
 /* Check whether the evsel's PMU supports the perf metrics */
 bool evsel__sys_has_perf_metrics(const struct evsel *evsel)
 {

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 88f7b42..d80b54a 100644 (file)
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -4161,18 +4161,11 @@ int cmd_record(int argc, const char **argv)
                record.opts.tail_synthesize = true;
 
        if (rec->evlist->core.nr_entries == 0) {
-               if (perf_pmu__has_hybrid()) {
-                       err = evlist__add_default_hybrid(rec->evlist,
-                                                        !record.opts.no_samples);
-               } else {
-                       err = __evlist__add_default(rec->evlist,
-                                                   !record.opts.no_samples);
-               }
+               bool can_profile_kernel = perf_event_paranoid_check(1);
 
-               if (err < 0) {
-                       pr_err("Not enough memory for event selector list\n");
+               err = parse_event(rec->evlist, can_profile_kernel ? "cycles:P" : "cycles:Pu");
+               if (err)
                        goto out;
-               }
        }
 
        if (rec->opts.target.tid && !rec->opts.no_inherit_set)

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 48ee49e..27a7f06 100644 (file)
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1653,10 +1653,12 @@ int cmd_top(int argc, const char **argv)
        if (annotate_check_args(&top.annotation_opts) < 0)
                goto out_delete_evlist;
 
-       if (!top.evlist->core.nr_entries &&
-           evlist__add_default(top.evlist) < 0) {
-               pr_err("Not enough memory for event selector list\n");
-               goto out_delete_evlist;
+       if (!top.evlist->core.nr_entries) {
+               bool can_profile_kernel = perf_event_paranoid_check(1);
+               int err = parse_event(top.evlist, can_profile_kernel ? "cycles:P" : "cycles:Pu");
+
+               if (err)
+                       goto out_delete_evlist;
        }
 
        status = evswitch__init(&top.evswitch, top.evlist, stderr);

diff --git a/tools/perf/util/evlist-hybrid.c b/tools/perf/util/evlist-hybrid.c
index 0f59c80..64f78d0 100644 (file)
--- a/tools/perf/util/evlist-hybrid.c
+++ b/tools/perf/util/evlist-hybrid.c
@@ -16,31 +16,6 @@
 #include <perf/evsel.h>
 #include <perf/cpumap.h>
 
-int evlist__add_default_hybrid(struct evlist *evlist, bool precise)
-{
-       struct evsel *evsel;
-       struct perf_pmu *pmu;
-       __u64 config;
-       struct perf_cpu_map *cpus;
-
-       perf_pmu__for_each_hybrid_pmu(pmu) {
-               config = PERF_COUNT_HW_CPU_CYCLES |
-                        ((__u64)pmu->type << PERF_PMU_TYPE_SHIFT);
-               evsel = evsel__new_cycles(precise, PERF_TYPE_HARDWARE,
-                                         config);
-               if (!evsel)
-                       return -ENOMEM;
-
-               cpus = perf_cpu_map__get(pmu->cpus);
-               evsel->core.cpus = cpus;
-               evsel->core.own_cpus = perf_cpu_map__get(cpus);
-               evsel->pmu_name = strdup(pmu->name);
-               evlist__add(evlist, evsel);
-       }
-
-       return 0;
-}
-
 bool evlist__has_hybrid(struct evlist *evlist)
 {
        struct evsel *evsel;

diff --git a/tools/perf/util/evlist-hybrid.h b/tools/perf/util/evlist-hybrid.h
index 4b000ed..0cded76 100644 (file)
--- a/tools/perf/util/evlist-hybrid.h
+++ b/tools/perf/util/evlist-hybrid.h
@@ -7,7 +7,6 @@
 #include "evlist.h"
 #include <unistd.h>
 
-int evlist__add_default_hybrid(struct evlist *evlist, bool precise);
 bool evlist__has_hybrid(struct evlist *evlist);
 
 #endif /* __PERF_EVLIST_HYBRID_H */

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 9dfa977..63f8821 100644 (file)
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -93,8 +93,15 @@ struct evlist *evlist__new(void)
 struct evlist *evlist__new_default(void)
 {
        struct evlist *evlist = evlist__new();
+       bool can_profile_kernel;
+       int err;
+
+       if (!evlist)
+               return NULL;
 
-       if (evlist && evlist__add_default(evlist)) {
+       can_profile_kernel = perf_event_paranoid_check(1);
+       err = parse_event(evlist, can_profile_kernel ? "cycles:P" : "cycles:Pu");
+       if (err) {
                evlist__delete(evlist);
                evlist = NULL;
        }
@@ -237,19 +244,6 @@ static void evlist__set_leader(struct evlist *evlist)
        perf_evlist__set_leader(&evlist->core);
 }
 
