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/*
* timers.stp
*
* Test the functionality of the various timer.* probes.
*/
global p
global j1, j2, jmax
global ms1, ms500, msmax
probe begin
{
printf("systemtap starting probe\n")
}
probe timer.profile { ++p }
probe timer.jiffies(1) { ++j1 }
probe timer.jiffies(2) { ++j2 }
probe timer.jiffies(1000000) { ++jmax }
/* as long as HZ>2, ms(1) and ms(500)
* will produce different counts */
probe timer.ms(1) { ++ms1 }
probe timer.ms(500) { ++ms500 }
probe timer.ms(1000000) { ++msmax }
probe end
{
printf("systemtap ending probe\n")
printf("p = %d\n", p)
printf("j1 = %d\n", j1)
printf("j2 = %d\n", j2)
printf("jmax = %d\n", jmax)
printf("ms1 = %d\n", ms1)
printf("ms500 = %d\n", ms500)
printf("msmax = %d\n", msmax)
/* profile counter should be non-zero, and at
* least as many as the jiffies(1) counter */
/* (fudge comparison by ~1% since start & end aren't synchronized) */
if ((p > 0) && (p*100 >= j1*99)) {
printf("systemtap test success\n")
} else {
printf("unexpected profile count: %d profiles and %d jiffies\n", p, j1)
printf("systemtap test failure\n");
}
/* jiffies(1) should count more than jiffies(2),
* and both should be non-zero. */
if ((j2 > 0) && (j2 < j1)) {
printf("systemtap test success\n")
} else {
printf("unexpected jiffies count\n")
printf("systemtap test failure\n");
}
/* ms(1) should count more than ms(500),
* and both should be non-zero. */
if ((ms500 > 0) && (ms500 < ms1)) {
printf("systemtap test success\n")
} else {
printf("unexpected ms count\n")
printf("systemtap test failure\n");
}
/* both 'infinite' intervals should register zero counts */
if ((jmax == 0) && (msmax == 0)) {
printf("systemtap test success\n")
} else {
printf("unexpected count on 'infinite' interval\n")
printf("systemtap test failure\n");
}
}
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