From nobody Tue Dec 2 00:25:34 2025 Received: from sender3-pp-f112.zoho.com (sender3-pp-f112.zoho.com [136.143.184.112]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6583C2F363B; Mon, 24 Nov 2025 21:24:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.184.112 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764019454; cv=pass; b=MMA1vKipD2IO7EoNtu7B5DZQi93xHybpbum6y43pHachr3ShLsjmID6fCWxBvS+t78AYezlNmPQ1TEMExcd4P0rP0j470Uuq6bQLGXXvY297DexaPdlid4GvLnIr311ZXwV9/dIk9DiZuYAyYFJI1Zaw3T9F8q1ozvBo1wVIWZA= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764019454; c=relaxed/simple; bh=sevA2JknAt6QkW2DSkMZ3VhBnHCK3YacoP54ZHcgmWs=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=omsKV7rqmrYxfMdjXG4kxayVfIfI2ORxDlcJBGWpbwS7Y6g58VVuaeEm7DC1l2hBllr7qE5p9TxTHzUj+KItCKA4ANbOYcajTJH/1hkk8fb/qjKtQIlw0cNBIsqcULc3O7qTQtUbWyV1+F+nddPPvUsJkH8zm2aThsve8lnEHSc= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (1024-bit key) header.d=collabora.com header.i=derek.foreman@collabora.com header.b=KRnndxy0; arc=pass smtp.client-ip=136.143.184.112 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=collabora.com header.i=derek.foreman@collabora.com header.b="KRnndxy0" ARC-Seal: i=1; a=rsa-sha256; t=1764019404; cv=none; d=zohomail.com; s=zohoarc; b=lwGWhKvYKAA5wqGBCWEyvVALDc9rSON3LbY6YQODPwmrzwUS0AtzHZqieyVJoXSkdzrPoDD8QTmuSpZ5Oe3nYPDwDZ1mUse9/LK2qdGQxW9eflEhAvM+ekTThdtY97g7jvQ/Kg/aazYRdPIvW/WhogXxr9h6Fi+Pc581RyE6Erk= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1764019404; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:MIME-Version:Message-ID:Subject:Subject:To:To:Message-Id:Reply-To; bh=+xnE+1HBZXX6YMytZ+iSpT2O0yHGEOoCmf6XDPOjcn4=; b=HkGZBc48lpYMgw8VVJZ+/7twx7QYnxEkrp55glHAVu7925nxsMlOoRzuk1tdfOf/EM2uzaWx8mApG97sDfCuCkd9u3MMfqCzP83CcXGWQho4e11pNpkuJLP0zDyfPouSTUfQ2gIrFvVPPuUDk/odhec1qTpSniRDzhMzAvQN3WM= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=derek.foreman@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1764019404; s=zohomail; d=collabora.com; i=derek.foreman@collabora.com; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:MIME-Version:Content-Transfer-Encoding:Message-Id:Reply-To; bh=+xnE+1HBZXX6YMytZ+iSpT2O0yHGEOoCmf6XDPOjcn4=; b=KRnndxy0SdoWeFLVVXH+5xZDtZHU9Om3rGAKMv1fEGoq75V/BEQomw2EAlojDvSm RV3APzmw9P5031b//eSrKMOCWGUtRrrLGG7ybTIpFVqFYcUbTDN4Jz3x0Bgx/YyE0Pw 49U7mCe9CNlHqG4ZmJLZgfQY1/yjQ4rXoTUEf/ig= Received: by mx.zohomail.com with SMTPS id 1764019401636556.5261613838819; Mon, 24 Nov 2025 13:23:21 -0800 (PST) From: Derek Foreman To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark Cc: kernel@collabora.com, Derek Foreman , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] perf data: Allow filtering conversion by start and end time Date: Mon, 24 Nov 2025 15:23:00 -0600 Message-ID: <20251124212301.450296-1-derek.foreman@collabora.com> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMailClient: External Content-Type: text/plain; charset="utf-8" This adds a feature to allow restricting the range of converted samples with start and end times specified in nanoseconds. Use it like this: $ perf data convert --to-json out.json -s 12345 -e 13340 Start, end, or both may be omitted. Signed-off-by: Derek Foreman --- tools/perf/Documentation/perf-data.txt | 6 ++++++ tools/perf/builtin-data.c | 4 ++++ tools/perf/util/data-convert-bt.c | 18 ++++++++++++++++++ tools/perf/util/data-convert-json.c | 18 ++++++++++++++++++ tools/perf/util/data-convert.h | 3 +++ 5 files changed, 49 insertions(+) diff --git a/tools/perf/Documentation/perf-data.txt b/tools/perf/Documentat= ion/perf-data.txt index 417bf17e265c..db0de1f354a3 100644 --- a/tools/perf/Documentation/perf-data.txt +++ b/tools/perf/Documentation/perf-data.txt @@ -40,6 +40,12 @@ OPTIONS for 'convert' --force:: Don't complain, do it. =20 +-s:: + Start time, in nanoseconds. Samples before this time will not be converte= d. + +-e:: + End time, in nanoseconds. Samples after this time will not be converted. + -v:: --verbose:: Be more verbose (show counter open errors, etc). diff --git a/tools/perf/builtin-data.c