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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by DM6NAM11FT038.mail.protection.outlook.com (10.13.173.137) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6043.22 via Frontend Transport; Mon, 30 Jan 2023 06:00:49 +0000 Received: from sindhu.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Mon, 30 Jan 2023 00:00:40 -0600 From: Sandipan Das To: , , CC: , , , , , , , , , , , , , , , , Subject: [PATCH v3 1/2] perf script: Show branch speculation info Date: Mon, 30 Jan 2023 11:29:15 +0530 Message-ID: <87c48949f5a442dda6d4dc75d4a4303973eb04b2.1675057032.git.sandipan.das@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT038:EE_|SJ0PR12MB6710:EE_ X-MS-Office365-Filtering-Correlation-Id: e8ff8333-becf-4819-9f92-08db02875614 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Jan 2023 06:00:49.0308 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e8ff8333-becf-4819-9f92-08db02875614 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT038.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB6710 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Show the branch speculation info if provided by the branch recording hardware feature. This can be useful for optimizing code further. The speculation info is appended to the end of the list of fields so any existing tools that use "/" as a delimiter for access fields via an index remain unaffected. Also show "-" instead of "N/A" when speculation info is unavailable because "/" is used as the field separator. E.g. $ perf record -j any,u,save_type ./test_branch $ perf script --fields brstacksym Before: [...] check_match+0x60/strcmp+0x0/P/-/-/0/CALL do_lookup_x+0x3c5/check_match+0x0/P/-/-/0/CALL [...] After: [...] check_match+0x60/strcmp+0x0/P/-/-/0/CALL/NON_SPEC_CORRECT_PATH do_lookup_x+0x3c5/check_match+0x0/P/-/-/0/CALL/NON_SPEC_CORRECT_PATH [...] Signed-off-by: Sandipan Das --- tools/perf/builtin-script.c | 5 +++-- tools/perf/util/branch.c | 15 +++++++++++++++ tools/perf/util/branch.h | 2 ++ tools/perf/util/evsel.c | 15 ++++++++++++--- 4 files changed, 32 insertions(+), 5 deletions(-) diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index 69394ac0a20d..782319e8fe6a 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -880,12 +880,13 @@ mispred_str(struct branch_entry *br) =20 static int print_bstack_flags(FILE *fp, struct branch_entry *br) { - return fprintf(fp, "/%c/%c/%c/%d/%s ", + return fprintf(fp, "/%c/%c/%c/%d/%s/%s ", mispred_str(br), br->flags.in_tx ? 'X' : '-', br->flags.abort ? 'A' : '-', br->flags.cycles, - get_branch_type(br)); + get_branch_type(br), + br->flags.spec ? branch_spec_desc(br->flags.spec) : "-"); } =20 static int perf_sample__fprintf_brstack(struct perf_sample *sample, diff --git a/tools/perf/util/branch.c b/tools/perf/util/branch.c index 6d38238481d3..378f16a24751 100644 --- a/tools/perf/util/branch.c +++ b/tools/perf/util/branch.c @@ -212,3 +212,18 @@ int branch_type_str(struct branch_type_stat *st, char = *bf, int size) =20 return printed; } + +const char *branch_spec_desc(int spec) +{ + const char *branch_spec_outcomes[PERF_BR_SPEC_MAX] =3D { + "N/A", + "SPEC_WRONG_PATH", + "NON_SPEC_CORRECT_PATH", + "SPEC_CORRECT_PATH", + }; + + if (spec >=3D 0 && spec < PERF_BR_SPEC_MAX) + return branch_spec_outcomes[spec]; + + return NULL; +} diff --git a/tools/perf/util/branch.h b/tools/perf/util/branch.h index 3ed792db1125..e41bfffe2217 100644 --- a/tools/perf/util/branch.h +++ b/tools/perf/util/branch.h @@ -89,4 +89,6 @@ const char *get_branch_type(struct branch_entry *e); void branch_type_stat_display(FILE *fp, struct branch_type_stat *st); int branch_type_str(struct branch_type_stat *st, char *bf, int bfsize); =20 +const char *branch_spec_desc(int spec); + #endif /* _PERF_BRANCH_H */ diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 8550638587e5..019e53db03b3 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -2319,7 +2319,10 @@ u64 evsel__bitfield_swap_branch_flags(u64 value) * abort:1 //transaction abort * cycles:16 //cycle count to last branch * type:4 //branch type - * reserved:40 + * spec:2 //branch speculation info + * new_type:4 //additional branch type + * priv:3 //privilege level + * reserved:31 * } * } * @@ -2335,7 +2338,10 @@ u64 evsel__bitfield_swap_branch_flags(u64 value) new_val |=3D bitfield_swap(value, 3, 1); new_val |=3D bitfield_swap(value, 4, 16); new_val |=3D bitfield_swap(value, 20, 4); - new_val |=3D bitfield_swap(value, 24, 40); + new_val |=3D bitfield_swap(value, 24, 2); + new_val |=3D bitfield_swap(value, 26, 4); + new_val |=3D bitfield_swap(value, 30, 3); + new_val |=3D bitfield_swap(value, 33, 31); } else { new_val =3D bitfield_swap(value, 63, 1); new_val |=3D bitfield_swap(value, 62, 1); @@ -2343,7 +2349,10 @@ u64 evsel__bitfield_swap_branch_flags(u64 value) new_val |=3D bitfield_swap(value, 60, 1); new_val |=3D bitfield_swap(value, 44, 16); new_val |=3D bitfield_swap(value, 40, 4); - new_val |=3D bitfield_swap(value, 0, 40); + new_val |=3D bitfield_swap(value, 38, 2); + new_val |=3D bitfield_swap(value, 34, 4); + new_val |=3D bitfield_swap(value, 31, 3); + new_val |=3D bitfield_swap(value, 0, 31); } =20 return new_val; --=20 2.34.1 From nobody Sat Sep 13 21:58:58 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7679DC54EAA for ; Mon, 30 Jan 2023 06:01:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235723AbjA3GB5 (ORCPT ); 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Mon, 30 Jan 2023 00:00:59 -0600 From: Sandipan Das To: , , CC: , , , , , , , , , , , , , , , , Subject: [PATCH v3 2/2] perf session: Show branch speculation info in raw dump Date: Mon, 30 Jan 2023 11:29:16 +0530 Message-ID: X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT025:EE_|SN7PR12MB6929:EE_ X-MS-Office365-Filtering-Correlation-Id: 239335b3-4377-442f-6b6d-08db02877aa8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230025)(4636009)(39860400002)(346002)(136003)(376002)(396003)(451199018)(40470700004)(46966006)(36840700001)(4326008)(41300700001)(8676002)(40480700001)(6666004)(110136005)(8936002)(316002)(70586007)(54906003)(5660300002)(70206006)(7416002)(44832011)(83380400001)(40460700003)(36756003)(36860700001)(81166007)(7696005)(2906002)(26005)(186003)(16526019)(478600001)(2616005)(86362001)(426003)(336012)(47076005)(356005)(82740400003)(82310400005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Jan 2023 06:01:50.3974 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 239335b3-4377-442f-6b6d-08db02877aa8 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT025.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB6929 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Show the branch speculation info if provided by the branch recording hardware feature. This can be useful for purposes of code optimization. E.g. $ perf record -j any,u ./test_branch $ perf report --dump-raw-trace Before: [...] 8380958377610 0x40b178 [0x1b0]: PERF_RECORD_SAMPLE(IP, 0x2): 7952/7952: 0= x4f851a period: 48973 addr: 0 ... branch stack: nr:16 ..... 