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/*
* mach interface
* Apple darwin specific
*/
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include <net-snmp/agent/hardware/cpu.h>
#include <mach/mach.h>
#include <errno.h>
static host_name_port_t host;
static struct host_basic_info hi;
/*
* Initialise the list of CPUs on the system
* (including descriptions)
*/
void init_cpu_mach( void ) {
int ret, i;
mach_msg_type_number_t size;
char *cpu_type, *cpu_subtype;
netsnmp_cpu_info *cpu;
cpu = netsnmp_cpu_get_byIdx( -1, 1 );
strcpy(cpu->name, "Overall CPU statistics");
host = mach_host_self();
size = sizeof(hi);
ret = host_info(host, HOST_BASIC_INFO, (host_info_t)&hi, &size);
if (ret != KERN_SUCCESS) {
snmp_log(LOG_ERR, "HOST_BASIC_INFO: %s - %s\n", mach_error_string(ret), strerror(errno));
return;
}
for ( i = 0; i < hi.avail_cpus; i++) {
cpu = netsnmp_cpu_get_byIdx( i, 1 );
cpu->status = 2; /* running */
sprintf( cpu->name, "cpu%d", i );
/* XXX get per-cpu type? Could it be different? */
slot_name(hi.cpu_type, hi.cpu_subtype, &cpu_type, &cpu_subtype);
sprintf( cpu->descr, "%s - %s", cpu_type, cpu_subtype );
}
cpu_num = hi.avail_cpus;
}
int netsnmp_cpu_arch_load( netsnmp_cache *cache, void *magic ) {
int i, ret;
mach_msg_type_number_t numcpu, nummsg;
processor_cpu_load_info_t pcli;
vm_statistics_data_t vmstat;
netsnmp_cpu_info *cpu, *cpu0;
/*
* Load the latest CPU usage statistics
*/
ret = host_processor_info(host, PROCESSOR_CPU_LOAD_INFO, &numcpu,
(processor_info_array_t *)&pcli,
&nummsg);
if (ret != KERN_SUCCESS) {
snmp_log(LOG_ERR, "PROCESSOR_CPU_LOAD_INFO: %s - %s\n", mach_error_string(ret), strerror(errno));
return 0;
}
cpu0 = netsnmp_cpu_get_byIdx( -1, 0 );
for ( i = 0; i < numcpu; i++) {
/* Note: using sys_ticks so that CPUSYSTEM gets calculated right. */
/* many collectors use sys2_ticks instead. */
if (i == 0) {
cpu0->user_ticks = pcli[i].cpu_ticks[CPU_STATE_USER];
cpu0->nice_ticks = pcli[i].cpu_ticks[CPU_STATE_NICE];
cpu0->sys_ticks = pcli[i].cpu_ticks[CPU_STATE_SYSTEM];
cpu0->idle_ticks = pcli[i].cpu_ticks[CPU_STATE_IDLE];
} else {
cpu0->user_ticks += pcli[i].cpu_ticks[CPU_STATE_USER];
cpu0->nice_ticks += pcli[i].cpu_ticks[CPU_STATE_NICE];
cpu0->sys_ticks += pcli[i].cpu_ticks[CPU_STATE_SYSTEM];
cpu0->idle_ticks += pcli[i].cpu_ticks[CPU_STATE_IDLE];
}
cpu = netsnmp_cpu_get_byIdx( i, 0 );
if (cpu == NULL) {
snmp_log(LOG_ERR, "forgot to create cpu #%d\n", i);
continue;
}
cpu->user_ticks = pcli[i].cpu_ticks[CPU_STATE_USER];
cpu->nice_ticks = pcli[i].cpu_ticks[CPU_STATE_NICE];
cpu->sys_ticks = pcli[i].cpu_ticks[CPU_STATE_SYSTEM];
cpu->idle_ticks = pcli[i].cpu_ticks[CPU_STATE_IDLE];
/* kern_ticks, intrpt_ticks, wait_ticks, sirq_ticks unused */
}
ret = vm_deallocate(mach_task_self(), (vm_address_t)pcli, nummsg * sizeof(int));
if (ret != KERN_SUCCESS) {
snmp_log(LOG_ERR, "vm_deallocate: %s - %s\n", mach_error_string(ret), strerror(errno));
}
/*
* Interrupt/Context Switch statistics
* XXX - Do these really belong here ?
*/
/* Darwin doesn't keep paging stats per CPU. */
nummsg = HOST_VM_INFO_COUNT;
ret = host_statistics(host, HOST_VM_INFO, (host_info_t)&vmstat, &nummsg);
if (ret != KERN_SUCCESS) {
snmp_log(LOG_ERR, "HOST_VM_INFO: %s - %s\n", mach_error_string(ret), strerror(errno));
return 0;
}
cpu0->pageIn = vmstat.pageins;
cpu0->pageOut = vmstat.pageouts;
/* not implemented: swapIn, swapOut, nInterrupts, nCtxSwitches */
}
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