| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Thu, 3 Mar 2011 11:20:54 +0800
From: Lin Ming <minggr@...il.com>
To: Arun Sharma <asharma@...com>
Cc: acme@...radead.org, Ingo Molnar <mingo@...e.hu>,
Frederic Weisbecker <fweisbec@...il.com>,
Mike Galbraith <efault@....de>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Stephane Eranian <eranian@...gle.com>,
Thomas Gleixner <tglx@...utronix.de>,
Tom Zanussi <tzanussi@...il.com>,
lkml <linux-kernel@...r.kernel.org>,
perfmon2-devel@...ts.sourceforge.net, ming.m.lin@...el.com
Subject: Re: [PATCH] Add libpfm4 support (v2).
(add lkml and perfmon2-devel list)
On Sat, Feb 19, 2011 at 10:25 AM, Arun Sharma <asharma@...com> wrote:
> libpfm4 is a library that takes a CPU vendor documentation
> compatible string and fills out perf_event_attr. Typical
> use case: user wants to look at events other than the
> ones supported by perf using symbolic names.
>
> This version prints umasks as well and is compatible with the most recent
> version of libpfm4.
Interesting usage, I have a quick try with it.
See below for a small fix.
And the "perf list" output on my Westmere box.
Detected PMU: ix86arch -- Intel X86 architectural PMU Total events: 6
UNHALTED_CORE_CYCLES [Hardware event]
INSTRUCTION_RETIRED [Hardware event]
LLC_REFERENCES [Hardware event]
LLC_MISSES [Hardware event]
BRANCH_INSTRUCTIONS_RETIRED [Hardware event]
MISPREDICTED_BRANCH_RETIRED [Hardware event]
Detected PMU: wsm -- Intel Westmere (single-socket) Total events: 91
UNHALTED_CORE_CYCLES [Hardware event]
INSTRUCTION_RETIRED [Hardware event]
INSTRUCTIONS_RETIRED [Hardware event]
UNHALTED_REFERENCE_CYCLES [Hardware event]
LLC_REFERENCES [Hardware event]
LAST_LEVEL_CACHE_REFERENCES [Hardware event]
LLC_MISSES [Hardware event]
LAST_LEVEL_CACHE_MISSES [Hardware event]
BRANCH_INSTRUCTIONS_RETIRED [Hardware event]
......
Detected PMU: wsm_unc -- Intel Westmere uncore Total events: 52
UNC_CLK_UNHALTED [Hardware event]
UNC_DRAM_OPEN [Hardware event]
:CH0
:CH1
:CH2
UNC_GC_OCCUPANCY [Hardware event]
:READ_TRACKER
UNC_DRAM_PAGE_CLOSE [Hardware event]
:CH0
:CH1
:CH2
UNC_DRAM_PAGE_MISS [Hardware event]
:CH0
:CH1
:CH2
UNC_DRAM_PRE_ALL [Hardware event]
:CH0
:CH1
:CH2
UNC_DRAM_THERMAL_THROTTLED [Hardware event]
UNC_DRAM_READ_CAS [Hardware event]
....
