char netcpu_pstat_id[]="\
@(#)netcpu_pstat.c (c) Copyright 2005-2012, Hewlett-Packard Company, Version 2.6.0";
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#if HAVE_INTTYPES_H
# include <inttypes.h>
#else
# if HAVE_STDINT_H
# include <stdint.h>
# endif
#endif
#if HAVE_LIMITS_H
# include <limits.h>
#endif
#include <sys/dk.h>
#include <sys/pstat.h>
#ifndef PSTAT_IPCINFO
# error Sorry, pstat() CPU utilization on 10.0 and later only
#endif
#include "netsh.h"
#include "netlib.h"
/* the lib_start_count and lib_end_count arrays hold the starting
and ending values of whatever is counting when the system is
idle. The rate at which this increments during a test is compared
with a previous calibrarion to arrive at a CPU utilization
percentage. raj 2005-01-26 */
static uint64_t lib_start_count[MAXCPUS];
static uint64_t lib_end_count[MAXCPUS];
void
cpu_util_init(void)
{
return;
}
void
cpu_util_terminate(void)
{
return;
}
int
get_cpu_method(void)
{
return HP_IDLE_COUNTER;
}
static void
get_cpu_idle(uint64_t *res)
{
/* get the idle sycle counter for each processor */
struct pst_processor *psp;
union overlay_u {
long long full;
long word[2];
} *overlay;
psp = (struct pst_processor *)malloc(lib_num_loc_cpus * sizeof(*psp));
if (psp == NULL) {
printf("malloc(%d) failed!\n", lib_num_loc_cpus * sizeof(*psp));
exit(1);
}
if (pstat_getprocessor(psp, sizeof(*psp), lib_num_loc_cpus, 0) != -1) {
int i;
for (i = 0; i < lib_num_loc_cpus; i++) {
overlay = (union overlay_u *)&(res[i]);
overlay->word[0] = psp[i].psp_idlecycles.psc_hi;
overlay->word[1] = psp[i].psp_idlecycles.psc_lo;
if(debug) {
fprintf(where,
"\tres[%d] = 0x%8.8x%8.8x\n",
i,
hi_32(&res[i]),
lo_32(&res[i]));
fflush(where);
}
}
free(psp);
}
}
/* calibrate_pstat
Loop a number of iterations, sleeping wait_time seconds each and
count how high the idle counter gets each time. Return the measured
cpu rate to the calling routine. */
float
calibrate_idle_rate(int iterations, int interval)
{
uint64_t
firstcnt[MAXCPUS],
secondcnt[MAXCPUS];
float
elapsed,
temp_rate,
rate[MAXTIMES],
local_maxrate;
long
sec,
usec;
int
i,
j;
long count;
struct timeval time1, time2;
struct timezone tz;
struct pst_processor *psp;
if (iterations > MAXTIMES) {
iterations = MAXTIMES;
}
local_maxrate = -1.0;
psp = (struct pst_processor *)malloc(lib_num_loc_cpus * sizeof(*psp));
if (psp == NULL) {
printf("malloc(%d) failed!\n", lib_num_loc_cpus * sizeof(*psp));
exit(1);
}
for(i = 0; i < iterations; i++) {
rate[i] = 0.0;
/* get the idle sycle counter for each processor */
if (pstat_getprocessor(psp, sizeof(*psp), lib_num_loc_cpus, 0) != -1) {
for (j = 0; j < lib_num_loc_cpus; j++) {
union overlay_u {
long long full;
long word[2];
} *overlay;
overlay = (union overlay_u *)&(firstcnt[j]);
overlay->word[0] = psp[j].psp_idlecycles.psc_hi;
overlay->word[1] = psp[j].psp_idlecycles.psc_lo;
}
}
else {
fprintf(where,"pstat_getprocessor failure errno %d\n",errno);
fflush(where);
exit(1);
}
gettimeofday (&time1, &tz);
sleep(interval);
gettimeofday (&time2, &tz);
if (time2.tv_usec < time1.tv_usec)
{
time2.tv_usec += 1000000;
time2.tv_sec -=1;
}
sec = time2.tv_sec - time1.tv_sec;
usec = time2.tv_usec - time1.tv_usec;
elapsed = (float)sec + ((float)usec/(float)1000000.0);
if(debug) {
fprintf(where, "Calibration for counter run: %d\n",i);
fprintf(where,"\tsec = %ld usec = %ld\n",sec,usec);
fprintf(where,"\telapsed time = %g\n",elapsed);
}
if (pstat_getprocessor(psp, sizeof(*psp), lib_num_loc_cpus, 0) != -1) {
for (j = 0; j < lib_num_loc_cpus; j++) {
union overlay_u {
long long full;
long word[2];
} *overlay;
overlay = (union overlay_u *)&(secondcnt[j]);
overlay->word[0] = psp[j].psp_idlecycles.psc_hi;
overlay->word[1] = psp[j].psp_idlecycles.psc_lo;
if(debug) {
/* I know that there are situations where compilers know about */
/* long long, but the library fucntions do not... raj 4/95 */
fprintf(where,
"\tfirstcnt[%d] = 0x%8.8x%8.8x secondcnt[%d] = 0x%8.8x%8.8x\n",
j,
hi_32(&firstcnt[j]),
lo_32(&firstcnt[j]),
j,
hi_32(&secondcnt[j]),
lo_32(&secondcnt[j]));
}
temp_rate = (secondcnt[j] >= firstcnt[j]) ?
