From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.15]) (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 C1C9158F099; Wed, 16 Sep 2026 16:31:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.15 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789576318; cv=none; b=WDXzWQ06DdyR+MTn8uhWb52c35tLrArKGmALbGGgxSxCJTRAMgxsYpDA2hk+HiCsTU8m8jZ1Sd7przD7cVfLyoKSyUqj7rBKth4Ql2OOytaC2ouN360Yf0KGUjF68GZ2GWLIN/Y5ZK0hRrQzzmaWL8+mchTag4pTm5pEFCmJZJ0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789576318; c=relaxed/simple; bh=vMLfQUg/AsChUnWlq923J9TEdFP0zaQ9emaQvmW4nR4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FpzYsjBVhMpDC1D+SLikQZB3jCpmNSFtesB/HACumJ3EuyUdUm70rvUN0rUij/iXP0jRLgqfb7LGblOoi+6+mX0NOhMpGtqp/WQYvB7ui6CXibVrZvCufViUKkB8XJUG+OULZKgTPcCwFtKUb/+F2bIKDJy4f1lVuAHm6V7083o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=MnjucdvK; arc=none smtp.client-ip=192.198.163.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="MnjucdvK" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1789576315; x=1821112315; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=vMLfQUg/AsChUnWlq923J9TEdFP0zaQ9emaQvmW4nR4=; b=MnjucdvKEpJgzhmeyHHVBAw9TjhgRQ5AmB4gsAjX/8jZUxCYTX/KjEMF I3/HNxZpnz+DR8duy5p85CmtQa2FVv2dRziISvXbsIsqqWNdOlTe2v3Mo yMzhSgxzJreAk0WTS9vPvYTQRqyf0VJj+t4HkDmEpbzy1uLT+VUDPlSwt kScV3wSLthleds07sCRQzw7Gk0+sc02ppg8Ci2wEWy/mLJhuXG0+RsvZT GOpUr8f/RqJtP966fFGwHvT6QHQVzZEQbtS8XM26NeENffbUgJNoH6m1w OL2SoCsGdWcFmv8LGk569CCXZo6GqhzM5AfFswnDdJzYx3fMsTvJuOCci A==; X-CSE-ConnectionGUID: MRa+FpccSceE/vsZ01ELJg== X-CSE-MsgGUID: 12psWYOiSg2jiIC7JWGG1w== X-IronPort-AV: E=McAfee;i="6800,10657,11905"; a="90093404" X-IronPort-AV: E=Sophos;i="6.27,103,1787036400"; d="scan'208";a="90093404" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Sep 2026 09:31:48 -0700 X-CSE-ConnectionGUID: b+rud5ANTGOGTrgMthOxRg== X-CSE-MsgGUID: xUg4M8muQoy7vynWLlUPdw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,103,1787036400"; d="scan'208";a="273363824" Received: from iherna2-mobl4.amr.corp.intel.com (HELO tfalcon-desk.attlocal.net) ([10.124.223.212]) by orviesa007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Sep 2026 09:31:46 -0700 From: Thomas Falcon To: Arnaldo Carvalho de Melo Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, Peter Zijlstra , Ingo Molnar , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , Dapeng Mi Subject: [PATCH v10 2/6] perf mem: Add support for printing PERF_MEM_LVLNUM_L0 Date: Wed, 16 Sep 2026 11:31:23 -0500 Message-ID: <20260916163127.318885-3-thomas.falcon@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260916163127.318885-1-thomas.falcon@intel.com> References: <20260916163127.318885-1-thomas.falcon@intel.