From nobody Mon Dec 15 22:02:33 2025 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id BCA50204C0F; Tue, 4 Mar 2025 11:13:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741086784; cv=none; b=kfUKYY9gRCwLhyqlLLPAJcU5qF2vBFZ5phLkRzaYoHjHa+XpsK5gTEVS3Wj643Hx7DctZHn0N4/oVPnx9EynK7nCSx4BVp4PfxWQZ0sd3zeySrLSz24HFIPAgWihPcl2ceEPuvrSCJ1Jt0EdUje3nNeZtWBRhvQlmtDlEazSXb0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741086784; c=relaxed/simple; bh=Jd5+s9UK7OlmwNmHH9gaSVpQxKhbLJ2FBQ3g1aS3bko=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=taWeQBfu9x/bwWGWSaC2VSXUNtEX2EMCG69D2InlalZMxRVcy4MUafC9Z5rfSPeUBFfsgEyWbLJPTwQXza1DMP9OCzVoj3GwRRi6FKtJvuu8yubA+BjyY75F2NUMAQgqwg+Ir/SsCW1IxR3F3I1noPx3bbqg/Dtx1g1D8KJsWkc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1AE69FEC; Tue, 4 Mar 2025 03:13:16 -0800 (PST) Received: from e132581.cambridge.arm.com (e132581.arm.com [10.2.76.71]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 0E0093F5A1; Tue, 4 Mar 2025 03:12:59 -0800 (PST) From: Leo Yan To: Arnaldo Carvalho de Melo , Namhyung Kim , Ian Rogers , James Clark , Adrian Hunter , Jiri Olsa , "Liang, Kan" , Mark Rutland , Will Deacon , Mike Leach , Graham Woodward , Paschalis.Mpeis@arm.com, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Leo Yan Subject: [PATCH v4 05/12] perf script: Add not taken event for branch stack Date: Tue, 4 Mar 2025 11:12:33 +0000 Message-Id: <20250304111240.3378214-6-leo.yan@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250304111240.3378214-1-leo.yan@arm.com> References: <20250304111240.3378214-1-leo.yan@arm.com> 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 Content-Type: text/plain; charset="utf-8" The branch stack has an existed field for printing mispredict, extend the field for printing events and add support not-taken event. Reviewed-by: Ian Rogers Reviewed-by: James Clark Signed-off-by: Leo Yan --- tools/perf/builtin-script.c | 20 +++++++++++++------- tools/perf/util/branch.h | 3 ++- 2 files changed, 15 insertions(+), 8 deletions(-) diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index 8ca04293d335..d931c971a100 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -935,19 +935,25 @@ static int perf_sample__fprintf_start(struct perf_scr= ipt *script, return printed; } =20 -static inline char -mispred_str(struct branch_entry *br) +static inline size_t +bstack_event_str(struct branch_entry *br, char *buf, size_t sz) { - if (!(br->flags.mispred || br->flags.predicted)) - return '-'; + if (!(br->flags.mispred || br->flags.predicted || br->flags.not_taken)) + return snprintf(buf, sz, "-"); =20 - return br->flags.predicted ? 'P' : 'M'; + return snprintf(buf, sz, "%s%s", + br->flags.predicted ? "P" : "M", + br->flags.not_taken ? "N" : ""); } =20 static int print_bstack_flags(FILE *fp, struct branch_entry *br) { - return fprintf(fp, "/%c/%c/%c/%d/%s/%s ", - mispred_str(br), + char events[16] =3D { 0 }; + size_t pos; + + pos =3D bstack_event_str(br, events, sizeof(events)); + return fprintf(fp, "/%s/%c/%c/%d/%s/%s ", + pos < 0 ? "-" : events, br->flags.in_tx ? 'X' : '-', br->flags.abort ? 'A' : '-', br->flags.cycles, diff --git a/tools/perf/util/branch.h b/tools/perf/util/branch.h index b80c12c74bbb..7429530fa774 100644 --- a/tools/perf/util/branch.h +++ b/tools/perf/util/branch.h @@ -25,7 +25,8 @@ struct branch_flags { u64 spec:2; u64 new_type:4; u64 priv:3; - u64 reserved:31; + u64 not_taken:1; + u64 reserved:30; }; }; }; --=20 2.34.1