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/*
* Linux /proc/cpuinfo metrics cluster
*
* Copyright (c) 2013-2014 Red Hat.
* Copyright (c) 2000-2005 Silicon Graphics, Inc. All Rights Reserved.
* Portions Copyright (c) 2001 Gilly Ran (gilly@exanet.com) - for the
* portions supporting the Alpha platform. All rights reserved.
*
* This program 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; either version 2 of the License, or (at your
* option) any later version.
*
* 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.
*/
#include <ctype.h>
#include <dirent.h>
#include <sys/stat.h>
#include "pmapi.h"
#include "impl.h"
#include "pmda.h"
#include "indom.h"
#include "proc_cpuinfo.h"
static void
decode_map(proc_cpuinfo_t *proc_cpuinfo, char *cp, int node, int offset)
{
uint32_t map = strtoul(cp, NULL, 16);
while (map) {
int i;
if ((i = ffsl(map))) {
/* the kernel returns 32bit words in the map file */
int cpu = i - 1 + 32*offset;
proc_cpuinfo->cpuinfo[cpu].node = node;
if (pmDebug & DBG_TRACE_APPL2) {
fprintf(stderr, "cpu %d -> node %d\n",
cpu, node);
}
map &= ~(1 << (i-1));
}
}
}
static void
map_cpu_nodes(proc_cpuinfo_t *proc_cpuinfo)
{
int i, j;
const char *node_path = "sys/devices/system/node";
char path[MAXPATHLEN];
char cpumap[4096];
DIR *nodes;
FILE *f;
struct dirent *de;
int node, max_node = -1;
char *cp;
pmdaIndom *idp = PMDAINDOM(NODE_INDOM);
for (i = 0; i < proc_cpuinfo->cpuindom->it_numinst; i++)
proc_cpuinfo->cpuinfo[i].node = -1;
snprintf(path, sizeof(path), "%s/%s", linux_statspath, node_path);
if ((nodes = opendir(path)) == NULL)
return;
while ((de = readdir(nodes)) != NULL) {
if (sscanf(de->d_name, "node%d", &node) != 1)
continue;
if (node > max_node)
max_node = node;
snprintf(path, sizeof(path), "%s/%s/%s/cpumap",
linux_statspath, node_path, de->d_name);
if ((f = fopen(path, "r")) == NULL)
continue;
i = fscanf(f, "%s", cpumap);
fclose(f);
if (i != 1)
continue;
for (j = 0; (cp = strrchr(cpumap, ',')); j++) {
decode_map(proc_cpuinfo, cp+1, node, j);
*cp = '\0';
}
decode_map(proc_cpuinfo, cpumap, node, j);
}
closedir(nodes);
/* initialize node indom */
idp->it_numinst = max_node + 1;
idp->it_set = calloc(max_node + 1, sizeof(pmdaInstid));
for (i = 0; i <= max_node; i++) {
char node_name[256];
sprintf(node_name, "node%d", i);
idp->it_set[i].i_inst = i;
idp->it_set[i].i_name = strdup(node_name);
}
proc_cpuinfo->node_indom = idp;
}
char *
cpu_name(proc_cpuinfo_t *proc_cpuinfo, int c)
{
char name[1024];
char *p;
FILE *f;
static int started = 0;
if (!started) {
refresh_proc_cpuinfo(proc_cpuinfo);
proc_cpuinfo->machine = NULL;
f = linux_statsfile("/proc/sgi_prominfo/node0/version", name, sizeof(name));
if (f != NULL) {
while (fgets(name, sizeof(name), f)) {
if (strncmp(name, "SGI", 3) == 0) {
if ((p = strstr(name, " IP")) != NULL)
proc_cpuinfo->machine = strndup(p+1, 4);
break;
}
}
fclose(f);
}
if (proc_cpuinfo->machine == NULL)
proc_cpuinfo->machine = strdup("linux");
started = 1;
}
snprintf(name, sizeof(name), "cpu%d", c);
return strdup(name);
}
int
refresh_proc_cpuinfo(proc_cpuinfo_t *proc_cpuinfo)
{
char buf[4096];
FILE *fp;
int cpunum;
cpuinfo_t *info;
char *val;
char *p;
static int started = 0;
