NAME

dtrace_callout_execute — a DTrace provider for the callout API

SYNOPSIS

DESCRIPTION

The callout_execute provider allows for tracing the callout(9) mechanism.

The callout_execute:kernel::callout_start probe fires just before a callout.

The callout_execute:kernel::callout_end probe fires right after a callout.

The only argument to the callout_execute probes, args[0], is a callout handler struct callout * of the invoked callout.

EXAMPLES

callout_execute:::callout_start
{
    self->cstart = timestamp;
}

callout_execute:::callout_end
{
    @length = quantize(timestamp - self->cstart);
}

SEE ALSO

dtrace(1), tracing(7), callout(9), SDT(9)

AUTHORS

The callout_execute provider was written by Robert N. M. Watson <rwatson@FreeBSD.org>.

This manual page was written by Mateusz Piotrowski <0mp@FreeBSD.org>.