From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 9DF10263C75; Fri, 14 Feb 2025 11:19:55 +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=1739531997; cv=none; b=B8wVgJcWoFS+S/PRNTF8ySOgkl1JyXxV7J0dGRMJZaYznWcQuUNU5EQzY1bPpd3LbO5JHWtt3icifVOSwgdb0yfgSG10lRCsq7j6YL+6fG7Nf5OwdZghMLumnQYI55SnZxXFOLeFQLZOq94ds3N5RqutgFbIWzjc96h5aaa+b0w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739531997; c=relaxed/simple; bh=r8gyrfi5J3vQaZPLXw4DV64NxOOXdfmm1AsPL6wdOfM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=eVxO4e3paevW9dvwoZwccguBVbtH0kfA2EQHSGc/X8AbO9FpYiT/l/lJ46PVHxG9K1GX4czDw9HhTaCNt1qhE4UtLJfKf+ZtXx7PMPFvTO/PdMz09JoXweNLh1x1ancD0ocId20mqiit+JUJ/pEM+sKVpjdDDJcCd34lGmLxs7c= 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 48DFA113E; Fri, 14 Feb 2025 03:20:15 -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 2CC7A3F6A8; Fri, 14 Feb 2025 03:19:52 -0800 (PST) From: Leo Yan To: Arnaldo Carvalho de Melo , Namhyung Kim , Ian Rogers , James Clark , Peter Zijlstra , Ingo Molnar , Mark Rutland , Alexander Shishkin , Jiri Olsa , Adrian Hunter , "Liang, Kan" , John Garry , 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 v2 03/11] perf script: Separate events from branch types Date: Fri, 14 Feb 2025 11:19:28 +0000 Message-Id: <20250214111936.15168-4-leo.yan@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250214111936.15168-1-leo.yan@arm.com> References: <20250214111936.15168-1-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: 8bit Branch types and events are two different things. A branch type can be a conditional branch, an indirect branch, a procedure call, a return, or an exception taken, etc. The extra event information is provided for what happens during a branch, e.g. if a branch is mispredicted or not taken (specific to conditional branches). To deliver information about branches, this commit separates events from branch types. It parses branch types first, then appends event strings embraced by the '/' character. If multiple events occur, the events is separated with a comma (,). Also add a minor improvement by adding char 'm' in char array for branch mispredict event. Below are extracted sample flags. Before: branch: br miss instructions: br miss After: branch: jmp/miss/ instructions: jmp/miss/ Reviewed-by: Ian Rogers Signed-off-by: Leo Yan --- tools/perf/util/event.h | 5 +++- tools/perf/util/trace-event-scripting.c | 36 ++++++++++++++++++++++--- 2 files changed, 37 insertions(+), 4 deletions(-) diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h index cd75efc09834..962fbc1714cf 100644 --- a/tools/perf/util/event.h +++ b/tools/perf/util/event.h @@ -69,7 +69,7 @@ enum { PERF_IP_FLAG_BRANCH_MISS = 1ULL << 15, }; -#define PERF_IP_FLAG_CHARS "bcrosyiABExghDt" +#define PERF_IP_FLAG_CHARS "bcrosyiABExghDtm" #define PERF_ADDITIONAL_STATE_MASK \ (PERF_IP_FLAG_IN_TX | \ @@ -90,6 +90,9 @@ enum { PERF_IP_FLAG_VMENTRY |\ PERF_IP_FLAG_VMEXIT) +#define PERF_IP_FLAG_BRACH_EVENT_MASK \ + PERF_IP_FLAG_BRANCH_MISS + #define PERF_MEM_DATA_SRC_NONE \ (PERF_MEM_S(OP, NA) |\ PERF_MEM_S(LVL, NA) |\ diff --git a/tools/perf/util/trace-event-scripting.c b/tools/perf/util/trace-event-scripting.c index 712ba3a51bbe..55d7e4e612d5 100644 --- a/tools/perf/util/trace-event-scripting.c +++ b/tools/perf/util/trace-event-scripting.c @@ -309,7 +309,14 @@ static const struct { {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_END, "tr end"}, {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_VMENTRY, "vmentry"}, {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_VMEXIT, "vmexit"}, - {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_BRANCH_MISS, "br miss"}, + {0, NULL} +}; + +static const struct { + u32 flags; + const char *name; +} branch_events[] = { + {PERF_IP_FLAG_BRANCH_MISS, "miss"}, {0, NULL} }; @@ -317,8 +324,9 @@ static int sample_flags_to_name(u32 flags, char *str, size_t size) { int i; const char *prefix; - int pos = 0, ret; + int pos = 0, ret, ev_idx = 0; u32 xf = flags & PERF_ADDITIONAL_STATE_MASK; + u32 types, events; char xs[16] = { 0 }; /* Clear additional state bits */ @@ -338,8 +346,9 @@ static int sample_flags_to_name(u32 flags, char *str, size_t size) flags &= ~(PERF_IP_FLAG_TRACE_BEGIN | PERF_IP_FLAG_TRACE_END); + types = flags & ~PERF_IP_FLAG_BRACH_EVENT_MASK; for (i = 0; sample_flags[i].name; i++) { - if (sample_flags[i].flags != flags) + if (sample_flags[i].flags != types) continue; ret = snprintf(str + pos, size - pos, "%s", sample_flags[i].name); @@ -349,6 +358,27 @@ static int sample_flags_to_name(u32 flags, char *str, size_t size) break; } + events = flags & PERF_IP_FLAG_BRACH_EVENT_MASK; + for (i = 0; branch_events[i].name; i++) { + if (!(branch_events[i].flags & events)) + continue; + + ret = snprintf(str + pos, size - pos, !ev_idx ? "/%s" : ",%s", + branch_events[i].name); + if (ret < 0) + return ret; + pos += ret; + ev_idx++; + } + + /* Add an end character '/' for events */ + if (ev_idx) { + ret = snprintf(str + pos, size - pos, "/"); + if (ret < 0) + return ret; + pos += ret; + } + if (!xf) return pos; -- 2.34.1