blob: f76972acddf2c0a0b65fc2c2468882082eeff518 [file] [log] [blame]
/*
* Copyright (C) 2012 Fusion-io
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* 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; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <inttypes.h>
#include <string.h>
#include <asm/types.h>
#include <errno.h>
#include <sys/mman.h>
#include <time.h>
#include <math.h>
#include "plot.h"
#include "blkparse.h"
#include "list.h"
#include "tracers.h"
#include "mpstat.h"
char line[1024];
int line_len = 1024;
static char record_header[] = "CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle\n";
static char record_header_v2[] = "CPU %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle\n";
int record_header_len = sizeof(record_header);
int record_header_v2_len = sizeof(record_header_v2);
static int past_eof(struct trace *trace, char *cur)
{
if (cur >= trace->mpstat_start + trace->mpstat_len)
return 1;
return 0;
}
int next_mpstat_line(struct trace *trace)
{
char *next;
char *cur = trace->mpstat_cur;
next = strchr(cur, '\n');
if (!next)
return 1;
next++;
if (past_eof(trace, next))
return 1;
trace->mpstat_cur = next;
return 0;
}
char *next_mpstat(struct trace *trace)
{
char *cur;
cur = strstr(trace->mpstat_cur, record_header);
if (cur) {
cur += record_header_len;
} else {
cur = strstr(trace->mpstat_cur, record_header_v2);
if (cur)
cur += record_header_v2_len;
}
if (!cur)
return NULL;
if (past_eof(trace, cur))
return NULL;
trace->mpstat_cur = cur;
return cur;
}
char *first_mpstat(struct trace *trace)
{
char *cur = trace->mpstat_cur;
trace->mpstat_cur = trace->mpstat_start;
cur = next_mpstat(trace);
if (!cur)
return NULL;
return cur;
}
static void find_last_mpstat_time(struct trace *trace)
{
int num_mpstats = 0;
char *cur;
first_mpstat(trace);
cur = first_mpstat(trace);
while (cur) {
num_mpstats++;
cur = next_mpstat(trace);
}
first_mpstat(trace);
trace->mpstat_seconds = num_mpstats;
}
static int guess_mpstat_cpus(struct trace *trace)
{
char *cur;
int ret;
int count = 0;
cur = first_mpstat(trace);
if (!cur)
return 0;
while (1) {
ret = next_mpstat_line(trace);
if (ret)
break;
cur = trace->mpstat_cur;
count++;
if (!cur)
break;
if (cur[0] == '\n')
break;
}
trace->mpstat_num_cpus = count - 1;
return 0;
}
static int count_mpstat_cpus(struct trace *trace)
{
char *cur = trace->mpstat_start;
char *cpu;
char *record;
int len; char *line;
first_mpstat(trace);
cpu = strstr(cur, " CPU)");
if (!cpu)
return guess_mpstat_cpus(trace);
line = strndup(cur, cpu - cur);
record = strrchr(line, '(');
if (!record) {
free(line);
return 0;
}
record++;
len = line + strlen(line) - record;
cur = strndup(record, len);
trace->mpstat_num_cpus = atoi(cur);
first_mpstat(trace);
free(line);
return trace->mpstat_num_cpus;
}
static char *guess_filename(char *trace_name)
{
struct stat st;
int ret;
char *cur;
char *tmp;
snprintf(line, line_len, "%s.mpstat", trace_name);
ret = stat(line, &st);
if (ret == 0)
return trace_name;
cur = strrchr(trace_name, '.');
if (!cur) {
return trace_name;
}
tmp = strndup(trace_name, cur - trace_name);
snprintf(line, line_len, "%s.mpstat", tmp);
ret = stat(line, &st);
if (ret == 0)
return tmp;
free(tmp);
return trace_name;
}
int read_mpstat(struct trace *trace, char *trace_name)
{
int fd;
struct stat st;
int ret;
char *p;
if (record_header_len == 0) {
record_header_len = strlen(record_header);
}
snprintf(line, line_len, "%s.mpstat", guess_filename(trace_name));
fd = open(line, O_RDONLY);
if (fd < 0)
return 0;
ret = fstat(fd, &st);
if (ret < 0) {
fprintf(stderr, "stat failed on %s err %s\n", line, strerror(errno));
goto fail_fd;
}
p = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (p == MAP_FAILED) {
fprintf(stderr, "Unable to mmap trace file %s, err %s\n", line, strerror(errno));
goto fail_fd;
}
trace->mpstat_start = p;
trace->mpstat_len = st.st_size;
trace->mpstat_cur = p;
trace->mpstat_fd = fd;
find_last_mpstat_time(trace);
count_mpstat_cpus(trace);
first_mpstat(trace);
return 0;
fail_fd:
close(fd);
return 0;
}
/*
* 09:56:26 AM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle
*
* or
*
* 10:18:51 AM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle
*
*
* this reads just one line in the mpstat
*/
int read_mpstat_event(struct trace *trace, double *user,
double *sys, double *iowait, double *irq,
double *soft)
{
char *cur = trace->mpstat_cur;
char *nptr;
double val;
/* jump past the date and CPU number */
cur += 16;
if (past_eof(trace, cur))
return 1;
/* usr time */
val = strtod(cur, &nptr);
if (val == 0 && cur == nptr)
return 1;
*user = val;
/* nice time, pitch this one */
cur = nptr;
val = strtod(cur, &nptr);
if (val == 0 && cur == nptr)
return 1;
/* system time */
cur = nptr;
val = strtod(cur, &nptr);
if (val == 0 && cur == nptr)
return 1;
*sys = val;
cur = nptr;
val = strtod(cur, &nptr);
if (val == 0 && cur == nptr)
return 1;
*iowait = val;
cur = nptr;
val = strtod(cur, &nptr);
if (val == 0 && cur == nptr)
return 1;
*irq = val;
cur = nptr;
val = strtod(cur, &nptr);
if (val == 0 && cur == nptr)
return 1;
*soft = val;
return 0;
}
int add_mpstat_gld(int time, double sys, struct graph_line_data *gld)
{
gld->data[time].sum = sys;
gld->data[time].count = 1;
return 0;
}