OpenSolaris_b135/cmd/powertop/common/events.c
/*
* Copyright 2009, Intel Corporation
* Copyright 2009, Sun Microsystems, Inc
*
* This file is part of PowerTOP
*
* This program file is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program in a file named COPYING; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* Authors:
* Arjan van de Ven <arjan@linux.intel.com>
* Eric C Saxe <eric.saxe@sun.com>
* Aubrey Li <aubrey.li@intel.com>
*/
/*
* GPL Disclaimer
*
* For the avoidance of doubt, except that if any license choice other
* than GPL or LGPL is available it will apply instead, Sun elects to
* use only the General Public License version 2 (GPLv2) at this time
* for any software where a choice of GPL license versions is made
* available with the language indicating that GPLv2 or any later
* version may be used, or where a choice of which version of the GPL
* is applied is otherwise unspecified.
*/
#include <string.h>
#include <stdlib.h>
#include <dtrace.h>
#include "powertop.h"
static dtrace_hdl_t *dtp;
static event_info_t *event;
/*ARGSUSED*/
static int
pt_events_walk(const dtrace_aggdata_t *data, void *arg)
{
dtrace_aggdesc_t *aggdesc = data->dtada_desc;
dtrace_recdesc_t *rec1, *rec2, *rec3;
dtrace_syminfo_t dts;
GElf_Sym sym;
uint64_t offender_addr;
uint64_t n = 0;
int32_t *instance, *offender_cpu;
int i;
char *offense_name;
if (g_top_events >= EVENT_NUM_MAX)
return (0);
rec1 = &aggdesc->dtagd_rec[1];
rec2 = &aggdesc->dtagd_rec[2];
/*
* Report interrupts
*/
if (strcmp(aggdesc->dtagd_name, "interrupts") == 0) {
offense_name = data->dtada_data + rec1->dtrd_offset;
/* LINTED - alignment */
instance = (int32_t *)(data->dtada_data + rec2->dtrd_offset);
(void) snprintf((char *)(event->offender_name),
EVENT_NAME_MAX, "%s", "<interrupt>");
(void) snprintf((char *)(event->offense_name),
EVENT_NAME_MAX, "%s#%d", offense_name, *instance);
/*
* Report kernel events
*/
} else if (strcmp(aggdesc->dtagd_name, "events_k") == 0) {
(void) snprintf((char *)(event->offender_name),
EVENT_NAME_MAX, "%s", "<kernel>");
/*
* Casting offender_addr to the wrong type will cause
* dtrace_lookup_by_addr to return 0 and the report
* to show an address instead of a name.
*/
switch (g_bit_depth) {
case 32:
/* LINTED - alignment */
offender_addr = *(uint32_t *)(data->dtada_data +
rec1->dtrd_offset);
break;
case 64:
/* LINTED - alignment */
offender_addr = *(uint64_t *)(data->dtada_data +
rec1->dtrd_offset);
break;
}
/*
* We have the address of the kernel callout.
* Try to resolve it into a meaningful symbol
*/
if (offender_addr != NULL && dtrace_lookup_by_addr(dtp,
offender_addr, &sym, &dts) == 0) {
(void) snprintf((char *)(event->offense_name),
EVENT_NAME_MAX, "%s`%s", dts.dts_object,
dts.dts_name);
} else {
(void) snprintf((char *)(event->offense_name),
EVENT_NAME_MAX, "0x%llx", offender_addr);
}
/*
* Report user events
*/
} else if (strcmp(aggdesc->dtagd_name, "events_u") == 0) {
offense_name = data->dtada_data + rec1->dtrd_offset;
(void) snprintf((char *)(event->offender_name),
EVENT_NAME_MAX, "%s", offense_name);
(void) snprintf((char *)(event->offense_name),
EVENT_NAME_MAX, "<scheduled timeout expiration>");
/*
* Report cross calls
*/
} else if (strcmp(aggdesc->dtagd_name, "events_x") == 0) {
offense_name = data->dtada_data + rec1->dtrd_offset;
(void) snprintf((char *)(event->offender_name),
EVENT_NAME_MAX, "%s", offense_name);
switch (g_bit_depth) {
case 32:
/* LINTED - alignment */
offender_addr = *(uint32_t *)(data->dtada_data +
rec2->dtrd_offset);
break;
case 64:
/* LINTED - alignment */
offender_addr = *(uint64_t *)(data->dtada_data +
rec2->dtrd_offset);
break;
}
/*
* Try to resolve the address of the cross call function.
