From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.14]) (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 733BE13AD13; Thu, 8 Aug 2024 19:32:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.14 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723145574; cv=none; b=kpmgZC9CG6bfx16nkKVUIe2CiNP7OMnJ95GxgNUcy1ctQuMy0S7QHTz6tGWaGmxrz5Gphx842p1GCTBKJT9XtrIhMugenP2K9YCHXFtiF8EkEy+tE7SFs0tDs1rXAIcjZAaCbKws+9r7wLpQ4+JJLq70pZgcm8hvH4y5n4YNHUA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723145574; c=relaxed/simple; bh=Oh2stVbFry/MVt+YSMlLptgG01a10K5iy6e1t0emd2U=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version:Content-Type; b=kIWCbCYXN7pKWCkpCTaUGPX/f/TGDbImgESxBVGkiK1OlFImwet/ERzG+iWGuR3LPGGB4KTa8sYSJM+IE0ibaChdEKWp0WaBIIlGkMnpolSI5EcoenrvVnngtXThrlFPT64YfB5nWanZoJI5l6O/wjtvEZfqNQLsVFEloiy32UY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=XAXIxx0q; arc=none smtp.client-ip=198.175.65.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="XAXIxx0q" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1723145573; x=1754681573; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=Oh2stVbFry/MVt+YSMlLptgG01a10K5iy6e1t0emd2U=; b=XAXIxx0q6GMMJWkwSVsHIroIzy0DTUlTCUPZjOgduqqL8ZCMNERo6c7o 2MhAQZA4OzauH7X0X+zD5e4Oup9SgsAxDmX79wXb+Oda4/30gNIvQUxeK 47mcOYbZXUBOyIDj0QiJy5Egs9V4c8Uu0w5NbRsfhUPY6sKJUvyWtTgMT ZzMEha90bgpwS+tOK6kPJoy6SeXfANx7lRjjshHZNH6q3/UVdhH2Vza9I KbPoZDkH7md25vTXZUZLwW8Qgairm3v4KYuJXpBeR5ixehmN2zyhH8JgM Dw5uFhKdDvY+Ks5k5Y3XxFVCO5ktzfzK0rH+SWOxYEYwSkv6GZtzJExP8 g==; X-CSE-ConnectionGUID: uah0a2dDTYKb2RoUWD1mJw== X-CSE-MsgGUID: ZFO5qKiOTZKtCMOV/T0dlw== X-IronPort-AV: E=McAfee;i="6700,10204,11158"; a="25091686" X-IronPort-AV: E=Sophos;i="6.09,274,1716274800"; d="scan'208";a="25091686" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Aug 2024 12:32:50 -0700 X-CSE-ConnectionGUID: 33l1AyZQR/Crtt5xK8CUEw== X-CSE-MsgGUID: fmXgPB41QOmcR6rPEnakKw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.09,274,1716274800"; d="scan'208";a="57402574" Received: from kanliang-dev.jf.intel.com ([10.165.154.102]) by fmviesa010.fm.intel.com with ESMTP; 08 Aug 2024 12:32:50 -0700 From: kan.liang@linux.intel.com To: acme@kernel.org, namhyung@kernel.org, irogers@google.com, peterz@infradead.org, mingo@kernel.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Cc: adrian.hunter@intel.com, ak@linux.intel.com, eranian@google.com, Kan Liang Subject: [PATCH V2 0/9] Support branch counters in block annotation Date: Thu, 8 Aug 2024 12:33:15 -0700 Message-Id: <20240808193324.2027665-1-kan.liang@linux.intel.com> X-Mailer: git-send-email 2.38.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Kan Liang Changes since V1: - Add Acked-by from Namhyung for patch 1 and 2. - Use array to replace pointer to store the abbr name. (Patch 5) (Namhyung) - Add -v to print the value like "A=,B=", rather than histogram. (Patch 6) (Namhyung) The branch counters logging (A.K.A LBR event logging) introduces a per-counter indication of precise event occurrences in LBRs. It can provide a means to attribute exposed retirement latency to combinations of events across a block of instructions. It also provides a means of attributing Timed LBR latencies to events. The kernel support and basic perf tool support have been merged. https://lore.kernel.org/lkml/20231025201626.3000228-1-kan.liang@linux.intel.com/ This series is to provide advanced perf tool support via adding the branch counters information in block annotation. It can further facilitate the analysis of branch blocks. The patch 1 and 2 are to fix two existing issues of --total-cycles and the branch counters feature. The patch 3-9 are the advanced perf tool support. Here are some examples. perf annotation: $perf record -e "{branch-instructions:ppp,branch-misses}:S" -j any,counter $perf report --total-cycles --stdio # To display the perf.data header info, please use --header/--header-only options. # # # Total Lost Samples: 0 # # Samples: 1M of events 'anon group { branch-instructions:ppp, branch-misses }' # Event count (approx.): 1610046 # # Branch counter abbr list: # branch-instructions:ppp = A # branch-misses = B # '-' No event occurs # '+' Event occurrences may be lost due to branch counter saturated # # Sampled Cycles% Sampled Cycles Avg Cycles% Avg Cycles Branch Counter [Program Block Range] # ............... .............. ........... .......... ...................... .. # 57.55% 2.5M 0.00% 3 |A |- | ... 25.27% 1.1M 0.00% 2 |AA |- | ... 15.61% 667.2K 0.00% 1 |A |- | ... 0.16% 6.9K 0.81% 575 |A |- | ... 0.16% 6.8K 1.38% 977 |AA |- | ... 0.16% 6.8K 0.04% 28 |AA |B | ... 0.15% 6.6K 1.33% 946 |A |- | ... 0.11% 4.5K 0.06% 46 |AAA+|- | ... With -v applied, $perf report --total-cycles --stdio -v # Sampled Cycles% Sampled Cycles Avg Cycles% Avg Cycles Branch Counter [Program Block Range] # ............... .............. ........... .......... ...................... .................. # 57.55% 2.5M 0.00% 3 A=1 ,B=- ... 25.27% 1.1M 0.00% 2 A=2 ,B=- ... 15.61% 667.2K 0.00% 1 A=1 ,B=- ... 0.16% 6.9K 0.81% 575 A=1 ,B=- ... 0.16% 6.8K 1.38% 977 A=2 ,B=- ... 0.16% 6.8K 0.04% 28 A=2 ,B=1 ... 0.15% 6.6K 1.33% 946 A=1 ,B=- ... 0.11% 4.5K 0.06% 46 A=3+,B=- ... (The below output is in the TUI mode. Users can press 'B' to display the Branch counter abbr list.) Samples: 1M of events 'anon group { branch-instructions:ppp, branch-misses }', 4000 Hz, Event count (approx.): f3 /home/sdp/test/tchain_edit [Percent: local period] Percent │ IPC Cycle Branch Counter (Average IPC: 1.39, IPC Coverage: 29.4%) │ 0000000000401755 : 0.00 0.00 │ endbr64 │ push %rbp │ mov %rsp,%rbp │ movl $0x0,-0x4(%rbp) 0.00 0.00 │1.33 3 |A |- | ↓ jmp 25 11.03 11.03 │ 11: mov -0x4(%rbp),%eax │ and $0x1,%eax │ test %eax,%eax 17.13 17.13 │2.41 1 |A |- | ↓ je 21 │ addl $0x1,-0x4(%rbp) 21.84 21.84 │2.22 2 |AA |- | ↓ jmp 25 17.13 17.13 │ 21: addl $0x1,-0x4(%rbp) 21.84 21.84 │ 25: cmpl $0x270f,-0x4(%rbp) 11.03 11.03 │0.61 3 |A |- | ↑ jle 11 │ nop │ pop %rbp 0.00 0.00 │0.24 20 |AA |B | ← ret perf script: $perf script -F +brstackinsn,+brcntr # Branch counter abbr list: # branch-instructions:ppp = A # branch-misses = B # '-' No event occurs # '+' Event occurrences may be lost due to branch counter saturated tchain_edit 332203 3366329.405674: 53030 branch-instructions:ppp: 401781 f3+0x2c (home/sdp/test/tchain_edit) f3+31: 0000000000401774 insn: eb 04 br_cntr: AA # PRED 5 cycles [5] 000000000040177a insn: 81 7d fc 0f 27 00 00 0000000000401781 insn: 7e e3 br_cntr: A # PRED 1 cycles [6] 2.00 IPC 0000000000401766 insn: 8b 45 fc 0000000000401769 insn: 83 e0 01 000000000040176c insn: 85 c0 $perf script -F +brstackinsn,+brcntr -v tchain_edit 332203 3366329.405674: 53030 branch-instructions:ppp: 401781 f3+0x2c (/home/sdp/test/tchain_edit) f3+31: 0000000000401774 insn: eb 04 br_cntr: branch-instructions:ppp 2 branch-misses 0 # PRED 5 cycles [5] 000000000040177a insn: 81 7d fc 0f 27 00 00 0000000000401781 insn: 7e e3 br_cntr: branch-instructions:ppp 1 branch-misses 0 # PRED 1 cycles [6] 2.00 IPC 0000000000401766 insn: 8b 45 fc 0000000000401769 insn: 83 e0 01 000000000040176c insn: 85 c0 Kan Liang (9): perf report: Fix --total-cycles --stdio output error perf report: Remove the first overflow check for branch counters perf evlist: Save branch counters information perf annotate: Save branch counters for each block perf evsel: Assign abbr name for the branch counter events perf report: Display the branch counter histogram perf annotate: Display the branch counter histogram perf script: Add branch counters perf test: Add new test cases for the branch counter feature tools/perf/Documentation/perf-report.txt | 1 + tools/perf/Documentation/perf-script.txt | 2 +- tools/perf/builtin-annotate.c | 13 +- tools/perf/builtin-diff.c | 8 +- tools/perf/builtin-report.c | 25 ++- tools/perf/builtin-script.c | 69 ++++++- tools/perf/builtin-top.c | 4 +- tools/perf/tests/shell/record.sh | 17 +- tools/perf/ui/browsers/annotate.c | 18 +- tools/perf/ui/browsers/hists.c | 18 +- tools/perf/util/annotate.c | 253 +++++++++++++++++++++-- tools/perf/util/annotate.h | 24 ++- tools/perf/util/block-info.c | 66 +++++- tools/perf/util/block-info.h | 8 +- tools/perf/util/branch.h | 1 + tools/perf/util/disasm.c | 1 + tools/perf/util/evlist.c | 68 ++++++ tools/perf/util/evlist.h | 2 + tools/perf/util/evsel.c | 15 +- tools/perf/util/evsel.h | 14 ++ tools/perf/util/hist.c | 5 +- tools/perf/util/hist.h | 2 +- tools/perf/util/machine.c | 3 + 23 files changed, 567 insertions(+), 70 deletions(-) -- 2.38.1