From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759292Ab1LORYL (ORCPT ); Thu, 15 Dec 2011 12:24:11 -0500 Received: from ch1ehsobe002.messaging.microsoft.com ([216.32.181.182]:42394 "EHLO ch1outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759238Ab1LORYH convert rfc822-to-8bit (ORCPT ); Thu, 15 Dec 2011 12:24:07 -0500 X-SpamScore: 0 X-BigFish: VPS0(zzc89bhzz1202hzz8275bhz2dh668h839h93fh) X-Forefront-Antispam-Report: CIP:163.181.249.109;KIP:(null);UIP:(null);IPV:NLI;H:ausb3twp02.amd.com;RD:none;EFVD:NLI X-WSS-ID: 0LW99NY-02-0QU-02 X-M-MSG: From: Robert Richter To: Arnaldo Carvalho de Melo CC: Peter Zijlstra , Ingo Molnar , Stephane Eranian , LKML , Lin Ming Subject: [PATCH 1/4] perf tool: Parse general/raw events from sysfs Date: Thu, 15 Dec 2011 18:23:41 +0100 Message-ID: <1323969824-9711-2-git-send-email-robert.richter@amd.com> X-Mailer: git-send-email 1.7.7 In-Reply-To: <1323969824-9711-1-git-send-email-robert.richter@amd.com> References: <1323969824-9711-1-git-send-email-robert.richter@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT X-OriginatorOrg: amd.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lin Ming PMU can export general events to sysfs, for example, /sys/bus/event_source/devices/uncore/events └── cycle Then specify the event as :, $ sudo perf stat -a -C 0 -e uncore:cycle ^C Performance counter stats for 'CPU 0': 56,547,314 uncore:cycle Raw event can be specified as :rXXXX $ sudo perf stat -a -C 0 -e uncore:r0101 ^C Performance counter stats for 'CPU 0': 8,504 uncore:r0101 Signed-off-by: Lin Ming --- tools/perf/util/parse-events.c | 84 +++++++++++++++++++++++++++++++++++++++- 1 files changed, 82 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 586ab3f..4ce9404 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -685,7 +685,7 @@ parse_symbolic_event(const char **strp, struct perf_event_attr *attr) } static enum event_result -parse_raw_event(const char **strp, struct perf_event_attr *attr) +parse_raw_config(const char **strp, struct perf_event_attr *attr) { const char *str = *strp; u64 config; @@ -700,7 +700,6 @@ parse_raw_event(const char **strp, struct perf_event_attr *attr) return EVT_FAILED; *strp = end; - attr->type = PERF_TYPE_RAW; attr->config = config; return EVT_HANDLED; } @@ -708,6 +707,83 @@ parse_raw_event(const char **strp, struct perf_event_attr *attr) } static enum event_result +parse_raw_event(const char **strp, struct perf_event_attr *attr) +{ + if (parse_raw_config(strp, attr) != EVT_HANDLED) + return EVT_FAILED; + + attr->type = PERF_TYPE_RAW; + return EVT_HANDLED; +} + +#define EVENT_SOURCE_DIR "/sys/bus/event_source/devices" + +static u64 read_sysfs_entry(const char *path) +{ + char buf[19]; + int fd; + + fd = open(path, O_RDONLY); + if (fd < 0) + return -1; + + if (read(fd, buf, sizeof(buf)) < 0) { + close(fd); + return -1; + } + + close(fd); + return atoll(buf); +} + +static u64 get_pmu_type(const char *pmu_name) +{ + char evt_path[MAXPATHLEN]; + + snprintf(evt_path, MAXPATHLEN, "%s/%s/type", EVENT_SOURCE_DIR, + pmu_name); + + return read_sysfs_entry(evt_path); +} + +static u64 get_pmu_event_config(const char *pmu_name, const char *evt_name) +{ + char evt_path[MAXPATHLEN]; + + snprintf(evt_path, MAXPATHLEN, "%s/%s/events/%s", EVENT_SOURCE_DIR, + pmu_name, evt_name); + + return read_sysfs_entry(evt_path); +} + +static enum event_result +parse_sysfs_event(const char **strp, struct perf_event_attr *attr) +{ + char *pmu_name, *evt_name; + u64 type, config; + + pmu_name = strchr(*strp, ':'); + if (!pmu_name) + return EVT_FAILED; + pmu_name = strndup(*strp, pmu_name - *strp); + type = get_pmu_type(pmu_name); + if ((int)type < 0) + return EVT_FAILED; + attr->type = type; + + evt_name = strchr(*strp, ':') + 1; + config = get_pmu_event_config(pmu_name, evt_name); + *strp += strlen(pmu_name) + 1; /* + 1 for the ':' */ + + if ((int)config < 0) + return parse_raw_config(strp, attr); + + attr->config = config; + *strp += strlen(evt_name); + return EVT_HANDLED; +} + +static enum event_result parse_numeric_event(const char **strp, struct perf_event_attr *attr) { const char *str = *strp; @@ -788,6 +864,10 @@ parse_event_symbols(struct perf_evlist *evlist, const char **str, { enum event_result ret; + ret = parse_sysfs_event(str, attr); + if (ret != EVT_FAILED) + goto modifier; + ret = parse_tracepoint_event(evlist, str, attr); if (ret != EVT_FAILED) goto modifier; -- 1.7.7