-int __evlist__add_default(struct evlist *evlist, bool precise)
-{
-       struct evsel *evsel;
-
-       evsel = evsel__new_cycles(precise, PERF_TYPE_HARDWARE,
-                                 PERF_COUNT_HW_CPU_CYCLES);
-       if (evsel == NULL)
-               return -ENOMEM;
-
-       evlist__add(evlist, evsel);
-       return 0;
-}
-
 static struct evsel *evlist__dummy_event(struct evlist *evlist)
 {
        struct perf_event_attr attr = {

diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 5e7ff44..664c6bf 100644 (file)
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -100,13 +100,6 @@ void evlist__delete(struct evlist *evlist);
 void evlist__add(struct evlist *evlist, struct evsel *entry);
 void evlist__remove(struct evlist *evlist, struct evsel *evsel);
 
-int __evlist__add_default(struct evlist *evlist, bool precise);
-
-static inline int evlist__add_default(struct evlist *evlist)
-{
-       return __evlist__add_default(evlist, true);
-}
-
 int evlist__add_attrs(struct evlist *evlist, struct perf_event_attr *attrs, size_t nr_attrs);
 
 int __evlist__add_default_attrs(struct evlist *evlist,

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 8c8f371..1df8f96 100644 (file)
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -316,48 +316,6 @@ struct evsel *evsel__new_idx(struct perf_event_attr *attr, int idx)
        return evsel;
 }
 
-static bool perf_event_can_profile_kernel(void)
-{
-       return perf_event_paranoid_check(1);
-}
-
-struct evsel *evsel__new_cycles(bool precise __maybe_unused, __u32 type, __u64 config)
-{
-       struct perf_event_attr attr = {
-               .type   = type,
-               .config = config,
-               .exclude_kernel = !perf_event_can_profile_kernel(),
-       };
-       struct evsel *evsel;
-
-       event_attr_init(&attr);
-
-       /*
-        * Now let the usual logic to set up the perf_event_attr defaults
-        * to kick in when we return and before perf_evsel__open() is called.
-        */
-       evsel = evsel__new(&attr);
-       if (evsel == NULL)
-               goto out;
-
-       arch_evsel__fixup_new_cycles(&evsel->core.attr);
-
-       evsel->precise_max = true;
-
-       /* use asprintf() because free(evsel) assumes name is allocated */
-       if (asprintf(&evsel->name, "cycles%s%s%.*s",
-                    (attr.precise_ip || attr.exclude_kernel) ? ":" : "",
-                    attr.exclude_kernel ? "u" : "",
-                    attr.precise_ip ? attr.precise_ip + 1 : 0, "ppp") < 0)
-               goto error_free;
-out:
-       return evsel;
-error_free:
-       evsel__delete(evsel);
-       evsel = NULL;
-       goto out;
-}
-
 int copy_config_terms(struct list_head *dst, struct list_head *src)
 {
        struct evsel_config_term *pos, *tmp;
@@ -1131,10 +1089,6 @@ void __weak arch_evsel__set_sample_weight(struct evsel *evsel)
        evsel__set_sample_bit(evsel, WEIGHT);
 }
 
-void __weak arch_evsel__fixup_new_cycles(struct perf_event_attr *attr __maybe_unused)
-{
-}
-
 void __weak arch__post_evsel_config(struct evsel *evsel __maybe_unused,
                                    struct perf_event_attr *attr __maybe_unused)
 {

diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index df89287..429b172 100644 (file)
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -243,8 +243,6 @@ static inline struct evsel *evsel__newtp(const char *sys, const char *name)
 }
 #endif
 
-struct evsel *evsel__new_cycles(bool precise, __u32 type, __u64 config);
-
 #ifdef HAVE_LIBTRACEEVENT
 struct tep_event *event_format__new(const char *sys, const char *name);
 #endif
@@ -312,7 +310,6 @@ void __evsel__reset_sample_bit(struct evsel *evsel, enum perf_event_sample_forma
 void evsel__set_sample_id(struct evsel *evsel, bool use_sample_identifier);
 
 void arch_evsel__set_sample_weight(struct evsel *evsel);
-void arch_evsel__fixup_new_cycles(struct perf_event_attr *attr);
 void arch__post_evsel_config(struct evsel *evsel, struct perf_event_attr *attr);
 
 int evsel__set_filter(struct evsel *evsel, const char *filter);

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 0faea4c..3c1f4c9 100644 (file)
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -50,6 +50,14 @@
 #endif
 
 /*
+ * Avoid bringing in event parsing.
+ */
+int parse_event(struct evlist *evlist __maybe_unused, const char *str __maybe_unused)
+{
+       return 0;
+}
+
+/*
  * Provide these two so that we don't have to link against callchain.c and
  * start dragging hist.c, etc.
  */