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#include <stdio.h>
#ifdef __sun__
#include <errno.h>
#include <kstat.h>
#include <string.h>
#include <sys/sysinfo.h>
#include <sys/stat.h>
#include <sys/swap.h>
#endif
#ifdef __FreeBSD__
#include <fcntl.h>
#include <kvm.h>
#endif
#include <iostream>
#include <string.h>
#include "cpuinfometer.h"
bool getCpuinfo(Cpuinfo & cpuinfo)
{
cpuinfo.cpus = 0;
cpuinfo.speedmhz = 0;
#ifdef __linux__
FILE *fcinfo;
if ( (fcinfo = fopen("/proc/cpuinfo", "r") ) != NULL)
{
#ifdef CPUNO_ADJUST
int siblings = 1;
int cores = 1;
#endif
while (1)
{
char line[401];
int fsret = fscanf(fcinfo, "%400[^\n]\n",line);
if (fsret == EOF)
break;
char entry[201];
char value[201];
fsret = sscanf(line, "%200[^\t:]%*[\t: ]%200[^\n]", entry, value);
// cout << "entry \"" << entry << "\"" << endl
// << " value \"" << value << "\"" << endl;
if (fsret == 2)
{
// interpret the fscanned data
if (strcmp(entry, "processor") == 0)
{
cpuinfo.cpus++;
}
if (strcmp(entry, "cpu MHz") == 0)
{
sscanf(value, "%f", &cpuinfo.speedmhz);
}
#ifdef CPUNO_ADJUST
if (strcmp(entry, "siblings") == 0)
{
sscanf(value, "%d", &siblings);
}
if (strcmp(entry, "cpu cores") == 0)
{
sscanf(value, "%d", &cores);
}
#endif
// for PowerPC970, contributed by Francois Thomas <FT@fr.ibm.com>
if (strcmp(entry, "clock") == 0)
{
sscanf(value, "%fMHz", &cpuinfo.speedmhz);
}
}
}
#ifdef CPUNO_ADJUST
cpuinfo.cpus = cpuinfo.cpus * cores / siblings;
#endif
fclose(fcinfo);
return true;
}
#endif
#ifdef __FreeBSD__
// found hint to the kernal-variabel "tsc_freq" in
// /usr/src/sys/i386/i386/identcpu.c
// thats part of the kernel startup function
kvm_t *kd;
if ((kd = kvm_open(NULL, NULL, NULL, O_RDONLY, "kvm_open")) == NULL)
{
fprintf(stderr, "kvm_open failed\n");
return false;
}
struct nlist nlst[] =
{
#define X_TSC_FREQ 0
{ "_tsc_freq" },
{ 0 }
};
kvm_nlist(kd, nlst);
if (nlst[0].n_type == 0)
{
std::cerr << "kvm_nlist failed: " << std::endl;
return false;
}
unsigned int mytsc_freq;
if (kvm_read(kd, nlst[X_TSC_FREQ].n_value,
&mytsc_freq, sizeof(mytsc_freq)) != sizeof(mytsc_freq))
{
std::cerr << "kvm_read failed: " << kvm_geterr(kd) << std::endl;
return false;
}
kvm_close(kd);
cpuinfo.cpus = 1;
// FIXME: I dont have acces to a multi processor FreeBSD system
// so Ill assume, that there is at least one CPU ....
std::cout << "mytsc_freq= " << (mytsc_freq + 4999.) / 1e6 << std::endl;
cpuinfo.speedmhz = (mytsc_freq + 4999.) / 1e6;
return true;
#endif
#ifdef __sun__
struct kstat_ctl *kc;
if ((kc = kstat_open()) == 0)
{
fprintf(stderr, "Sorry, I cannot initialise the `kstat' library.\n"
"This library is used for accessing kernel information.\n"
"The diagnostics are: `%s'.\n\n", strerror(errno));
}
else
{
// CPUS zhlen
for (kstat_t * ksp = kc->kc_chain; ksp != 0; ksp = ksp->ks_next)
{
if (strncmp(ksp->ks_name, "cpu_info", 8) == 0)
{
cpuinfo.cpus++;
if (kstat_read(kc, ksp, 0) != -1)
{
kstat_named_t *kn = (kstat_named_t *)ksp->ks_data;
for (int i = 0; i < (int) ksp->ks_ndata; i++)
{
std::cout << kn->name << std::endl;
if (strcmp(kn->name, "clock_MHz") == 0)
{
cpuinfo.speedmhz = kn->value.ul;
break;
}
kn++;
}
}
}
}
if (kc != 0)
kstat_close(kc);
return true;
}
#endif
return false;
}
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