From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dl1-f74.google.com (mail-dl1-f74.google.com [74.125.82.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 053B4346AC3 for ; Tue, 27 Jan 2026 18:46:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.74 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769539572; cv=none; b=spMMidofbHQZkIQQThffPi8Ceb1lIo2LQijnoUgCVSGRXTe0V6kiH8sgzGhhcOiacjU1pwDhGqMDub+WhaONo08nFDXF3dDXnkDn+1QU0scUlxi5gi8L7PBxJYl2nWtBCA4nhUPGIh4BIgKCkwhn654Q82R8f2DKjfPCbTliXy4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769539572; c=relaxed/simple; bh=qrxmlP6PqMfaXzM0qAusjhd39JJ/O+hNC8cojlyi1NY=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=mDcd5qvTR0ad1Pn95rT1Ob9vOV4LaWf8V2eSEZMVdItMrIGtz5xrqcb+iCLJhUKSurl7jTou20QZ2D6bniACee2iUnssSLwvZJYuyu31XVgFgYxCg1xyE+OdTWJEeuSaS6PIbxNRokBYi7Z3/GRF5F0hyWfbNjRjj8k5JVGBIqU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=s4Gxchfx; arc=none smtp.client-ip=74.125.82.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="s4Gxchfx" Received: by mail-dl1-f74.google.com with SMTP id a92af1059eb24-1233893db9fso25892614c88.0 for ; Tue, 27 Jan 2026 10:46:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1769539567; x=1770144367; darn=vger.kernel.org; h=to:from:subject:message-id:references:mime-version:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=7uxdfHuFFOhN+dRexF0ufH2t107HB/W3xh1le+g84b8=; b=s4GxchfxMNaA5VHVTRb8am1Zi3NfoWkdcVEAao0X7ArcwPdhHcoM8iDAFrUqDG9RSk Y3YKFkdA5lvoMCapLJBYU7d7Yc7O7e55LNYUpTJbstwVjiFiIvTY41ckex8Z0aM9lvco QcFDRiPDyqOFps6wX1s/X+gOyNiGXwulxz9/GurxuGdn/4jXdP6IuJQjHogve/jaeeuz yiU8ahF4L2STYMmsS1VWoe6HWs0paxRaUPnQaq/phQHQL9JoLt/WTIudfWYfM5HdvLIT 1NFhtYxPZwiAmsfetbb9piVEKzkIA1ON090OjVLwnCng2hocRdxh5EmMiL44HbpiSnAY KclQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769539567; x=1770144367; h=to:from:subject:message-id:references:mime-version:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=7uxdfHuFFOhN+dRexF0ufH2t107HB/W3xh1le+g84b8=; b=LduA4kk9kdOGpI8qzFSbGCwYHA2nXKd5lgjGWoWeb7yyuvLnefk0hIFuJdR8njkR+e mpSEdGJ0HtgaHgvEkUZCeCI6W0PDunFa2c4lUJmxZCdTo0x7/HDkygn9dv0GYSBXUZJV 2kS0Fia4PhMHEbGkurI7cmlC0WESV794v30w6ZVgaH4xZD+I17ny/LhkAYnI55VxZYdt nFcfuWe6a8YytydrqLp7n8BPhFXyGDulOYQWz+KJtstsrIdr46/hva0ut/L1Q/qHHijT GBxNHABIH+4dO5LtlpkRbqDpQi6+gXksNiuNyZQJerlYY2W5uuKF73quZYkrw+iWTT/X grDw== X-Forwarded-Encrypted: i=1; AJvYcCVYuWbgJV7Fe5krHvZ+oJdwdERNr9TqvkvdXPd79AgUf/62GoA7DHXZ4zwiGhdmFolr/HSnNn0tpu8dLac=@vger.kernel.org X-Gm-Message-State: AOJu0Yxrg+cxxdGnnFxJ4MM9KZ1NEGNUilZpQsXc/PpA9yg0dKC7CNOp Y6CFq1R9R9j3umnPwZEapDKl5zFM97D8bkvvDwrxEEcRQuL96iPE0hCv3wQTKiT0nVimWyhht9T ra6bKx6zPnw== X-Received: from dlbpm5.prod.google.com ([2002:a05:7022:3885:b0:11d:cfca:1df5]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7022:2487:b0:11b:9386:a3cb with SMTP id a92af1059eb24-124a00e3b63mr1179484c88.44.1769539566952; Tue, 27 Jan 2026 10:46:06 -0800 (PST) Date: Tue, 27 Jan 2026 10:44:52 -0800 In-Reply-To: <20260127184506.3059493-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260127184506.3059493-1-irogers@google.com> X-Mailer: git-send-email 2.52.0.457.g6b5491de43-goog Message-ID: <20260127184506.3059493-22-irogers@google.com> Subject: [PATCH v11 21/35] perf jevents: Add L2 metrics for Intel From: Ian Rogers To: Adrian Hunter , Alexander Shishkin , Arnaldo Carvalho de Melo , Benjamin Gray , Caleb Biggers , Edward Baker , Ian Rogers , Ingo Molnar , James Clark , Jing