dceed24a7c
As the underlying block is 4KB if the PMC throughput is low the measurement will be reported on the next tick. pmcstat(8) use the modified flush API to reclaim current buffer before displaying next top. MFC after: 1 month
114 lines
3.9 KiB
C
114 lines
3.9 KiB
C
/*-
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* Copyright (c) 2003,2004 Joseph Koshy
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _PMC_H_
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#define _PMC_H_
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#include <sys/cdefs.h>
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#include <sys/pmc.h>
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/*
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* Driver statistics.
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*/
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struct pmc_driverstats {
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int pm_intr_ignored; /* #interrupts ignored */
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int pm_intr_processed; /* #interrupts processed */
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int pm_intr_bufferfull; /* #interrupts with ENOSPC */
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int pm_syscalls; /* #syscalls */
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int pm_syscall_errors; /* #syscalls with errors */
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int pm_buffer_requests; /* #buffer requests */
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int pm_buffer_requests_failed; /* #failed buffer requests */
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int pm_log_sweeps; /* #sample buffer processing passes */
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};
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/*
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* CPU information.
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*/
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struct pmc_cpuinfo {
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enum pmc_cputype pm_cputype; /* the kind of CPU */
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uint32_t pm_ncpu; /* number of CPUs */
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uint32_t pm_npmc; /* #PMCs per CPU */
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uint32_t pm_nclass; /* #classes of PMCs */
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struct pmc_classinfo pm_classes[PMC_CLASS_MAX];
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};
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/*
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* Current PMC state.
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*/
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struct pmc_pmcinfo {
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int32_t pm_cpu; /* CPU number */
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struct pmc_info pm_pmcs[]; /* NPMC structs */
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};
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/*
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* Prototypes
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*/
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__BEGIN_DECLS
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int pmc_allocate(const char *_ctrspec, enum pmc_mode _mode, uint32_t _flags,
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int _cpu, pmc_id_t *_pmcid);
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int pmc_attach(pmc_id_t _pmcid, pid_t _pid);
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int pmc_capabilities(pmc_id_t _pmc, uint32_t *_caps);
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int pmc_configure_logfile(int _fd);
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int pmc_flush_logfile(void);
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int pmc_close_logfile(void);
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int pmc_detach(pmc_id_t _pmcid, pid_t _pid);
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int pmc_disable(int _cpu, int _pmc);
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int pmc_enable(int _cpu, int _pmc);
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int pmc_get_driver_stats(struct pmc_driverstats *_gms);
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int pmc_get_msr(pmc_id_t _pmc, uint32_t *_msr);
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int pmc_init(void);
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int pmc_read(pmc_id_t _pmc, pmc_value_t *_value);
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int pmc_release(pmc_id_t _pmc);
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int pmc_rw(pmc_id_t _pmc, pmc_value_t _newvalue, pmc_value_t *_oldvalue);
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int pmc_set(pmc_id_t _pmc, pmc_value_t _value);
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int pmc_start(pmc_id_t _pmc);
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int pmc_stop(pmc_id_t _pmc);
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int pmc_width(pmc_id_t _pmc, uint32_t *_width);
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int pmc_write(pmc_id_t _pmc, pmc_value_t _value);
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int pmc_writelog(uint32_t _udata);
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int pmc_ncpu(void);
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int pmc_npmc(int _cpu);
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int pmc_cpuinfo(const struct pmc_cpuinfo **_cpu_info);
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int pmc_pmcinfo(int _cpu, struct pmc_pmcinfo **_pmc_info);
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const char *pmc_name_of_capability(uint32_t _c);
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const char *pmc_name_of_class(enum pmc_class _pc);
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const char *pmc_name_of_cputype(enum pmc_cputype _cp);
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const char *pmc_name_of_disposition(enum pmc_disp _pd);
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const char *pmc_name_of_event(enum pmc_event _pe);
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const char *pmc_name_of_mode(enum pmc_mode _pm);
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const char *pmc_name_of_state(enum pmc_state _ps);
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int pmc_event_names_of_class(enum pmc_class _cl, const char ***_eventnames,
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int *_nevents);
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__END_DECLS
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#endif
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