0: 00000000004b52fd -> 00000000004f82c0 0 cycles P 0 ..... 1: ffffffff8220137c -> 00000000004b52f0 0 cycles M 0 ..... 2: 000000000041d1c4 -> 00000000004b52f0 0 cycles P 0 ..... 3: 00000000004e7ead -> 000000000041d1b0 0 cycles M 0 ..... 4: 00000000004e7f91 -> 00000000004e7ead 0 cycles P 0 ..... 5: 00000000004e7ea8 -> 00000000004e7f70 0 cycles P 0 ..... 6: 00000000004e7e52 -> 00000000004e7e98 0 cycles M 0 ..... 7: 00000000004e7e1f -> 00000000004e7e40 0 cycles M 0 ..... 8: 00000000004e7f60 -> 00000000004e7df0 0 cycles P 0 ..... 9: 00000000004e7f58 -> 00000000004e7f60 0 cycles M 0 ..... 10: 000000000041d85d -> 00000000004e7f50 0 cycles P 0 ..... 11: 000000000043306a -> 000000000041d840 0 cycles P 0 ..... 12: ffffffff8220137c -> 0000000000433040 0 cycles M 0 ..... 13: 000000000041e4a1 -> 0000000000433040 0 cycles P 0 ..... 14: ffffffff8220137c -> 000000000041e490 0 cycles M 0 ..... 15: 000000000041d89b -> 000000000041e487 0 cycles P 0 ... thread: test_branch:7952 ...... dso: /data/sandipan/test_branch [...] After: [...] 8380958377610 0x40b178 [0x1b0]: PERF_RECORD_SAMPLE(IP, 0x2): 7952/7952: 0= x4f851a period: 48973 addr: 0 ... branch stack: nr:16 ..... 0: 00000000004b52fd -> 00000000004f82c0 0 cycles P 0 NON_SPEC_= CORRECT_PATH ..... 1: ffffffff8220137c -> 00000000004b52f0 0 cycles M 0 NON_SPEC_= CORRECT_PATH ..... 2: 000000000041d1c4 -> 00000000004b52f0 0 cycles P 0 NON_SPEC_= CORRECT_PATH ..... 3: 00000000004e7ead -> 000000000041d1b0 0 cycles M 0 NON_SPEC_= CORRECT_PATH ..... 4: 00000000004e7f91 -> 00000000004e7ead 0 cycles P 0 NON_SPEC_= CORRECT_PATH ..... 5: 00000000004e7ea8 -> 00000000004e7f70 0 cycles P 0 NON_SPEC_= CORRECT_PATH ..... 6: 00000000004e7e52 -> 00000000004e7e98 0 cycles M 0 SPEC_CORR= ECT_PATH ..... 7: 00000000004e7e1f -> 00000000004e7e40 0 cycles M 0 NON_SPEC_= CORRECT_PATH ..... 8: 00000000004e7f60 -> 00000000004e7df0 0 cycles P 0 NON_SPEC_= CORRECT_PATH ..... 9: 00000000004e7f58 -> 00000000004e7f60 0 cycles M 0 NON_SPEC_= CORRECT_PATH ..... 10: 000000000041d85d -> 00000000004e7f50 0 cycles P 0 NON_SPEC_= CORRECT_PATH ..... 11: 000000000043306a -> 000000000041d840 0 cycles P 0 NON_SPEC_= CORRECT_PATH ..... 12: ffffffff8220137c -> 0000000000433040 0 cycles M 0 NON_SPEC_= CORRECT_PATH ..... 13: 000000000041e4a1 -> 0000000000433040 0 cycles P 0 NON_SPEC_= CORRECT_PATH ..... 14: ffffffff8220137c -> 000000000041e490 0 cycles M 0 NON_SPEC_= CORRECT_PATH ..... 15: 000000000041d89b -> 000000000041e487 0 cycles P 0 NON_SPEC_= CORRECT_PATH ... thread: test_branch:7952 ...... dso: /data/sandipan/test_branch [...] Signed-off-by: Sandipan Das --- tools/perf/util/session.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 7c021c6cedb9..a42f051dab9d 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -1180,7 +1180,7 @@ static void branch_stack__printf(struct perf_sample *= sample, bool callstack) struct branch_entry *e =3D &entries[i]; =20 if (!callstack) { - printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %= s%s%s%s %x %s\n", + printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %= s%s%s%s %x %s %s\n", i, e->from, e->to, (unsigned short)e->flags.cycles, e->flags.mispred ? "M" : " ", @@ -1188,7 +1188,8 @@ static void branch_stack__printf(struct perf_sample *= sample, bool callstack) e->flags.abort ? "A" : " ", e->flags.in_tx ? "T" : " ", (unsigned)e->flags.reserved, - get_branch_type(e)); + get_branch_type(e), + e->flags.spec ? branch_spec_desc(e->flags.spec) : ""); } else { if (i =3D=3D 0) { printf("..... %2"PRIu64": %016" PRIx64 "\n" --=20 2.34.1