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Diffstat (limited to 'stap.1.in')
| -rw-r--r-- | stap.1.in | 12 |
1 files changed, 12 insertions, 0 deletions
@@ -1,3 +1,4 @@ +.\" -*- nroff -*- .TH STAP 1 @DATE@ "Red Hat" .SH NAME stap \- systemtap script translator/driver @@ -281,6 +282,10 @@ module(MPATTERN).function(PATTERN).return kernel.statement(PATTERN) .br module(MPATTERN).statement(PATTERN) +.br +timer.jiffies(NUM) +.br +timer.jiffies(NUM).randomize(RAND) .fi .RE .PP @@ -300,6 +305,10 @@ and identifies the line number in the source file, preceded by a ":". As an alternative, PATTERN may be a numeric constant, indicating an (module-relative or kernel-absolute) address. .PP +The timer-based asynchronous probe points run the given handler every +NUM jiffies. If given, the random value in the range [-RAND..RAND] is +added to NUM every time the handler is run. +.PP Here are some example probe points: .TP kernel.function("*init*"), kernel.function("*exit*") @@ -316,6 +325,9 @@ name in any of the USB drivers. kernel.statement(0xc0044852) refers to the first byte of the statement whose compiled instructions include the given address in the kernel. +.TP +timer.jiffies(1000).randomize(200) +refers to a periodic interrupt, every 1000 +/- 200 jiffies. .PP When any matching event occurs, the probe handler is run within that |