>
> Signed-off-by: Arun Sharma <asharma@...com>
> Cc: Ingo Molnar <mingo@...e.hu>
> Cc: Frederic Weisbecker <fweisbec@...il.com>
> Cc: Mike Galbraith <efault@....de>
> Cc: Paul Mackerras <paulus@...ba.org>
> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> Cc: Stephane Eranian <eranian@...gle.com>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Tom Zanussi <tzanussi@...il.com>
> ---
> tools/perf/Makefile | 13 +++++
> tools/perf/feature-tests.mak | 11 ++++
> tools/perf/perf.c | 6 ++
> tools/perf/util/parse-events.c | 108 ++++++++++++++++++++++++++++++++++++++++
> tools/perf/util/parse-events.h | 3 +
> 5 files changed, 141 insertions(+), 0 deletions(-)
>
> diff --git a/tools/perf/Makefile b/tools/perf/Makefile
> index 9b84218..617db4a 100644
> --- a/tools/perf/Makefile
> +++ b/tools/perf/Makefile
> @@ -451,6 +451,19 @@ else
> endif
> endif
>
> +ifdef NO_LIBPFM4
> + BASIC_CFLAGS += -DNO_LIBPFM4_SUPPORT
> +else
> + FLAGS_LIBPFM4=$(ALL_CFLAGS) $(ALL_LDFLAGS) $(EXTLIBS) -lpfm
> + ifneq ($(call try-cc,$(SOURCE_LIBPFM4),$(FLAGS_LIBPFM4)),y)
> + msg := $(warning libpfm4 not found, events restricted to generic ones. Please install libpfm4-devel or libpfm4-dev);
> + BASIC_CFLAGS += -DNO_LIBPFM4_SUPPORT
> + else
> + BASIC_CFLAGS += -DLIBPFM4
> + EXTLIBS += -lpfm
> + endif
> +endif
> +
> ifdef NO_LIBPERL
> BASIC_CFLAGS += -DNO_LIBPERL
> else
> diff --git a/tools/perf/feature-tests.mak b/tools/perf/feature-tests.mak
> index b041ca6..ec6b27b 100644
> --- a/tools/perf/feature-tests.mak
> +++ b/tools/perf/feature-tests.mak
> @@ -121,6 +121,17 @@ int main(void)
> }
> endef
>
> +ifndef NO_LIBPFM4
> +define SOURCE_LIBPFM4
> +#include <perfmon/pfmlib_perf_event.h>
> +
> +int main(void)
> +{
> + return pfm_initialize();
> +}
> +endef
> +endif
> +
> # try-cc
> # Usage: option = $(call try-cc, source-to-build, cc-options)
> try-cc = $(shell sh -c \
> diff --git a/tools/perf/perf.c b/tools/perf/perf.c
> index 595d0f4..a847afb 100644
> --- a/tools/perf/perf.c
> +++ b/tools/perf/perf.c
> @@ -472,6 +472,12 @@ int main(int argc, const char **argv)
> }
> cmd = argv[0];
>
> +#ifdef LIBPFM4
> + if (pfm_initialize() != PFM_SUCCESS) {
> + fprintf(stderr, "pfm_initialize failed\n");
> + return 1;
> + }
> +#endif
> /*
> * We use PATH to find perf commands, but we prepend some higher
> * precedence paths: the "--exec-path" option, the PERF_EXEC_PATH
> diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
> index 54a7e26..a7e5765 100644
> --- a/tools/perf/util/parse-events.c
> +++ b/tools/perf/util/parse-events.c
> @@ -696,6 +696,47 @@ parse_numeric_event(const char **strp, struct perf_event_attr *attr)
> return EVT_FAILED;
> }
>
> +#ifdef LIBPFM4
> +static enum event_result
> +parse_libpfm4_event(const char **strp, struct perf_event_attr *attr)
> +{
> + int ret;
> + const char *str = *strp;
> + const char *comma_loc = NULL;
> + char *evt_name = NULL;
> + size_t len = 0;
> +
> + comma_loc = strchr(str, ',');
> + if (comma_loc) {
> + /* take the event name up to the comma */
> + len = comma_loc - str;
> + evt_name = strndup(str, len+1);
> + if (evt_name == NULL) {
> + pr_err("strndup returned NULL. Out of memory?");
> + return EVT_FAILED;
> + }
> + evt_name[len] = '\0';
> + } else {
> + evt_name = (char *) *strp;
> + }
> +
> + ret = pfm_get_perf_event_encoding(evt_name, PFM_PLM0|PFM_PLM3, attr,
> + NULL, NULL);
> + if (ret != PFM_SUCCESS) {
> + return EVT_FAILED;
> + }
> +
> + if (comma_loc) {
> + *strp += len;
> + free(evt_name);
> + } else {
> + *strp += strlen(evt_name);
> + }
> +
> + return EVT_HANDLED;
> +}
> +#endif
> +
> static enum event_result
> parse_event_modifier(const char **strp, struct perf_event_attr *attr)
> {
> @@ -762,6 +803,17 @@ parse_event_symbols(const struct option *opt, const char **str,
> if (ret != EVT_FAILED)
> goto modifier;
>
> +#ifdef LIBPFM4
> + /*
> + * Handle libpfm4 before generic_hw events.