b/tools/perf/builtin-data.c index ce51cbf6dc97..da813c62e284 100644 --- a/tools/perf/builtin-data.c +++ b/tools/perf/builtin-data.c @@ -33,6 +33,8 @@ const char *to_ctf; struct perf_data_convert_opts opts =3D { .force =3D false, .all =3D false, + .range_start =3D 0, + .range_end =3D 0, }; =20 const struct option data_options[] =3D { @@ -45,6 +47,8 @@ const struct option data_options[] =3D { #endif OPT_BOOLEAN('f', "force", &opts.force, "don't complain, do it"), OPT_BOOLEAN(0, "all", &opts.all, "Convert all events"), + OPT_U64('s', "start", &opts.range_start, "Earliest timestamp to convert"= ), + OPT_U64('e', "end", &opts.range_end, "Latest timestamp to convert"), OPT_END() }; =20 diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-conve= rt-bt.c index 3d2e437e1354..6819f11fe900 100644 --- a/tools/perf/util/data-convert-bt.c +++ b/tools/perf/util/data-convert-bt.c @@ -91,9 +91,13 @@ struct convert { struct perf_tool tool; struct ctf_writer writer; =20 + u64 start; + u64 end; + u64 events_size; u64 events_count; u64 non_sample_count; + u64 skipped; =20 /* Ordered events configured queue size. */ u64 queue_size; @@ -811,6 +815,12 @@ static int process_sample_event(const struct perf_tool= *tool, if (WARN_ONCE(!priv, "Failed to setup all events.\n")) return 0; =20 + if (sample->time < c->start || + (c->end && sample->time > c->end)) { + ++c->skipped; + return 0; + } + event_class =3D priv->event_class; =20 /* update stats */ @@ -1626,6 +1636,9 @@ int bt_convert__perf2ctf(const char *input, const cha= r *path, c.tool.namespaces =3D perf_event__process_namespaces; c.tool.ordering_requires_timestamps =3D true; =20 + c.start =3D opts->range_start; + c.end =3D opts->range_end; + if (opts->all) { c.tool.comm =3D process_comm_event; c.tool.exit =3D process_exit_event; @@ -1677,6 +1690,11 @@ int bt_convert__perf2ctf(const char *input, const ch= ar *path, "[ perf data convert: Converted '%s' into CTF data '%s' ]\n", data.path, path); =20 + if (c.skipped) + fprintf(stderr, + "[ perf data convert: Skipped %" PRIu64 " samples", + c.skipped); + fprintf(stderr, "[ perf data convert: Converted and wrote %.3f MB (%" PRIu64 " samples", (double) c.events_size / 1024.0 / 1024.0, diff --git a/tools/perf/util/data-convert-json.c b/tools/perf/util/data-con= vert-json.c index 9dc1e184cf3c..dcbba34d6b08 100644 --- a/tools/perf/util/data-convert-json.c +++ b/tools/perf/util/data-convert-json.c @@ -35,7 +35,11 @@ struct convert_json { struct perf_tool tool; FILE *out; bool first; + u64 start; + u64 end; + u64 events_count; + u64 skipped; }; =20 // Outputs a JSON-encoded string surrounded by quotes with characters esca= ped. @@ -165,6 +169,12 @@ static int process_sample_event(const struct perf_tool= *tool, return -1; } =20 + if (sample->time < c->start || + (c->end && sample->time > c->end)) { + ++c->skipped; + return 0; + } + ++c->events_count; =20 if (c->first) @@ -320,6 +330,9 @@ int bt_convert__perf2json(const char *input_name, const= char *output_name, struct convert_json c =3D { .first =3D true, .events_count =3D 0, + .start =3D opts->range_start, + .end =3D opts->range_end, + .skipped =3D 0, }; struct perf_data data =3D { .mode =3D PERF_DATA_MODE_READ, @@ -407,6 +420,11 @@ int bt_convert__perf2json(const char *input_name, cons= t char *output_name, "[ perf data convert: Converted '%s' into JSON data '%s' ]\n", data.path, output_name); =20 + if (c.skipped) + fprintf(stderr, + "[ perf data convert: Skipped %" PRIu64 " samples.\n", + c.skipped); + fprintf(stderr, "[ perf data convert: Converted and wrote %.3f MB (%" PRIu64 " samples)= ]\n", (ftell(c.out)) / 1024.0 / 1024.0, c.events_count); diff --git a/tools/perf/util/data-convert.h b/tools/perf/util/data-convert.h index 1b4c5f598415..5d055e1c31c8 100644 --- a/tools/perf/util/data-convert.h +++ b/tools/perf/util/data-convert.h @@ -3,11 +3,14 @@ #define __DATA_CONVERT_H =20 #include +#include =20 struct perf_data_convert_opts { bool force; bool all; bool tod; + u64 range_start; + u64 range_end; }; =20 #ifdef HAVE_LIBBABELTRACE_SUPPORT --=20 2.47.3