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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
{
log("systemtap starting probe")
}
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
{
log("systemtap ending probe")
log("p = " . sprint(p))
log("j1 = " . sprint(j1))
log("j2 = " . sprint(j2))
log("jmax = " . sprint(jmax))
log("ms1 = " . sprint(ms1))
log("ms500 = " . sprint(ms500))
log("msmax = " . sprint(msmax))
/* profile counter should be non-zero, and at
* least as many as the jiffies(1) counter */
if ((p > 0) && (p >= j1)) {
log("systemtap test success")
} else {
log("unexpected profile count")
log("systemtap test failure");
}
/* jiffies(1) should count more than jiffies(2),
* and both should be non-zero. */
if ((j2 > 0) && (j2 < j1)) {
log("systemtap test success")
} else {
log("unexpected jiffies count")
log("systemtap test failure");
}
/* ms(1) should count more than ms(500),
* and both should be non-zero. */
if ((ms500 > 0) && (ms500 < ms1)) {
log("systemtap test success")
} else {
log("unexpected ms count")
log("systemtap test failure");
}
/* both 'infinite' intervals should register zero counts */
if ((jmax == 0) && (msmax == 0)) {
log("systemtap test success")
} else {
log("unexpected count on 'infinite' interval")
log("systemtap test failure");
}
}
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