> + * Some events (eg: LLC_MISSES) fail otherwise.
> + */
> + ret = parse_libpfm4_event(str, attr);
> + if (ret != EVT_FAILED)
> + /* libpfm4 has its own modifier parsing code */
> + goto modifier;
> +#endif
> +
> ret = parse_generic_hw_event(str, attr);
> if (ret != EVT_FAILED)
> goto modifier;
> @@ -987,6 +1039,22 @@ int print_hwcache_events(const char *event_glob)
> return printed;
> }
>
> +#ifdef LIBPFM4
> +static void print_umasks(pfm_event_info_t *info)
> +{
> + int i, ret;
> + pfm_event_attr_info_t ainfo;
> +
> + pfm_for_each_event_attr(i, info) {
> + ret = pfm_get_event_attr_info(info->idx, i,
> + PFM_OS_PERF_EVENT_EXT, &ainfo);
> + if ((ret != PFM_SUCCESS) || (ainfo.type != PFM_ATTR_UMASK))
> + continue;
> + printf(" \t:%-42s\n", ainfo.name);
> + }
> +}
> +#endif
> +
> /*
> * Print the help text for the event symbols:
> */
> @@ -1033,6 +1101,46 @@ void print_events(const char *event_glob)
> if (event_glob != NULL)
> return;
>
> +#ifdef LIBPFM4
> + printf("\n");
> + pfm_for_all_pmus(i) {
> + int ret;
> + pfm_pmu_info_t pinfo;
> + int count;
> + int k;
> +
Need to initialize pinfo before passing it to pfm_get_pmu_info
+ memset(&pinfo, 0, sizeof(pinfo));
> + ret = pfm_get_pmu_info(i, &pinfo);
> + if (ret != PFM_SUCCESS)
> + continue;
> + if (!pinfo.is_present)
> + continue;
> + if (pinfo.pmu == PFM_PMU_PERF_EVENT)
> + continue;
> +
> + printf("\nDetected PMU: %s -- %s Total events: %d\n",
> + pinfo.name,
> + pinfo.desc,
> + pinfo.nevents);
> +
> + count = 0;
> + for (k = pinfo.first_event; k != -1; k = pfm_get_event_next(k)) {
> + pfm_event_info_t info;
> +
> + ret = pfm_get_event_info(k, PFM_OS_PERF_EVENT_EXT, &info);
> + if (info.pmu != pinfo.pmu)
> + continue;
> +
> + count++;
> + if (count > pinfo.nevents)
> + break;
> + printf(" %-42s [%s]\n",
> + info.name,
> + event_type_descriptors[PERF_TYPE_HARDWARE]);
> + print_umasks(&info);
> + }
> + }
> +#endif
> +
> printf("\n");
> printf(" %-42s [%s]\n",
> "rNNN (see 'perf list --help' on how to encode it)",
> diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
> index 212f88e..89c153c 100644
> --- a/tools/perf/util/parse-events.h
> +++ b/tools/perf/util/parse-events.h
> @@ -5,6 +5,9 @@
> */
>
> #include "../../../include/linux/perf_event.h"
> +#ifdef LIBPFM4
> +#include <perfmon/pfmlib_perf_event.h>
> +#endif
>
> struct list_head;
> struct perf_evsel;
> --
> 1.7.4
>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists