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#define STP_NETLINK_ONLY
#define STP_NUM_STRINGS 1
#include "runtime.h"
#include "counter.c"
#include "probes.c"
MODULE_DESCRIPTION("SystemTap probe: count1");
MODULE_AUTHOR("Martin Hunt <hunt@redhat.com>");
Counter opens;
Counter reads;
Counter writes;
Counter sched;
Counter idle;
static int inst_sys_open (struct kprobe *p, struct pt_regs *regs)
{
_stp_counter_add (opens, 1);
return 0;
}
static int inst_sys_read (struct kprobe *p, struct pt_regs *regs)
{
_stp_counter_add (reads, 1);
return 0;
}
static int inst_sys_write (struct kprobe *p, struct pt_regs *regs)
{
_stp_counter_add (writes, 1);
return 0;
}
static int inst_schedule(struct kprobe *p, struct pt_regs *regs)
{
_stp_counter_add (sched, 1);
return 0;
}
static int inst_idle_cpu(struct kprobe *p, struct pt_regs *regs)
{
_stp_counter_add (idle, 1);
return 0;
}
static struct kprobe stp_probes[] = {
{
.addr = "sys_open",
.pre_handler = inst_sys_open
},
{
.addr = "sys_read",
.pre_handler = inst_sys_read
},
{
.addr = "sys_write",
.pre_handler = inst_sys_write
},
{
.addr = "schedule",
.pre_handler = inst_schedule
},
{
.addr = "idle_cpu",
.pre_handler = inst_idle_cpu
},
};
#define MAX_STP_ROUTINE (sizeof(stp_probes)/sizeof(struct kprobe))
static int pid;
module_param(pid, int, 0);
MODULE_PARM_DESC(pid, "daemon pid");
int init_module(void)
{
int ret;
if (!pid) {
printk("init: Can't start without daemon pid\n");
return -1;
}
if (_stp_transport_open(n_subbufs, subbuf_size, pid) < 0) {
printk("init: Couldn't open transport\n");
return -1;
}
opens = _stp_counter_init();
reads = _stp_counter_init();
writes = _stp_counter_init();
sched = _stp_counter_init();
idle = _stp_counter_init();
ret = _stp_register_kprobes (stp_probes, MAX_STP_ROUTINE);
return ret;
}
static void probe_exit (void)
{
int i;
_stp_unregister_kprobes (stp_probes, MAX_STP_ROUTINE);
for_each_cpu(i)
_stp_printf ("sched calls for cpu %d = %lld\n", i, _stp_counter_get_cpu(sched, i, 0));
_stp_print ("\n\n");
_stp_printf ("open calls: %lld\n", _stp_counter_get(opens, 0));
_stp_printf ("read calls: %lld\n", _stp_counter_get(reads, 0));
_stp_printf ("write calls: %lld\n", _stp_counter_get(writes, 0));
_stp_printf ("sched calls: %lld\n", _stp_counter_get(sched, 0));
_stp_printf ("idle calls: %lld\n", _stp_counter_get(idle, 0));
_stp_print_flush();
}
void cleanup_module(void)
{
_stp_transport_close();
}
MODULE_LICENSE("GPL");
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