From patchwork Fri Aug 11 14:39:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Clark X-Patchwork-Id: 13350978 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 85B3EC001DB for ; Fri, 11 Aug 2023 14:45:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Ei1jt8WTRWrkYNtHCljQT/PRiAWYVil8WlZko/pUaRo=; b=2Rl5a9YVu034n0 TJ4aZ0Ecv0GCImRaDDwSVyHMyPVC2iPlaIRJL7WSWl3lnu1bMhxdZFJXQavwyFOxpk8iAUc4tr/g7 9d9ALEGAfAVz3ysP/NzOlWu1OoqenVLLzxtDo7tz+Er7v4ulG1Bau5dshgEO1Yc/N8bfLMc6eKr+g 2g2FkShec2UGyAcr+baY+HIwqTNvExVms888iQP4cXw8Ia+YkkE6JNFGGdMjEc+MaCo5gRuC10CTY lOVpPrFDkTCLYajRQRmNdLRqZjRTQPhcDKpkDkPcff/YJ8TmtxMi8KJOAPulQLvZ5rt0rVm1lXrkE dZWIt16xrguiYevpGPHQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qUTOI-00AreO-13; Fri, 11 Aug 2023 14:45:26 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qUTOE-00ArdU-30 for linux-arm-kernel@lists.infradead.org; Fri, 11 Aug 2023 14:45:25 +0000 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 8FDA4113E; Fri, 11 Aug 2023 07:46:03 -0700 (PDT) Received: from e127643.broadband (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 00E043F64C; Fri, 11 Aug 2023 07:45:17 -0700 (PDT) From: James Clark To: linux-perf-users@vger.kernel.org, irogers@google.com, john.g.garry@oracle.com, renyu.zj@linux.alibaba.com Cc: James Clark , Will Deacon , Mike Leach , Leo Yan , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Adrian Hunter , Suzuki K Poulose , Kan Liang , Kajol Jain , Nick Forrington , Eduard Zingerman , Sohom Datta , Rob Herring , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org Subject: [PATCH v5 5/6] perf vendor events arm64: Update stall_slot workaround for N2 r0p3 Date: Fri, 11 Aug 2023 15:39:22 +0100 Message-Id: <20230811144017.491628-6-james.clark@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230811144017.491628-1-james.clark@arm.com> References: <20230811144017.491628-1-james.clark@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230811_074523_019624_B2C140D4 X-CRM114-Status: GOOD ( 22.57 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org N2 r0p3 doesn't require the workaround [1], so gating on (#slots - 5) no longer works because all N2s have 5 slots. Add a new expression builtin that allows calling strcmp_cpuid_str() and comparing CPUIDs in metric formulas. In this case, the commented formula looks like this: strcmp_cpuid_str(0x410fd493) # greater than or equal to N2 r0p3 | strcmp_cpuid_str(0x410fd490) ^ 1 # OR NOT any version of N2 [1]: https://gitlab.arm.com/telemetry-solution/telemetry-solution/-/blob/main/data/pmu/cpu/neoverse/neoverse-n2-r0p3.json Signed-off-by: James Clark --- tools/perf/arch/arm64/util/pmu.c | 18 +----------------- .../arch/arm64/arm/neoverse-n2-v2/metrics.json | 8 ++++---- tools/perf/pmu-events/metric.py | 17 +++++++++++++++-- tools/perf/util/expr.c | 18 ++++++++++++++++++ tools/perf/util/expr.h | 1 + tools/perf/util/expr.l | 1 + tools/perf/util/expr.y | 8 +++++++- tools/perf/util/pmu.c | 17 +++++++++++++++++ tools/perf/util/pmu.h | 1 + 9 files changed, 65 insertions(+), 24 deletions(-) diff --git a/tools/perf/arch/arm64/util/pmu.c b/tools/perf/arch/arm64/util/pmu.c index 561de0cb6b95..3f3c6c691ea5 100644 --- a/tools/perf/arch/arm64/util/pmu.c +++ b/tools/perf/arch/arm64/util/pmu.c @@ -2,28 +2,12 @@ #include #include "../../../util/cpumap.h" +#include "../../../util/header.h" #include "../../../util/pmu.h" #include "../../../util/pmus.h" #include #include -static struct perf_pmu *pmu__find_core_pmu(void) -{ - struct perf_pmu *pmu = NULL; - - while ((pmu = perf_pmus__scan_core(pmu))) { - /* - * The cpumap should cover all CPUs. Otherwise, some CPUs may - * not support some events or have different event IDs. - */ - if (RC_CHK_ACCESS(pmu->cpus)->nr != cpu__max_cpu().cpu) - return NULL; - - return pmu; - } - return NULL; -} - const struct pmu_metrics_table *pmu_metrics_table__find(void) { struct perf_pmu *pmu = pmu__find_core_pmu(); diff --git a/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2-v2/metrics.json b/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2-v2/metrics.json index 8ad15b726dca..9757cc178bdf 100644 --- a/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2-v2/metrics.json +++ b/tools/perf/pmu-events/arch/arm64/arm/neoverse-n2-v2/metrics.json @@ -1,15 +1,15 @@ [ { "ArchStdEvent": "FRONTEND_BOUND", - "MetricExpr": "((stall_slot_frontend) if (#slots - 5) else (stall_slot_frontend - cpu_cycles)) / (#slots * cpu_cycles)" + "MetricExpr": "((stall_slot_frontend) if (strcmp_cpuid_str(0x410fd493) | strcmp_cpuid_str(0x410fd490) ^ 1) else (stall_slot_frontend - cpu_cycles)) / (#slots * cpu_cycles)" }, { "ArchStdEvent": "BAD_SPECULATION", - "MetricExpr": "(1 - op_retired / op_spec) * (1 - (stall_slot if (#slots - 5) else (stall_slot - cpu_cycles)) / (#slots * cpu_cycles))" + "MetricExpr": "(1 - op_retired / op_spec) * (1 - (stall_slot if (strcmp_cpuid_str(0x410fd493) | strcmp_cpuid_str(0x410fd490) ^ 1) else (stall_slot - cpu_cycles)) / (#slots * cpu_cycles))" }, { "ArchStdEvent": "RETIRING", - "MetricExpr": "(op_retired / op_spec) * (1 - (stall_slot if (#slots - 5) else (stall_slot - cpu_cycles)) / (#slots * cpu_cycles))" + "MetricExpr": "(op_retired / op_spec) * (1 - (stall_slot if (strcmp_cpuid_str(0x410fd493) | strcmp_cpuid_str(0x410fd490) ^ 1) else (stall_slot - cpu_cycles)) / (#slots * cpu_cycles))" }, { "ArchStdEvent": "BACKEND_BOUND" @@ -201,7 +201,7 @@ "ScaleUnit": "100%" }, { - "MetricExpr": "OP_RETIRED / OP_SPEC * (1 - (STALL_SLOT if (#slots - 5) else (STALL_SLOT - CPU_CYCLES)) / (#slots * CPU_CYCLES))", + "MetricExpr": "OP_RETIRED / OP_SPEC * (1 - (STALL_SLOT if (strcmp_cpuid_str(0x410fd493) | strcmp_cpuid_str(0x410fd490) ^ 1) else (STALL_SLOT - CPU_CYCLES)) / (#slots * CPU_CYCLES))", "BriefDescription": "The truly effective ratio of micro-operations executed by the CPU, which means that misprediction and stall are not included", "MetricGroup": "PEutilization", "MetricName": "cpu_utilization", diff --git a/tools/perf/pmu-events/metric.py b/tools/perf/pmu-events/metric.py index 85a3545f5b6a..0e9ec65d92ae 100644 --- a/tools/perf/pmu-events/metric.py +++ b/tools/perf/pmu-events/metric.py @@ -413,6 +413,10 @@ def has_event(event: Event) -> Function: # pylint: disable=invalid-name return Function('has_event', event) +def strcmp_cpuid_str(event: str) -> Function: + # pylint: disable=redefined-builtin + # pylint: disable=invalid-name + return Function('strcmp_cpuid_str', event) class Metric: """An individual metric that will specifiable on the perf command line.""" @@ -541,14 +545,23 @@ def ParsePerfJson(orig: str) -> Expression: """ # pylint: disable=eval-used py = orig.strip() + # First try to convert everything that looks like a string (event name) into Event(r"EVENT_NAME"). + # This isn't very selective so is followed up by converting some unwanted conversions back again py = re.sub(r'([a-zA-Z][^-+/\* \\\(\),]*(?:\\.[^-+/\* \\\(\),]*)*)', r'Event(r"\1")', py) + # If it started with a # it should have been a literal, rather than an event name py = re.sub(r'#Event\(r"([^"]*)"\)', r'Literal("#\1")', py) + # Convert accidentally converted hex constants ("0Event(r"xDEADBEEF)"") back to a constant, + # but keep it wrapped in Event(), otherwise Python drops the 0x prefix and it gets interpreted as + # a double by the Bison parser + py = re.sub(r'0Event\(r"[xX]([0-9a-fA-F]*)"\)', r'Event("0x\1")', py) + # Convert accidentally converted scientific notation constants back py = re.sub(r'([0-9]+)Event\(r"(e[0-9]+)"\)', r'\1\2', py) - keywords = ['if', 'else', 'min', 'max', 'd_ratio', 'source_count', 'has_event'] + # Convert all the known keywords back from events to just the keyword + keywords = ['if', 'else', 'min', 'max', 'd_ratio', 'source_count', 'has_event', 'strcmp_cpuid_str', + 'cpuid_not_more_than'] for