diff options
Diffstat (limited to 'agent/mibgroup/hardware/cpu/cpu_sysctl.c')
| -rw-r--r-- | agent/mibgroup/hardware/cpu/cpu_sysctl.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/agent/mibgroup/hardware/cpu/cpu_sysctl.c b/agent/mibgroup/hardware/cpu/cpu_sysctl.c new file mode 100644 index 0000000..466af93 --- /dev/null +++ b/agent/mibgroup/hardware/cpu/cpu_sysctl.c @@ -0,0 +1,206 @@ +/* + * sysctl() interface + * e.g. BSD/OS, NetBSD, OpenBSD, later Darwin releases + */ +#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 <stdlib.h> +#include <unistd.h> +#include <sys/types.h> + +#if defined(__FreeBSD__) +#include <sys/resource.h> +#if !defined(CPUSTATES) +#include <sys/dkstat.h> +#endif +#else +#include <sys/sched.h> +#endif + +#include <sys/param.h> +#include <sys/sysctl.h> +#include <sys/vmmeter.h> +#ifdef HAVE_VM_VM_PARAM_H +#include <vm/vm_param.h> +#endif +#ifdef HAVE_VM_VM_EXTERN_H +#include <vm/vm_extern.h> +#endif + +void _cpu_copy_stats( netsnmp_cpu_info *cpu ); + + /* + * Initialise the list of CPUs on the system + * (including descriptions) + */ +void init_cpu_sysctl( void ) { + int i, n; + int ncpu_mib[] = { CTL_HW, HW_NCPU }; + int model_mib[] = { CTL_HW, HW_MODEL }; + char descr[ SNMP_MAXBUF ]; + netsnmp_cpu_info *cpu = netsnmp_cpu_get_byIdx( -1, 1 ); + strcpy(cpu->name, "Overall CPU statistics"); + + i = sizeof(n); + sysctl(ncpu_mib, 2, &n, (void *)&i, NULL, 0); + if ( n <= 0 ) + n = 1; /* Single CPU system */ + i = sizeof(descr); + sysctl(model_mib, 2, descr, (void *)&i, NULL, 0); + for ( i = 0; i < n; i++ ) { + cpu = netsnmp_cpu_get_byIdx( i, 1 ); + cpu->status = 2; /* running */ + sprintf( cpu->name, "cpu%d", i ); + sprintf( cpu->descr, "%s", descr ); + } + cpu_num = n; +} + + +#define NETSNMP_CPU_STATS long +#if defined(KERN_CPUSTATS) /* BSDi */ +#define NETSNMP_KERN_CPU KERN_CPUSTATS +#elif defined(KERN_CPTIME) /* OpenBSD */ +#define NETSNMP_KERN_CPU KERN_CPTIME +#elif defined(KERN_CP_TIME) /* NetBSD */ +#define NETSNMP_KERN_CPU KERN_CP_TIME + +#if defined(netbsdelf3) +#undef NETSNMP_CPU_STATS +#define NETSNMP_CPU_STATS uint64_t +#endif + +#elif defined(__FreeBSD__) +#define NETSNMP_KERN_CPU 0 /* dummy value - sysctlnametomib(2) should be used */ + +#else +#error "No CPU statistics sysctl token" +#endif + +/* + Need to check details before enabling this! +#if defined(KERN_MPCPUSTATS) +#define NETSNMP_KERN_MCPU KERN_MPCPUSTATS +#define NETSNMP_KERN_MCPU_TYPE struct mpcpustats +#elif defined(KERN_MP_CPUSTATS) +#define NETSNMP_KERN_MCPU KERN_MP_CPUSTATS +#define NETSNMP_KERN_MCPU_TYPE struct cpustats +#endif + */ + +#if defined(VM_UVMEXP2) || defined(VM_UVMEXP) + #define NS_VM_INTR intrs + #define NS_VM_SWTCH swtch + #define NS_VM_PAGEIN pageins + #define NS_VM_PAGEOUT pdpageouts + #define NS_VM_SWAPIN swapins + #define NS_VM_SWAPOUT swapouts + +#if defined(VM_UVMEXP2) /* NetBSD 1.6+ */ +#define NETSNMP_VM_STATS VM_UVMEXP2 +#define NETSNMP_VM_STATS_TYPE struct uvmexp_sysctl +#else /* VM_UVMEXP */ /* OpenBSD 3+, NetBSD 1.6+ */ +#define NETSNMP_VM_STATS VM_UVMEXP +#define NETSNMP_VM_STATS_TYPE struct uvmexp +#endif /* VM_UVMEXP2 || VM_UVMEXP */ + +#elif defined(__FreeBSD__) /* FreeBSD */ +#define NETSNMP_VM_STATS VM_METER +#define NETSNMP_VM_STATS_TYPE struct vmmeter + #define NS_VM_INTR v_intr + #define NS_VM_SWTCH v_swtch + #define NS_VM_PAGEIN v_swappgsin + #define NS_VM_PAGEOUT v_swappgsout + #define NS_VM_SWAPIN v_swapin + #define NS_VM_SWAPOUT v_swapout + +#elif defined(VM_METER) /* OpenBSD, NetBSD */ +#define NETSNMP_VM_STATS VM_METER +#define NETSNMP_VM_STATS_TYPE struct vmtotal + +#elif defined(VM_CNT) /* BSDi */ +#define NETSNMP_VM_STATS VM_CNT +#define NETSNMP_VM_STATS_TYPE struct vmmeter + #define NS_VM_INTR v_intr + #define NS_VM_SWTCH v_swtch + #undef NS_VM_PAGEIN + #undef NS_VM_PAGEOUT + #define NS_VM_SWAPIN v_swpin + #define NS_VM_SWAPOUT v_swpout +#endif + + + /* + * Load the latest CPU usage statistics + */ +int netsnmp_cpu_arch_load( netsnmp_cache *cache, void *magic ) { + int i; + + /* + * Strictly speaking, BSDi ought to use + * "struct cpustats cpu_stats" + * but this array was used in the previous code, and + * is correct for the {Open,Net}BSD versions too. + * Don't fight it, Dave - go with the flow.... + */ + NETSNMP_CPU_STATS cpu_stats[CPUSTATES]; + int cpu_mib[] = { CTL_KERN, NETSNMP_KERN_CPU }; + size_t cpu_size = sizeof(cpu_stats); +#ifdef NETSNMP_KERN_MCPU + NETSNMP_KERN_MCPU_TYPE *mcpu_stats; + int mcpu_mib[] = { CTL_KERN, NETSNMP_KERN_MCPU }; + size_t mcpu_size = sizeof(NETSNMP_KERN_MCPU_TYPE); +#endif + NETSNMP_VM_STATS_TYPE mem_stats; + int mem_mib[] = { CTL_VM, NETSNMP_VM_STATS }; + size_t mem_size = sizeof(NETSNMP_VM_STATS_TYPE); + netsnmp_cpu_info *cpu = netsnmp_cpu_get_byIdx( -1, 0 ); + +#if defined(__FreeBSD__) + sysctlbyname("kern.cp_time", cpu_stats, &cpu_size, NULL, 0); +#else + sysctl(cpu_mib, 2, cpu_stats, &cpu_size, NULL, 0); +#endif + cpu->user_ticks = (unsigned long)cpu_stats[CP_USER]; + cpu->nice_ticks = (unsigned long)cpu_stats[CP_NICE]; + cpu->sys2_ticks = (unsigned long)cpu_stats[CP_SYS]+cpu_stats[CP_INTR]; + cpu->kern_ticks = (unsigned long)cpu_stats[CP_SYS]; + cpu->idle_ticks = (unsigned long)cpu_stats[CP_IDLE]; + cpu->intrpt_ticks = (unsigned long)cpu_stats[CP_INTR]; + /* wait_ticks, sirq_ticks unused */ + + /* + * Interrupt/Context Switch statistics + * XXX - Do these really belong here ? + */ + sysctl(mem_mib, 2, &mem_stats, &mem_size, NULL, 0); + cpu->nInterrupts = (unsigned long)mem_stats.NS_VM_INTR; + cpu->nCtxSwitches = (unsigned long)mem_stats.NS_VM_SWTCH; + cpu->swapIn = (unsigned long)mem_stats.NS_VM_SWAPIN; + cpu->swapOut = (unsigned long)mem_stats.NS_VM_SWAPOUT; +#ifdef NS_VM_PAGEIN + cpu->pageIn = (unsigned long)mem_stats.NS_VM_PAGEIN; +#endif +#ifdef NS_VM_PAGEOUT + cpu->pageOut = (unsigned long)mem_stats.NS_VM_PAGEOUT; +#endif + +#ifdef NETSNMP_KERN_MCPU + mcpu_stats = malloc(cpu_num*sizeof(NETSNMP_KERN_MCPU_TYPE)); + sysctl(mcpu_mib, 2, mcpu_stats, + cpu_num*sizeof(NETSNMP_KERN_MCPU_TYPE), NULL, 0); + for ( i = 0; i < cpu_num; i++ ) { + cpu = netsnmp_cpu_get_byIdx( i, 0 ); + /* XXX - per-CPU statistics - mcpu_mib[i].??? */ + } + free(mcpu_stats); +#else + /* Copy "overall" figures to cpu0 entry */ + _cpu_copy_stats( cpu ); +#endif + + return 0; +} |