if (!started) {
int need = proc_cpuinfo->cpuindom->it_numinst * sizeof(cpuinfo_t);
proc_cpuinfo->cpuinfo = (cpuinfo_t *)calloc(1, need);
for (cpunum=0; cpunum < proc_cpuinfo->cpuindom->it_numinst; cpunum++) {
proc_cpuinfo->cpuinfo[cpunum].sapic = -1;
proc_cpuinfo->cpuinfo[cpunum].vendor = -1;
proc_cpuinfo->cpuinfo[cpunum].model = -1;
proc_cpuinfo->cpuinfo[cpunum].model_name = -1;
proc_cpuinfo->cpuinfo[cpunum].stepping = -1;
proc_cpuinfo->cpuinfo[cpunum].flags = -1;
}
started = 1;
}
if ((fp = linux_statsfile("/proc/cpuinfo", buf, sizeof(buf))) == NULL)
return -oserror();
#if defined(HAVE_ALPHA_LINUX)
cpunum = 0;
#else //intel
cpunum = -1;
#endif
while (fgets(buf, sizeof(buf), fp) != NULL) {
if ((val = strrchr(buf, '\n')) != NULL)
*val = '\0';
if ((val = strchr(buf, ':')) == NULL)
continue;
val += 2;
#if !defined(HAVE_ALPHA_LINUX)
if (strncmp(buf, "processor", 9) == 0) {
cpunum++;
proc_cpuinfo->cpuinfo[cpunum].cpu_num = atoi(val);
continue;
}
#endif
if (cpunum < 0 || cpunum >= proc_cpuinfo->cpuindom->it_numinst)
continue;
info = &proc_cpuinfo->cpuinfo[cpunum];
/* note: order is important due to strNcmp comparisons */
if (info->sapic < 0 && strncasecmp(buf, "sapic", 5) == 0)
info->sapic = linux_strings_insert(val);
else if (info->model_name < 0 && strncasecmp(buf, "model name", 10) == 0)
info->model_name = linux_strings_insert(val);
else if (info->model < 0 && strncasecmp(buf, "model", 5) == 0)
info->model = linux_strings_insert(val);
else if (info->model < 0 && strncasecmp(buf, "cpu model", 9) == 0)
info->model = linux_strings_insert(val);
else if (info->vendor < 0 && strncasecmp(buf, "vendor", 6) == 0)
info->vendor = linux_strings_insert(val);
else if (info->stepping < 0 && strncasecmp(buf, "step", 4) == 0)
info->stepping = linux_strings_insert(val);
else if (info->stepping < 0 && strncasecmp(buf, "revision", 8) == 0)
info->stepping = linux_strings_insert(val);
else if (info->stepping < 0 && strncasecmp(buf, "cpu revision", 12) == 0)
info->stepping = linux_strings_insert(val);
else if (info->flags < 0 && strncasecmp(buf, "flags", 5) == 0)
info->flags = linux_strings_insert(val);
else if (info->flags < 0 && strncasecmp(buf, "features", 8) == 0)
info->flags = linux_strings_insert(val);
else if (info->cache == 0 && strncasecmp(buf, "cache size", 10) == 0)
info->cache = atoi(val);
else if (info->cache_align == 0 && strncasecmp(buf, "cache_align", 11) == 0)
info->cache_align = atoi(val);
else if (info->bogomips == 0.0 && strncasecmp(buf, "bogo", 4) == 0)
info->bogomips = atof(val);
else if (info->clock == 0.0 && strncasecmp(buf, "cpu MHz", 7) == 0)
info->clock = atof(val);
else if (info->clock == 0.0 && strncasecmp(buf, "cycle frequency", 15) == 0) {
if ((p = strchr(val, ' ')) != NULL)
*p = '\0';
info->clock = (atof(val))/1000000;
}
}
fclose(fp);
#if defined(HAVE_ALPHA_LINUX)
/* all processors are identical, therefore duplicate it to all the instances */
for (cpunum = 1; cpunum < proc_cpuinfo->cpuindom->it_numinst; cpunum++)
memcpy(&proc_cpuinfo->cpuinfo[cpunum], info, sizeof(cpuinfo_t));
#endif
if (started < 2) {
map_cpu_nodes(proc_cpuinfo);
started = 2;
}
/* success */
return 0;
}
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