diff options
Diffstat (limited to 'lib/libpmc')
| -rw-r--r-- | lib/libpmc/Makefile | 2 | ||||
| -rw-r--r-- | lib/libpmc/libpmc.c | 30 | ||||
| -rw-r--r-- | lib/libpmc/pmc.3 | 24 | ||||
| -rw-r--r-- | lib/libpmc/pmc.h | 2 |
4 files changed, 57 insertions, 1 deletions
diff --git a/lib/libpmc/Makefile b/lib/libpmc/Makefile index 39f6198..7d24d85 100644 --- a/lib/libpmc/Makefile +++ b/lib/libpmc/Makefile @@ -12,6 +12,7 @@ MAN= pmc.3 MLINKS+= \ pmc.3 pmc_allocate.3 \ pmc.3 pmc_attach.3 \ + pmc.3 pmc_capabilities.3 \ pmc.3 pmc_configure_logfile.3 \ pmc.3 pmc_cpuinfo.3 \ pmc.3 pmc_detach.3 \ @@ -35,6 +36,7 @@ MLINKS+= \ pmc.3 pmc_set.3 \ pmc.3 pmc_start.3 \ pmc.3 pmc_stop.3 \ + pmc.3 pmc_width.3 \ pmc.3 pmc_write.3 \ pmc.3 pmc_x86_get_msr.3 diff --git a/lib/libpmc/libpmc.c b/lib/libpmc/libpmc.c index 526f071..272d25a 100644 --- a/lib/libpmc/libpmc.c +++ b/lib/libpmc/libpmc.c @@ -1981,6 +1981,36 @@ pmc_cpuinfo(const struct pmc_op_getcpuinfo **pci) return 0; } +int +pmc_width(pmc_id_t pmcid, uint32_t *width) +{ + unsigned int i; + enum pmc_class cl; + + cl = PMC_ID_TO_CLASS(pmcid); + for (i = 0; i < cpu_info.pm_nclass; i++) + if (cpu_info.pm_classes[i].pm_class == cl) { + *width = cpu_info.pm_classes[i].pm_width; + return 0; + } + return EINVAL; +} + +int +pmc_capabilities(pmc_id_t pmcid, uint32_t *caps) +{ + unsigned int i; + enum pmc_class cl; + + cl = PMC_ID_TO_CLASS(pmcid); + for (i = 0; i < cpu_info.pm_nclass; i++) + if (cpu_info.pm_classes[i].pm_class == cl) { + *caps = cpu_info.pm_classes[i].pm_caps; + return 0; + } + return EINVAL; +} + const char * pmc_name_of_cputype(enum pmc_cputype cp) { diff --git a/lib/libpmc/pmc.3 b/lib/libpmc/pmc.3 index aed6735..0612ce7 100644 --- a/lib/libpmc/pmc.3 +++ b/lib/libpmc/pmc.3 @@ -29,6 +29,7 @@ .Sh NAME .Nm pmc_allocate , .Nm pmc_attach , +.Nm pmc_capabilities , .Nm pmc_configure_logfile , .Nm pmc_cpuinfo , .Nm pmc_detach , @@ -53,6 +54,7 @@ .Nm pmc_start , .Nm pmc_stop , .Nm pmc_write , +.Nm pmc_width , .Nm pmc_x86_get_msr .Nd programming API for using hardware performance monitoring counters .Sh LIBRARY @@ -73,6 +75,8 @@ .Fa "pid_t pid" .Fc .Ft int +.Fn pmc_capabilities "pmc_id_t pmc" "uint32_t *caps" +.Ft int .Fn pmc_configure_logfile "int fd" .Ft int .Fn pmc_cpuinfo "const struct pmc_op_getcpuinfo **cpu_info" @@ -130,6 +134,8 @@ .Ft int .Fn pmc_write "pmc_id_t pmc" "pmc_value_t value" .Ft int +.Fn pmc_width "pmc_id_t pmc" "uint32_t *width" +.Ft int .Fn pmc_x86_get_msr "int pmc" "uint32_t *msr" .Sh DESCRIPTION These functions implement a high-level library for using the @@ -252,6 +258,20 @@ the allocated PMC. The read and write operation may be combined using .Fn pmc_rw . .Pp +The function +.Fn pmc_capabilities +sets argument +.Fa caps +to a bitmask of capabilities supported by the PMC denoted by +argument +.Fa pmc . +The function +.Fn pmc_width +sets argument +.Fa width +to the width of the PMC denoted by argument +.Fa pmc . +.Pp The .Fn pmc_configure_logfile function causes the @@ -3011,13 +3031,15 @@ library. .El .Pp A call to +.Fn pmc_capabilities , .Fn pmc_name_of_capability , .Fn pmc_name_of_disposition , .Fn pmc_name_of_state , .Fn pmc_name_of_event , .Fn pmc_name_of_mode -and .Fn pmc_name_of_class +and +.Fn pmc_width may fail with the following error: .Bl -tag -width Er .It Bq Er EINVAL diff --git a/lib/libpmc/pmc.h b/lib/libpmc/pmc.h index 98c4af2..7ee257b 100644 --- a/lib/libpmc/pmc.h +++ b/lib/libpmc/pmc.h @@ -38,6 +38,7 @@ int pmc_allocate(const char *_ctrspec, enum pmc_mode _mode, uint32_t _flags, int _cpu, pmc_id_t *_pmcid); int pmc_attach(pmc_id_t _pmcid, pid_t _pid); +int pmc_capabilities(pmc_id_t _pmc, uint32_t *_caps); int pmc_configure_logfile(int _fd); int pmc_detach(pmc_id_t _pmcid, pid_t _pid); int pmc_disable(int _cpu, int _pmc); @@ -50,6 +51,7 @@ int pmc_rw(pmc_id_t _pmc, pmc_value_t _newvalue, pmc_value_t *_oldvalue); int pmc_set(pmc_id_t _pmc, pmc_value_t _value); int pmc_start(pmc_id_t _pmc); int pmc_stop(pmc_id_t _pmc); +int pmc_width(pmc_id_t _pmc, uint32_t *_width); int pmc_write(pmc_id_t _pmc, pmc_value_t _value); int pmc_ncpu(void); |