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 From: Dapeng Mi Add support for printing PERF_MEM_LVLNUM_L0 in perf mem report. The L0 cache is newly added a small piece of cache which is the closest, lowest-latency memory cache tied directly to the execution pipeline. The table "Table 9-4. Data Source Field Encodings for Panther Cove and Coyote Cove Microarchitectures" in the ISE doc chapter "9.2.1 Panther Cove and Coyote Cove Microarchitectures Memory Auxiliary Field Layout"[1] indicates the code "01H" means the "L0 Hit - Minimal latency core cache hit. This request was satisfied by the L0 data cache." [1]: https://www.intel.com/content/www/us/en/content-details/922690/intel-architecture-instruction-set-extensions-programming-reference.html Assisted-by: Sashiko:gemini-3.1-pro-preview Reviewed-by: Dapeng Mi Reviewed-by: Ian Rogers Reviewed-by: Namhyung Kim Signed-off-by: Dapeng Mi Co-developed-by: Thomas Falcon Signed-off-by: Thomas Falcon --- v8: Updated developer tags v3: Included more information about the L0 cache in the commit message. --- tools/perf/Documentation/perf-record.txt | 2 +- tools/perf/util/bpf-filter.l | 1 + tools/perf/util/mem-events.c | 5 +++++ tools/perf/util/mem-events.h | 1 + 4 files changed, 8 insertions(+), 1 deletion(-) diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 388455f9b07b..bd2c56d8cdc0 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -212,7 +212,7 @@ OPTIONS The can be one of: (for any term) na, load, store, pfetch, exec (for mem_op) - l1, l2, l3, l4, cxl, io, any_cache, lfb, ram, pmem (for mem_lvl) + l0, l1, l2, l3, l4, cxl, io, any_cache, lfb, ram, pmem (for mem_lvl) na, none, hit, miss, hitm, fwd, peer (for mem_snoop) remote (for mem_remote) na, locked (for mem_locked) diff --git a/tools/perf/util/bpf-filter.l b/tools/perf/util/bpf-filter.l index 6aa65ade3385..1be9df6550fc 100644 --- a/tools/perf/util/bpf-filter.l +++ b/tools/perf/util/bpf-filter.l @@ -131,6 +131,7 @@ store { return constant(PERF_MEM_OP_STORE); } pfetch { return constant(PERF_MEM_OP_PFETCH); } exec { return constant(PERF_MEM_OP_EXEC); } +l0 { return constant(PERF_MEM_LVLNUM_L0); } l1 { return constant(PERF_MEM_LVLNUM_L1); } l2 { return constant(PERF_MEM_LVLNUM_L2); } l3 { return constant(PERF_MEM_LVLNUM_L3); } diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c index 4e490f9cd348..4fd48fd20055 100644 --- a/tools/perf/util/mem-events.c +++ b/tools/perf/util/mem-events.c @@ -391,6 +391,7 @@ static const char * const mem_lvlnum[] = { [PERF_MEM_LVLNUM_L4] = "L4", [PERF_MEM_LVLNUM_L2_MHB] = "L2 MHB", [PERF_MEM_LVLNUM_MSC] = "Memory-side Cache", + [PERF_MEM_LVLNUM_L0] = "L0", [PERF_MEM_LVLNUM_UNC] = "Uncached", [PERF_MEM_LVLNUM_CXL] = "CXL", [PERF_MEM_LVLNUM_IO] = "I/O", @@ -831,6 +832,8 @@ int mem_stat_index(const enum mem_stat_type mst, const u64 val) } case PERF_MEM_STAT_CACHE: switch (src.mem_lvl_num) { + case PERF_MEM_LVLNUM_L0: + return MEM_STAT_CACHE_L0; case PERF_MEM_LVLNUM_L1: return MEM_STAT_CACHE_L1; case PERF_MEM_LVLNUM_L2: @@ -915,6 +918,8 @@ const char *mem_stat_name(const enum mem_stat_type mst, const int idx) } case PERF_MEM_STAT_CACHE: switch (idx) { + case MEM_STAT_CACHE_L0: + return "L0"; case MEM_STAT_CACHE_L1: return "L1"; case MEM_STAT_CACHE_L2: diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h index 5b98076904b0..daa22748f9fe 100644 --- a/tools/perf/util/mem-events.h +++ b/tools/perf/util/mem-events.h @@ -109,6 +109,7 @@ enum mem_stat_op { }; enum mem_stat_cache { + MEM_STAT_CACHE_L0, MEM_STAT_CACHE_L1, MEM_STAT_CACHE_L2, MEM_STAT_CACHE_L3, -- 2.43.0