NetBSD/lib/libpmc/pmc.c

239 lines
5.3 KiB
C
Raw Normal View History

/* $NetBSD: pmc.c,v 1.1 2002/08/09 00:03:15 thorpej Exp $ */
/*
* Copyright (c 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <errno.h>
#include <pmc.h>
#include "pmc_private.h"
static const struct pmc_class2evid *
_pmc_type_lookup(int classval)
{
const struct pmc_class2evid *class;
for (class = _pmc_md_classes; class->name != NULL; class++) {
if (class->class == classval)
return (class);
}
return (NULL);
}
static const struct pmc_event *
_pmc_evid_lookup(const char *evname)
{
const struct pmc_class2evid *class;
const struct pmc_event *evid;
int classval;
if (pmc_get_info(-1, PMC_INFO_CPUCTR_TYPE, &classval) == -1) {
/* Sets errno for us. */
return (NULL);
}
if ((class = _pmc_type_lookup(classval)) == NULL) {
errno = ESRCH;
return (NULL);
}
for (evid = class->evids; evid->name != NULL; evid++) {
if (evname[0] == evid->name[0] &&
strcmp(evname, evid->name) == 0)
break;
}
if (evid->name == NULL) {
errno = ESRCH;
return (NULL);
}
return (evid);
}
int
pmc_configure_counter(int ctr, const char *evname, pmc_ctr_t reset_val,
uint32_t flags)
{
struct pmc_counter_cfg pcfg;
const struct pmc_event *evid;
evid = _pmc_evid_lookup(evname);
if (evid == NULL) {
/* _pmc_evid_lookup() set errno */
return (-1);
}
pcfg.event_id = evid->val;
pcfg.reset_value = reset_val;
pcfg.flags = flags;
return (pmc_control(ctr, PMC_OP_CONFIGURE, &pcfg));
}
int
pmc_start_counter(int ctr)
{
return (pmc_control(ctr, PMC_OP_START, NULL));
}
int
pmc_stop_counter(int ctr)
{
return (pmc_control(ctr, PMC_OP_STOP, NULL));
}
int
pmc_get_num_counters(void)
{
int rv;
if (pmc_get_info(-1, PMC_INFO_NCOUNTERS, &rv) == -1)
return (0);
return (rv);
}
int
pmc_get_counter_class(void)
{
int rv;
if (pmc_get_info(-1, PMC_INFO_CPUCTR_TYPE, &rv) == -1)
return (0);
return (rv);
}
int
pmc_get_counter_type(int ctr, int *typep)
{
/* If they want class, they should call pmc_get_counter_class(). */
if (ctr < 0) {
errno = ENODEV;
return (-1);
}
return (pmc_get_info(ctr, PMC_INFO_CPUCTR_TYPE, typep));
}
int
pmc_get_counter_value(int ctr, uint64_t *valp)
{
return (pmc_get_info(ctr, PMC_INFO_COUNTER_VALUE, valp));
}
int
pmc_get_accumulated_counter_value(int ctr, uint64_t *valp)
{
return (pmc_get_info(ctr, PMC_INFO_ACCUMULATED_COUNTER_VALUE, valp));
}
const char *
pmc_get_counter_class_name(int classval)
{
const struct pmc_class2evid *class;
class = _pmc_type_lookup(classval);
if (class == NULL) {
errno = ESRCH;
return (NULL);
}
return (class->name);
}
const char *
pmc_get_counter_type_name(int type)
{
const struct pmc_class2evid *class;
class = _pmc_type_lookup(type);
if (class == NULL) {
errno = ESRCH;
return (NULL);
}
return (class->name);
}
const char *
pmc_get_counter_event_name(pmc_evid_t event)
{
const struct pmc_class2evid *class;
const struct pmc_event *evid;
int classval;
if (pmc_get_info(-1, PMC_INFO_CPUCTR_TYPE, &classval) == -1) {
/* Sets errno for us. */
return (NULL);
}
if ((class = _pmc_type_lookup(classval)) == NULL) {
errno = ESRCH;
return (NULL);
}
for (evid = class->evids; evid->name != NULL; evid++) {
if (evid->val == event)
break;
}
if (evid->name == NULL) {
errno = ESRCH;
return (NULL);
}
return (evid->name);
}
const struct pmc_event *
pmc_get_counter_event_list(void)
{
const struct pmc_class2evid *class;
int classval;
if (pmc_get_info(-1, PMC_INFO_CPUCTR_TYPE, &classval) == -1) {
/* Sets errno for us. */
return (NULL);
}
if ((class = _pmc_type_lookup(classval)) == NULL) {
errno = ESRCH;
return (NULL);
}
return (class->evids);
}