From nobody Sat Oct 11 11:47:15 2025 Received: from mail-pl1-f201.google.com (mail-pl1-f201.google.com [209.85.214.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0111F230BDB for ; Wed, 11 Jun 2025 03:46:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749613597; cv=none; b=Rh9oIOYLC2cWKktZVrjFtsOeXTupz6Es0K1mqFZN2XRkppTlZ6vOQXMIcbvgGLRGoHgY9HIWBR7RPmf5JBvjRqJn2AuhwcrxUfzj81oux/hIUOc6tWOkcxLHvI4lzwQIxiEu4TV3n0OWy8VHS+7+2GwOgE13VVP/cDCSSBDuSm8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749613597; c=relaxed/simple; bh=bQeLV1BsJ2tvnezVsFH5HQWOoFaIkdLvkn0rDP/V1Ec=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=hdPMPS/FOAk9t7cvHeG+Kj6CQrHxelo63TDffBwIDyc288MZhrNnEJ6PEo7WvlB6LCOCuw9G5XuXYBqIu2F08pSPVWD6tKEawn1FqRBIw3ELryen7qmTyP4yCZmpw2Kgjw95/o/l+yqbkMqWZNVExtys3RSRm7fLLHS0WzwK0+k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=ut16AuJt; arc=none smtp.client-ip=209.85.214.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="ut16AuJt" Received: by mail-pl1-f201.google.com with SMTP id d9443c01a7336-2356ce55d33so69081045ad.0 for ; Tue, 10 Jun 2025 20:46:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1749613595; x=1750218395; darn=vger.kernel.org; h=to:from:subject:message-id:references:mime-version:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=UxJrtp3uxGwwn+DeihPrvlrgDTT79b0N8a6G0RBrVtA=; b=ut16AuJt8b00iTTkheecS9I1qo5bTuKr4MO/rYf+MODCbvHREL5atPQpr2FTryfd7l wERmIhiVSc/4fdysDsYBDWTPY14rfSP7GHUjGsE2pK488RE/wP7QJy+mT31TUM6jfgDH ee53WKHAfG6sSOaUoXYdKMbAx2SyXmp9/0o459gViJfhushAqCFSNnySxnQpRqT97TxM gt1S9xEiiD/CDw4kgY05s0I8FMSKS6NhOri8D/flGruGXj5eT3+Xkota9rv7ZnfgN+aB GnAuUFxk8uhOaut5Wet0nAh4ARdJMxRHtvzirIduSvyfGeIgCSNp3byrGVdLhAqz5lKx k+hg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749613595; x=1750218395; h=to:from:subject:message-id:references:mime-version:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=UxJrtp3uxGwwn+DeihPrvlrgDTT79b0N8a6G0RBrVtA=; b=piCY56o5W5zr32f0OJohFALtn2z/6b6Gjz6mAJdNRgQ+snN02G0PWAmar8iie1bZv/ bQFoiE2yAsOyalC4bJ2yfjIBQLO+KC+FVJp6zNM2tSV4OFW77squYWyTYZnjZDWvXy47 7hKgm2eycSAjqZCDeguwMxlmjvd50xm4vjRQxpWW11jdtl/IHbzvbITDYin0HCutPXRw eLAcrN4ghmuXkTIdC6k6wbif3QJLEAVBpjdXAVi9Y381Qxwe3xaBa0MsWoEcgYtdQTGr TudeDszXqbLx2JHe9tKwi7vefXN4W0mQwHfaef3aF4gmsov4UuzaV3S7xXZjlguvuqLz hd1g== X-Forwarded-Encrypted: i=1; AJvYcCWnpPxq+C4egjdo7REFs43L8yK4+DOUdhpJvtbrf/tqpULkXXCg6DEO+/zLLuJjOn9jLbg9KW7QQw232SY=@vger.kernel.org X-Gm-Message-State: AOJu0YzFq4Q9/EMD7DBSCuaoaffu1eIuAzvIp8r1frXK5pkCo0gOcPMf Gc93dLa7NzuBcgmtdUWHQv1DgilZyktHwjJGgMyprWbt13yTPFExtdrLdAnPrmSR+1wgAbc5NvW Dzxa22ocUSA== X-Google-Smtp-Source: AGHT+IHdBsrZK7lKlFWDCeqSwDzEHE7m9FEL79073ZAvAjX/z+FH/MZkc4sJ6A5prM9S0YwYy3lIdJD1vKnl X-Received: from pjbsk13.prod.google.com ([2002:a17:90b:2dcd:b0:312:187d:382d]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:c952:b0:233:fc2f:d174 with SMTP id d9443c01a7336-23641b19878mr24815365ad.34.1749613595425; Tue, 10 Jun 2025 20:46:35 -0700 (PDT) Date: Tue, 10 Jun 2025 20:45:26 -0700 In-Reply-To: <20250611034529.508842-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250611034529.508842-1-irogers@google.com> X-Mailer: git-send-email 2.50.0.rc0.642.g800a2b2222-goog Message-ID: <20250611034529.508842-13-irogers@google.com> Subject: [PATCH v1 12/15] perf tp_pmu: Factor existing tracepoint logic to new file From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , James Clark , Xu Yang , John Garry , "Masami Hiramatsu (Google)" , Howard Chu , Weilin Wang , Thomas Richter , Andi Kleen , Tiezhu Yang , Gautam Menghani , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Start the creation of a tracepoint PMU abstraction. Tracepoint events don't follow the regular sysfs perf