mars/kernel/lib_timing.c

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2012-10-12 12:17:34 +00:00
// (c) 2012 Thomas Schoebel-Theuer / 1&1 Internet AG
#include "lib_timing.h"
#include <linux/kernel.h>
#include <linux/module.h>
#ifdef CONFIG_MARS_DEBUG
int report_timing(struct timing_stats *tim, char *str, int maxlen)
{
int len = 0;
int time = 1;
int resol = 1;
static const char *units[] = {
"us",
"ms",
"s",
"ERROR"
};
const char *unit = units[0];
int unit_index = 0;
int i;
for (i = 0; i < TIMING_MAX; i++) {
int this_len = snprintf(str, maxlen, "<%d%s = %d (%lld) ", resol, unit, tim->tim_count[i], (long long)tim->tim_count[i] * time);
str += this_len;
len += this_len;
maxlen -= this_len;
if (maxlen <= 1)
break;
resol <<= 1;
time <<= 1;
if (resol >= 1000) {
resol = 1;
unit = units[++unit_index];
}
}
return len;
}
EXPORT_SYMBOL_GPL(report_timing);
#endif