(float)(secondcnt[j] - firstcnt[j] )/elapsed :
(float)(secondcnt[j] - firstcnt[j] + LONG_LONG_MAX)/elapsed;
if (temp_rate > rate[i]) rate[i] = temp_rate;
if(debug) {
fprintf(where,"\trate[%d] = %g\n",i,rate[i]);
fflush(where);
}
if (local_maxrate < rate[i]) local_maxrate = rate[i];
}
}
else {
fprintf(where,"pstat failure; errno %d\n",errno);
fflush(where);
exit(1);
}
}
if(debug) {
fprintf(where,"\tlocal maxrate = %g per sec. \n",local_maxrate);
fflush(where);
}
return local_maxrate;
}
float
calc_cpu_util_internal(float elapsed_time)
{
int i;
float actual_rate;
float correction_factor;
memset(&lib_local_cpu_stats, 0, sizeof(lib_local_cpu_stats));
/* It is possible that the library measured a time other than */
/* the one that the user want for the cpu utilization */
/* calculations - for example, tests that were ended by */
/* watchdog timers such as the udp stream test. We let these */
/* tests tell up what the elapsed time should be. */
if (elapsed_time != 0.0) {
correction_factor = (float) 1.0 +
((lib_elapsed - elapsed_time) / elapsed_time);
}
else {
correction_factor = (float) 1.0;
}
/* this looks just like the looper case. at least I think it */
/* should :) raj 4/95 */
for (i = 0; i < lib_num_loc_cpus; i++) {
/* we assume that the two are not more than a long apart. I */
/* know that this is bad, but trying to go from long longs to */
/* a float (perhaps a double) is boggling my mind right now. */
/* raj 4/95 */
long long
diff;
if (lib_end_count[i] >= lib_start_count[i]) {
diff = lib_end_count[i] - lib_start_count[i];
}
else {
diff = lib_end_count[i] - lib_start_count[i] + LONG_LONG_MAX;
}
actual_rate = (float) diff / lib_elapsed;
lib_local_per_cpu_util[i] = (lib_local_maxrate - actual_rate) /
lib_local_maxrate * 100;
lib_local_per_cpu_util[i] *= correction_factor;
lib_local_cpu_stats.cpu_util += lib_local_per_cpu_util[i];
if (debug) {
fprintf(where,
"calc_cpu_util: actual_rate on cpu %d is %g max_rate %g cpu %6.2f cf %f\n",
i,
actual_rate,
lib_local_maxrate,
lib_local_per_cpu_util[i],
correction_factor);
}
}
/* we want the average across all n processors */
lib_local_cpu_stats.cpu_util /= (float)lib_num_loc_cpus;
if (debug) {
fprintf(where,
"calc_cpu_util: average across CPUs is %g\n",
lib_local_cpu_stats.cpu_util);
}
return lib_local_cpu_stats.cpu_util;
}
void
cpu_start_internal(void)
{
get_cpu_idle(lib_start_count);
return;
}
void
cpu_stop_internal(void)
{
get_cpu_idle(lib_end_count);
}