int __init net_profile_init(void)
{
int i;
#ifdef CONFIG_PROC_FS
create_proc_read_entry("net/profile", 0, 0, profile_read_proc, NULL);
#endif
register_netdevice(&whitehole_dev);
printk("Evaluating net profiler cost ...");
#ifdef __alpha__
alpha_tick(0);
#endif
for (i=0; i<1024; i++) {
NET_PROFILE_ENTER(total);
NET_PROFILE_LEAVE(total);
}
if (net_prof_total.accumulator.tv_sec) {
printk(" too high!\n");
} else {
net_profile_adjust.tv_usec = net_prof_total.accumulator.tv_usec>>10;
printk("%ld units\n", net_profile_adjust.tv_usec);
}
net_prof_total.hits = 0;
net_profile_stamp(&net_prof_total.entered);
return 0;
}
__initfunc(int net_profile_init(void))
{
int i;
#ifdef CONFIG_PROC_FS
struct proc_dir_entry *ent;
ent = create_proc_entry("net/profile", 0, 0);
ent->read_proc = profile_read_proc;
#endif
register_netdevice(&whitehole_dev);
printk("Evaluating net profiler cost ...");
#if CPU == 586 || CPU == 686
if (!(boot_cpu_data.x86_capability & X86_FEATURE_TSC)) {
printk(KERN_ERR "Sorry, your CPU does not support TSC. Net profiler disabled.\n");
return -1;
}
#endif
start_bh_atomic();
#ifdef __alpha__
alpha_tick(0);
#endif
for (i=0; i<1024; i++) {
NET_PROFILE_ENTER(total);
NET_PROFILE_LEAVE(total);
}
if (net_prof_total.accumulator.tv_sec) {
printk(" too high!\n");
} else {
net_profile_adjust.tv_usec = net_prof_total.accumulator.tv_usec>>10;
printk("%ld units\n", net_profile_adjust.tv_usec);
}
net_prof_total.hits = 0;
net_profile_stamp(&net_prof_total.entered);
end_bh_atomic();
return 0;
}
static int profile_read_proc(char *buffer, char **start, off_t offset,
int length, int *eof, void *data)
{
off_t pos=0;
off_t begin=0;
int len=0;
struct net_profile_slot *s;
len+= sprintf(buffer, "Slot Hits Hi Lo OnIrqHi OnIrqLo Ufl\n");
if (offset == 0) {
cli();
net_prof_total.active = 1;
atomic_inc(&net_profile_active);
NET_PROFILE_LEAVE(total);
sti();
}
for (s = net_profile_chain; s; s = s->next) {
struct net_profile_slot tmp;
cli();
tmp = *s;
/* Wrong, but pretty close to truth */
s->accumulator.tv_sec = 0;
s->accumulator.tv_usec = 0;
s->irq.tv_sec = 0;
s->irq.tv_usec = 0;
s->hits = 0;
s->underflow = 0;
/* Repair active count, it is possible, only if code has a bug */
if (s->active) {
s->active = 0;
atomic_dec(&net_profile_active);
}
sti();
net_profile_sub(&tmp.irq, &tmp.accumulator);
len += sprintf(buffer+len,"%-15s %-10d %-10ld %-10lu %-10lu %-10lu %d/%d",
tmp.id,
tmp.hits,
tmp.accumulator.tv_sec,
tmp.accumulator.tv_usec,
tmp.irq.tv_sec,
tmp.irq.tv_usec,
tmp.underflow, tmp.active);
buffer[len++]='\n';
pos=begin+len;
if(pos<offset) {
len=0;
begin=pos;
}
if(pos>offset+length)
goto done;
}
*eof = 1;
done:
*start=buffer+(offset-begin);
len-=(offset-begin);
if(len>length)
len=length;
if (len < 0) {
len = 0;
printk(KERN_CRIT "Yep, guys... our template for proc_*_read is crappy :-)\n");
}
if (offset == 0) {
cli();
net_prof_total.active = 0;
net_prof_total.hits = 0;
net_profile_stamp(&net_prof_total.entered);
sti();
}
return len;
}