*/
if (offender_addr != NULL && dtrace_lookup_by_addr(dtp,
offender_addr, &sym, &dts) == 0) {
(void) snprintf((char *)(event->offense_name),
EVENT_NAME_MAX, "<xcalls> %s`%s",
dts.dts_object, dts.dts_name);
} else {
(void) snprintf((char *)(event->offense_name),
EVENT_NAME_MAX, "<xcalls>");
}
/*
* Report cross calls from other CPUs than the one we're observing
* with the -C option
*/
} else if (strcmp(aggdesc->dtagd_name, "events_xc") == 0) {
rec3 = &aggdesc->dtagd_rec[3];
offense_name = data->dtada_data + rec1->dtrd_offset;
(void) snprintf((char *)(event->offender_name),
EVENT_NAME_MAX, "%s", offense_name);
switch (g_bit_depth) {
case 32:
/* LINTED - alignment */
offender_addr = *(uint32_t *)(data->dtada_data +
rec2->dtrd_offset);
break;
case 64:
/* LINTED - alignment */
offender_addr = *(uint64_t *)(data->dtada_data +
rec2->dtrd_offset);
break;
}
/* LINTED - alignment */
offender_cpu = (int32_t *)(data->dtada_data +
rec3->dtrd_offset);
/*
* Try to resolve the address of the cross call function.
*/
if (offender_addr != NULL && dtrace_lookup_by_addr(dtp,
offender_addr, &sym, &dts) == 0) {
(void) snprintf((char *)(event->offense_name),
EVENT_NAME_MAX, "<xcalls> %s`%s (CPU %d)",
dts.dts_object, dts.dts_name, *offender_cpu);
} else {
(void) snprintf((char *)(event->offense_name),
EVENT_NAME_MAX, "<xcalls> (CPU %d)",
*offender_cpu);
}
/*
* Report unknown events
*/
} else {
(void) snprintf((char *)(event->offender_name),
EVENT_NAME_MAX, "%s", "<unknown>");
(void) snprintf((char *)(event->offense_name),
EVENT_NAME_MAX, "%s", "<unknown>");
}
for (i = 0; i < g_ncpus; i++) {
/* LINTED - alignment */
n += *((uint64_t *)(data->dtada_percpu[i]));
}
event->total_count = n;
event++;
g_top_events++;
return (DTRACE_AGGWALK_NEXT);
}
int
pt_events_stat_prepare(void)
{
dtrace_prog_t *prog;
dtrace_proginfo_t info;
dtrace_optval_t statustime;
int err;
char *prog_ptr;
event = g_event_info;
if ((dtp = dtrace_open(DTRACE_VERSION, 0, &err)) == NULL) {
pt_error("cannot open dtrace library for the event report: "
"%s\n", dtrace_errmsg(NULL, err));
return (-1);
}
/*
* Execute different scripts (defined in the platform specific file)
* depending on user specified options.
*/
if (PT_ON_VERBOSE) {
prog_ptr = (char *)g_dtp_events_v;
} else {
if (PT_ON_CPU)
prog_ptr = (char *)g_dtp_events_c;
else
prog_ptr = (char *)g_dtp_events;
}
if ((prog = dtrace_program_strcompile(dtp, prog_ptr,
DTRACE_PROBESPEC_NAME, 0, g_argc, g_argv)) == NULL) {
pt_error("failed to compile the event report program\n");
return (dtrace_errno(dtp));
}
if (dtrace_program_exec(dtp, prog, &info) == -1) {
pt_error("failed to enable probes for the event report\n");
return (dtrace_errno(dtp));
}
if (dtrace_setopt(dtp, "aggsize", "128k") == -1) {
pt_error("failed to set 'aggsize' for the event report\n");
return (dtrace_errno(dtp));
}
if (dtrace_setopt(dtp, "aggrate", "0") == -1) {
pt_error("failed to set 'aggrate' for the event report\n");
return (dtrace_errno(dtp));
}
if (dtrace_setopt(dtp, "aggpercpu", 0) == -1) {
pt_error("failed to set 'aggpercpu' for the event report\n");
return (dtrace_errno(dtp));
}
if (dtrace_go(dtp) != 0) {
pt_error("failed to start the event report observation\n");
return (dtrace_errno(dtp));
}
if (dtrace_getopt(dtp, "statusrate", &statustime) == -1) {
pt_error("failed to get 'statusrate' for the event report\n");
return (dtrace_errno(dtp));
}
return (0);
}
int
pt_events_stat_collect(void)
{
g_top_events = 0;
event = g_event_info;
if (dtrace_status(dtp) == -1)
return (-1);
if (dtrace_aggregate_snap(dtp) != 0)
pt_error("failed to collect data for the event report\n");
if (dtrace_aggregate_walk_keyvarsorted(dtp, pt_events_walk, NULL) != 0)
pt_error("failed to sort data for the event report\n");
dtrace_aggregate_clear(dtp);
return (0);
}