Zhang , Jiri Olsa , John Garry , Leo Yan , Namhyung Kim , Perry Taylor , Peter Zijlstra , Sandipan Das , Thomas Falcon , Weilin Wang , Xu Yang , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Give a breakdown of various L2 counters as metrics, including totals, reads, hardware prefetcher, RFO, code and evictions. Tested-by: Thomas Falcon Signed-off-by: Ian Rogers --- tools/perf/pmu-events/intel_metrics.py | 170 +++++++++++++++++++++++++ 1 file changed, 170 insertions(+) diff --git a/tools/perf/pmu-events/intel_metrics.py b/tools/perf/pmu-events/intel_metrics.py index 7fcc0a1c544d..d190d97f4aff 100755 --- a/tools/perf/pmu-events/intel_metrics.py +++ b/tools/perf/pmu-events/intel_metrics.py @@ -263,6 +263,175 @@ def IntelBr(): description="breakdown of retired branch instructions") +def IntelL2() -> Optional[MetricGroup]: + try: + DC_HIT = Event("L2_RQSTS.DEMAND_DATA_RD_HIT") + except: + return None + try: + DC_MISS = Event("L2_RQSTS.DEMAND_DATA_RD_MISS") + l2_dmnd_miss = DC_MISS + l2_dmnd_rd_all = DC_MISS + DC_HIT + except: + DC_ALL = Event("L2_RQSTS.ALL_DEMAND_DATA_RD") + l2_dmnd_miss = DC_ALL - DC_HIT + l2_dmnd_rd_all = DC_ALL + l2_dmnd_mrate = d_ratio(l2_dmnd_miss, interval_sec) + l2_dmnd_rrate = d_ratio(l2_dmnd_rd_all, interval_sec) + + DC_PFH = None + DC_PFM = None + l2_pf_all = None + l2_pf_mrate = None + l2_pf_rrate = None + try: + DC_PFH = Event("L2_RQSTS.PF_HIT") + DC_PFM = Event("L2_RQSTS.PF_MISS") + l2_pf_all = DC_PFH + DC_PFM + l2_pf_mrate = d_ratio(DC_PFM, interval_sec) + l2_pf_rrate = d_ratio(l2_pf_all, interval_sec) + except: + pass + + DC_RFOH = None + DC_RFOM = None + l2_rfo_all = None + l2_rfo_mrate = None + l2_rfo_rrate = None + try: + DC_RFOH = Event("L2_RQSTS.RFO_HIT") + DC_RFOM = Event("L2_RQSTS.RFO_MISS") + l2_rfo_all = DC_RFOH + DC_RFOM + l2_rfo_mrate = d_ratio(DC_RFOM, interval_sec) + l2_rfo_rrate = d_ratio(l2_rfo_all, interval_sec) + except: + pass + + DC_CH = None + try: + DC_CH = Event("L2_RQSTS.CODE_RD_HIT") + except: + pass + DC_CM = Event("L2_RQSTS.CODE_RD_MISS") + DC_IN = Event("L2_LINES_IN.ALL") + DC_OUT_NS = None + DC_OUT_S = None + l2_lines_out = None + l2_out_rate = None + wbn = None + isd = None + try: + DC_OUT_NS = Event("L2_LINES_OUT.NON_SILENT", + "L2_LINES_OUT.DEMAND_DIRTY", + "L2_LINES_IN.S") + DC_OUT_S = Event("L2_LINES_OUT.SILENT", + "L2_LINES_OUT.DEMAND_CLEAN", + "L2_LINES_IN.I") + if DC_OUT_S.name == "L2_LINES_OUT.SILENT" and ( + args.model.startswith("skylake") or + args.model == "cascadelakex"): + DC_OUT_S.name = "L2_LINES_OUT.SILENT/any/" + # bring is back to per-CPU + l2_s = Select(DC_OUT_S / 2, Literal("#smt_on"), DC_OUT_S) + l2_ns = DC_OUT_NS + l2_lines_out = l2_s + l2_ns + l2_out_rate = d_ratio(l2_lines_out, interval_sec) + nlr = max(l2_ns - DC_WB_U - DC_WB_D, 0) + wbn = d_ratio(nlr, interval_sec) + isd = d_ratio(l2_s, interval_sec) + except: + pass + DC_OUT_U = None + l2_pf_useless = None + l2_useless_rate = None + try: + DC_OUT_U = Event("L2_LINES_OUT.USELESS_HWPF") + l2_pf_useless = DC_OUT_U + l2_useless_rate = d_ratio(l2_pf_useless, interval_sec) + except: + pass + DC_WB_U = None + DC_WB_D = None + wbu = None + wbd = None + try: + DC_WB_U = Event("IDI_MISC.WB_UPGRADE") + DC_WB_D = Event("IDI_MISC.WB_DOWNGRADE") + wbu = d_ratio(DC_WB_U, interval_sec) + wbd = d_ratio(DC_WB_D, interval_sec) + except: + pass + + l2_lines_in = DC_IN + l2_code_all = (DC_CH + DC_CM) if DC_CH else None + l2_code_rate = d_ratio(l2_code_all, interval_sec) if DC_CH else None + l2_code_miss_rate = d_ratio(DC_CM, interval_sec) + l2_in_rate = d_ratio(l2_lines_in, interval_sec) + + return MetricGroup("lpm_l2", [ + MetricGroup("lpm_l2_totals", [ + Metric("lpm_l2_totals_in", "L2 cache total in per second", + l2_in_rate, "In/s"), + Metric("lpm_l2_totals_out", "L2 cache total out per second", + l2_out_rate, "Out/s") if l2_out_rate else None, + ]), + MetricGroup("lpm_l2_rd", [ + Metric("lpm_l2_rd_hits", "L2 cache data read hits", + d_ratio(DC_HIT, l2_dmnd_rd_all), "100%"), + Metric("lpm_l2_rd_hits", "L2 cache data read hits", + d_ratio(l2_dmnd_miss, l2_dmnd_rd_all), "100%"), + Metric("lpm_l2_rd_requests", "L2 cache data read requests per second", + l2_dmnd_rrate, "requests/s"), + Metric("lpm_l2_rd_misses", "L2 cache data read misses per second", + l2_dmnd_mrate, "misses/s"), + ]), + MetricGroup("lpm_l2_hwpf", [ + Metric("lpm_l2_hwpf_hits", "L2 cache hardware prefetcher hits", + d_ratio(DC_PFH, l2_pf_all), "100%"), + Metric("lpm_l2_hwpf_misses", "L2 cache hardware prefetcher misses", + d_ratio(DC_PFM, l2_pf_all), "100%"), + Metric("lpm_l2_hwpf_useless", "L2 cache hardware prefetcher useless prefetches per second", + l2_useless_rate, "100%") if l2_useless_rate else None, + Metric("lpm_l2_hwpf_requests", "L2 cache hardware prefetcher requests per second", + l2_pf_rrate, "100%"), + Metric("lpm_l2_hwpf_misses", "L2 cache hardware prefetcher misses per second", + l2_pf_mrate, "100%"), + ]) if DC_PFH else None, + MetricGroup("lpm_l2_rfo", [ + Metric("lpm_l2_rfo_hits", "L2 cache request for ownership (RFO) hits", + d_ratio(DC_RFOH, l2_rfo_all), "100%"), + Metric("lpm_l2_rfo_misses", "L2 cache request for ownership (RFO) misses", + d_ratio(DC_RFOM, l2_rfo_all), "100%"), + Metric("lpm_l2_rfo_requests", "L2 cache request for ownership (RFO) requests per second", + l2_rfo_rrate, "requests/s"), + Metric("lpm_l2_rfo_misses", "L2 cache request for ownership (RFO) misses per second", + l2_rfo_mrate, "misses/s"), + ]) if DC_RFOH else None, + MetricGroup("lpm_l2_code", [ + Metric("lpm_l2_code_hits", "L2 cache code hits", + d_ratio(DC_CH, l2_code_all), "100%") if DC_CH else None, + Metric("lpm_l2_code_misses", "L2 cache code misses", + d_ratio(DC_CM, l2_code_all), "100%") if DC_CH else None, + Metric("lpm_l2_code_requests", "L2 cache code requests per second", + l2_code_rate, "requests/s") if DC_CH else None, + Metric("lpm_l2_code_misses", "L2 cache code misses per second", + l2_code_miss_rate, "misses/s"), + ]), + MetricGroup("lpm_l2_evict", [ + MetricGroup("lpm_l2_evict_mef_lines", [ + Metric("lpm_l2_evict_mef_lines_l3_hot_lru", "L2 evictions M/E/F lines L3 hot LRU per second", + wbu, "HotLRU/s") if wbu else None, + Metric("lpm_l2_evict_mef_lines_l3_norm_lru", "L2 evictions M/E/F lines L3 normal LRU per second", + wbn, "NormLRU/s") if wbn else None, + Metric("lpm_l2_evict_mef_lines_dropped", "L2 evictions M/E/F lines dropped per second", + wbd, "dropped/s") if wbd else None, + Metric("lpm_l2_evict_is_lines_dropped", "L2 evictions I/S lines dropped per second", + isd, "dropped/s") if isd else None, + ]), + ]), + ], description="L2 data cache analysis") + + def IntelPorts() -> Optional[MetricGroup]: pipeline_events = json.load( open(f"{_args.events_path}/x86/{_args.model}/pipeline.json")) @@ -386,6 +555,7 @@ def main() -> None: Smi(), Tsx(), IntelBr(), + IntelL2(), IntelPorts(), IntelSwpf(), ]) -- 2.52.0.457.g6b5491de43-goog