conventions. Eventually the new PMU abstraction will bridge the gap so tracepoint events look more like regular perf ones. Signed-off-by: Ian Rogers --- tools/perf/util/Build | 1 + tools/perf/util/evsel.c | 21 +---- tools/perf/util/parse-events.c | 147 ++++++++++++++------------------- tools/perf/util/tp_pmu.c | 95 +++++++++++++++++++++ tools/perf/util/tp_pmu.h | 12 +++ 5 files changed, 170 insertions(+), 106 deletions(-) create mode 100644 tools/perf/util/tp_pmu.c create mode 100644 tools/perf/util/tp_pmu.h diff --git a/tools/perf/util/Build b/tools/perf/util/Build index 7910d908c814..a06ff82f9dd7 100644 --- a/tools/perf/util/Build +++ b/tools/perf/util/Build @@ -86,6 +86,7 @@ perf-util-y +=3D pmu-flex.o perf-util-y +=3D pmu-bison.o perf-util-y +=3D hwmon_pmu.o perf-util-y +=3D tool_pmu.o +perf-util-y +=3D tp_pmu.o perf-util-y +=3D svghelper.o perf-util-y +=3D trace-event-info.o perf-util-y +=3D trace-event-scripting.o diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index d55482f094bf..beab9710fbf5 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -58,6 +58,7 @@ #include "pmus.h" #include "hwmon_pmu.h" #include "tool_pmu.h" +#include "tp_pmu.h" #include "rlimit.h" #include "../perf-sys.h" #include "util/parse-branch-options.h" @@ -570,24 +571,6 @@ struct evsel *evsel__clone(struct evsel *dest, struct = evsel *orig) return NULL; } =20 -static int trace_event__id(const char *sys, const char *name) -{ - char *tp_dir =3D get_events_file(sys); - char path[PATH_MAX]; - int id, err; - - if (!tp_dir) - return -1; - - scnprintf(path, PATH_MAX, "%s/%s/id", tp_dir, name); - put_events_file(tp_dir); - err =3D filename__read_int(path, &id); - if (err) - return err; - - return id; -} - /* * Returns pointer with encoded error via interface. */ @@ -621,7 +604,7 @@ struct evsel *evsel__newtp_idx(const char *sys, const c= har *name, int idx, bool event_attr_init(&attr); =20 if (format) { - id =3D trace_event__id(sys, name); + id =3D tp_pmu__id(sys, name); if (id < 0) { err =3D id; goto out_free; diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 4dbae59dccb3..b3f56236fd60 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -17,13 +17,12 @@ #include "string2.h" #include "strbuf.h" #include "debug.h" -#include -#include #include #include #include #include "pmu.h" #include "pmus.h" +#include "tp_pmu.h" #include "asm/bug.h" #include "ui/ui.h" #include "util/parse-branch-options.h" @@ -33,6 +32,7 @@ #include "util/stat.h" #include "util/util.h" #include "tracepoint.h" +#include =20 #define MAX_NAME_LEN 100 =20 @@ -558,105 +558,82 @@ static int add_tracepoint(struct parse_events_state = *parse_state, return 0; } =20 -static int add_tracepoint_multi_event(struct parse_events_state *parse_sta= te, - struct list_head *list, - const char *sys_name, const char *evt_name, - struct parse_events_error *err, - struct parse_events_terms *head_config, YYLTYPE *loc) -{ - char *evt_path; - struct io_dirent64 *evt_ent; - struct io_dir evt_dir; - int ret =3D 0, found =3D 0; - - evt_path =3D get_events_file(sys_name); - if (!evt_path) { - tracepoint_error(err, errno, sys_name, evt_name, loc->first_column); - return -1; - } - io_dir__init(&evt_dir, open(evt_path, O_CLOEXEC | O_DIRECTORY | O_RDONLY)= ); - if (evt_dir.dirfd < 0) { - put_events_file(evt_path); - tracepoint_error(err, errno, sys_name, evt_name, loc->first_column); - return -1; - } +struct add_tracepoint_multi_args { + struct parse_events_state *parse_state; + struct list_head *list; + const char *sys_glob; + const char *evt_glob; + struct parse_events_error *err; + struct parse_events_terms *head_config; + YYLTYPE *loc; + int found; +}; =20 - while (!ret && (evt_ent =3D io_dir__readdir(&evt_dir))) { - if (!strcmp(evt_ent->d_name, ".") - || !strcmp(evt_ent->d_name, "..") - || !strcmp(evt_ent->d_name, "enable") - || !strcmp(evt_ent->d_name, "filter")) - continue; +static int add_tracepoint_multi_event_cb(void *state, const char *sys_name= , const char *evt_name) +{ + struct add_tracepoint_multi_args *args =3D state; + int ret; =20 - if (!strglobmatch(evt_ent->d_name, evt_name)) - continue; + if (!strglobmatch(evt_name, args->evt_glob)) + return 0; =20 - found++; + args->found++; + ret =3D add_tracepoint(args->parse_state, args->list, sys_name, evt_name, + args->err, args->head_config, args->loc); =20 - ret =3D add_tracepoint(parse_state, list, sys_name, evt_ent->d_name, - err, head_config, loc); - } + return ret; +} =20 - if (!found) { - tracepoint_error(err, ENOENT, sys_name, evt_name, loc->first_column); - ret =3D -1; +static int add_tracepoint_multi_event(struct add_tracepoint_multi_args *ar= gs, const char *sys_name) +{ + if (strpbrk(args->evt_glob, "*?") =3D=3D NULL) { + /* Not a glob. */ + args->found++; + return add_tracepoint(args->parse_state, args->list, sys_name, args->evt= _glob, + args->err, args->head_config, args->loc); } =20 - put_events_file(evt_path); - close(evt_dir.dirfd); - return ret; + return tp_pmu__for_each_tp_event(sys_name, args, add_tracepoint_multi_eve= nt_cb); } =20 -static int add_tracepoint_event(struct parse_events_state *parse_state, - struct list_head *list, - const char *sys_name, const char *evt_name, - struct parse_events_error *err, - struct parse_events_terms *head_config, YYLTYPE *loc) +static int add_tracepoint_multi_sys_cb(void *state, const char *sys_name) { - return strpbrk(evt_name, "*?") ? - add_tracepoint_multi_event(parse_state, list, sys_name, evt_name, - err, head_config, loc) : - add_tracepoint(parse_state, list, sys_name, evt_name, - err, head_config, loc); + struct add_tracepoint_multi_args *args =3D state; + + if (!strglobmatch(sys_name, args->sys_glob)) + return 0; + + return add_tracepoint_multi_event(args, sys_name); } =20 static int add_tracepoint_multi_sys(struct parse_events_state *parse_state, struct list_head *list, - const char *sys_name, const char *evt_name, + const char *sys_glob, const char *evt_glob, struct parse_events_error *err, struct parse_events_terms *head_config, YYLTYPE *loc) { - struct io_dirent64 *events_ent; - struct io_dir events_dir; - int ret =3D 0; - char *events_dir_path =3D get_tracing_file("events"); + struct add_tracepoint_multi_args args =3D { + .parse_state =3D parse_state, + .list =3D list, + .sys_glob =3D sys_glob, + .evt_glob =3D evt_glob, + .err =3D err, + .head_config =3D head_config, + .loc =3D loc, + .found =3D 0, + }; + int ret; =20 - if (!events_dir_path) { - tracepoint_error(err, errno, sys_name, evt_name, loc->first_column); - return -1; + if (strpbrk(sys_glob, "*?") =3D=3D NULL) { + /* Not a glob. */ + ret =3D add_tracepoint_multi_event(&args, sys_glob); + } else { + ret =3D tp_pmu__for_each_tp_sys(&args, add_tracepoint_multi_sys_cb); } - io_dir__init(&events_dir, open(events_dir_path, O_CLOEXEC | O_DIRECTORY |= O_RDONLY)); - put_events_file(events_dir_path); - if (events_dir.dirfd < 0) { - tracepoint_error(err, errno, sys_name, evt_name, loc->first_column); - return -1; + if (args.found =3D=3D 0) { + tracepoint_error(err, ENOENT, sys_glob, evt_glob, loc->first_column); + return -ENOENT; } - - while (!ret && (events_ent =3D io_dir__readdir(&events_dir))) { - if (!strcmp(events_ent->d_name, ".") - || !strcmp(events_ent->d_name, "..") - || !strcmp(events_ent->d_name, "enable") - || !strcmp(events_ent->d_name, "header_event") - || !strcmp(events_ent->d_name, "header_page")) - continue; - - if (!strglobmatch(events_ent->d_name, sys_name)) - continue; - - ret =3D add_tracepoint_event(parse_state, list, events_ent->d_name, - evt_name, err, head_config, loc); - } - close(events_dir.dirfd); return ret; } =20 @@ -1348,12 +1325,8 @@ int parse_events_add_tracepoint(struct parse_events_= state *parse_state, return -EINVAL; } =20 - if (strpbrk(sys, "*?")) - return add_tracepoint_multi_sys(parse_state, list, sys, event, - err, head_config, loc); - else - return add_tracepoint_event(parse_state, list, sys, event, - err, head_config, loc); + return add_tracepoint_multi_sys(parse_state, list, sys, event, + err, head_config, loc); } =20 static int __parse_events_add_numeric(struct parse_events_state *parse_sta= te, diff --git a/tools/perf/util/tp_pmu.c b/tools/perf/util/tp_pmu.c new file mode 100644 index 000000000000..fd83164f8763 --- /dev/null +++ b/tools/perf/util/tp_pmu.c @@ -0,0 +1,95 @@ +// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) +#include "tp_pmu.h" +#include +#include +#include +#include +#include +#include + +int tp_pmu__id(const char *sys, const char *name) +{ + char *tp_dir =3D get_events_file(sys); + char path[PATH_MAX]; + int id, err; + + if (!tp_dir) + return -1; + + scnprintf(path, PATH_MAX, "%s/%s/id", tp_dir, name); + put_events_file(tp_dir); + err =3D filename__read_int(path, &id); + if (err) + return err; + + return id; +} + + +int tp_pmu__for_each_tp_event(const char *sys, void *state, tp_event_callb= ack cb) +{ + char *evt_path; + struct io_dirent64 *evt_ent; + struct io_dir evt_dir; + int ret =3D 0; + + evt_path =3D get_events_file(sys); + if (!evt_path) + return -errno; + + io_dir__init(&evt_dir, open(evt_path, O_CLOEXEC | O_DIRECTORY | O_RDONLY)= ); + if (evt_dir.dirfd < 0) { + ret =3D -errno; + put_events_file(evt_path); + return ret; + } + put_events_file(evt_path); + + while (!ret && (evt_ent =3D io_dir__readdir(&evt_dir))) { + if (!strcmp(evt_ent->d_name, ".") + || !strcmp(evt_ent->d_name, "..") + || !strcmp(evt_ent->d_name, "enable") + || !strcmp(evt_ent->d_name, "filter")) + continue; + + ret =3D cb(state, sys, evt_ent->d_name); + if (ret) + break; + } + close(evt_dir.dirfd); + return ret; +} + +int tp_pmu__for_each_tp_sys(void *state, tp_sys_callback cb) +{ + struct io_dirent64 *events_ent; + struct io_dir events_dir; + int ret =3D 0; + char *events_dir_path =3D get_tracing_file("events"); + + if (!events_dir_path) + return -errno; + + io_dir__init(&events_dir, open(events_dir_path, O_CLOEXEC | O_DIRECTORY |= O_RDONLY)); + if (events_dir.dirfd < 0) { + ret =3D -errno; + put_events_file(events_dir_path); + return ret; + } + put_events_file(events_dir_path); + + while (!ret && (events_ent =3D io_dir__readdir(&events_dir))) { + if (!strcmp(events_ent->d_name, ".") + || !strcmp(events_ent->d_name, "..") + || !strcmp(events_ent->d_name, "enable") + || !strcmp(events_ent->d_name, "header_event") + || !strcmp(events_ent->d_name, "header_page")) + continue; + + ret =3D cb(state, events_ent->d_name); + if (ret) + break; + } + close(events_dir.dirfd); + return ret; +} diff --git a/tools/perf/util/tp_pmu.h b/tools/perf/util/tp_pmu.h new file mode 100644 index 000000000000..49537303bd73 --- /dev/null +++ b/tools/perf/util/tp_pmu.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ +#ifndef __TP_PMU_H +#define __TP_PMU_H + +typedef int (*tp_sys_callback)(void *state, const char *sys_name); +typedef int (*tp_event_callback)(void *state, const char *sys_name, const = char *evt_name); + +int tp_pmu__id(const char *sys, const char *name); +int tp_pmu__for_each_tp_event(const char *sys, void *state, tp_event_callb= ack cb); +int tp_pmu__for_each_tp_sys(void *state, tp_sys_callback cb); + +#endif /* __TP_PMU_H */ --=20 2.50.0.rc0.642.g800a2b2222-goog