kw in keywords: py = re.sub(rf'Event\(r"{kw}"\)', kw, py) - try: parsed = ast.parse(py, mode='eval') except SyntaxError as e: diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c index 7410a165f68b..0985a3cbc6f9 100644 --- a/tools/perf/util/expr.c +++ b/tools/perf/util/expr.c @@ -13,6 +13,8 @@ #include #include #include "util/hashmap.h" +#include "util/header.h" +#include "util/pmu.h" #include "smt.h" #include "tsc.h" #include @@ -495,3 +497,19 @@ double expr__has_event(const struct expr_parse_ctx *ctx, bool compute_ids, const evlist__delete(tmp); return ret; } + +double expr__strcmp_cpuid_str(const struct expr_parse_ctx *ctx __maybe_unused, + bool compute_ids __maybe_unused, const char *test_id) +{ + double ret; + struct perf_pmu *pmu = pmu__find_core_pmu(); + char *cpuid = perf_pmu__getcpuid(pmu); + + if (!cpuid) + return NAN; + + ret = !strcmp_cpuid_str(test_id, cpuid); + + free(cpuid); + return ret; +} diff --git a/tools/perf/util/expr.h b/tools/perf/util/expr.h index 3c1e49b3e35d..c0cec29ddc29 100644 --- a/tools/perf/util/expr.h +++ b/tools/perf/util/expr.h @@ -55,5 +55,6 @@ double expr_id_data__value(const struct expr_id_data *data); double expr_id_data__source_count(const struct expr_id_data *data); double expr__get_literal(const char *literal, const struct expr_scanner_ctx *ctx); double expr__has_event(const struct expr_parse_ctx *ctx, bool compute_ids, const char *id); +double expr__strcmp_cpuid_str(const struct expr_parse_ctx *ctx, bool compute_ids, const char *id); #endif diff --git a/tools/perf/util/expr.l b/tools/perf/util/expr.l index dbb117414710..0feef0726c48 100644 --- a/tools/perf/util/expr.l +++ b/tools/perf/util/expr.l @@ -114,6 +114,7 @@ if { return IF; } else { return ELSE; } source_count { return SOURCE_COUNT; } has_event { return HAS_EVENT; } +strcmp_cpuid_str { return STRCMP_CPUID_STR; } {literal} { return literal(yyscanner, sctx); } {number} { return value(yyscanner); } {symbol} { return str(yyscanner, ID, sctx->runtime); } diff --git a/tools/perf/util/expr.y b/tools/perf/util/expr.y index 65d54a6f29ad..6c93b358cc2d 100644 --- a/tools/perf/util/expr.y +++ b/tools/perf/util/expr.y @@ -39,7 +39,7 @@ int expr_lex(YYSTYPE * yylval_param , void *yyscanner); } ids; } -%token ID NUMBER MIN MAX IF ELSE LITERAL D_RATIO SOURCE_COUNT HAS_EVENT EXPR_ERROR +%token ID NUMBER MIN MAX IF ELSE LITERAL D_RATIO SOURCE_COUNT HAS_EVENT STRCMP_CPUID_STR EXPR_ERROR %left MIN MAX IF %left '|' %left '^' @@ -207,6 +207,12 @@ expr: NUMBER $$.ids = NULL; free($3); } +| STRCMP_CPUID_STR '(' ID ')' +{ + $$.val = expr__strcmp_cpuid_str(ctx, compute_ids, $3); + $$.ids = NULL; + free($3); +} | expr '|' expr { if (is_const($1.val) && is_const($3.val)) { diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c index b6654b9f55d2..b6948021fe29 100644 --- a/tools/perf/util/pmu.c +++ b/tools/perf/util/pmu.c @@ -1779,3 +1779,20 @@ void perf_pmu__delete(struct perf_pmu *pmu) zfree(&pmu->alias_name); free(pmu); } + +struct perf_pmu *pmu__find_core_pmu(void) +{ + struct perf_pmu *pmu = NULL; + + while ((pmu = perf_pmus__scan_core(pmu))) { + /* + * The cpumap should cover all CPUs. Otherwise, some CPUs may + * not support some events or have different event IDs. + */ + if (RC_CHK_ACCESS(pmu->cpus)->nr != cpu__max_cpu().cpu) + return NULL; + + return pmu; + } + return NULL; +} diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h index 203b92860e3c..580b8d65bd65 100644 --- a/tools/perf/util/pmu.h +++ b/tools/perf/util/pmu.h @@ -288,5 +288,6 @@ int perf_pmu__pathname_fd(int dirfd, const char *pmu_name, const char *filename, struct perf_pmu *perf_pmu__lookup(struct list_head *pmus, int dirfd, const char *lookup_name); struct perf_pmu *perf_pmu__create_placeholder_core_pmu(struct list_head *core_pmus); void perf_pmu__delete(struct perf_pmu *pmu); +struct perf_pmu *pmu__find_core_pmu(void); #endif /* __PMU_H */