.B #c/cputime
file
.IP \-
-the amount of memory used by the process, except its stack,
-in units of 1024 bytes
+the amount of memory used by the process in units of 1024 bytes
.IP \-
the base and current scheduling priority, each 11 character numbers
.PP
With a zero argument, tracing for the proc is turned off, with a non-zero numeric
argument, it is turned on.
.TP 10n
+.B interrupt
+Interrupt a blocking system call. If no blocking call was in progress,
+the interrupt will be pending and the next attempt to block will be interrupted.
+This is similar to posting a note but, unlike notes, a pending interrupt is not
+cleared when crossing the user/kernel boundary.
+.TP 10n
+.B nointerrupt
+Clear a pending interrupt.
+.TP 10n
.B "period\ \fInu
Set the real-time scheduling period of the process to
.IR nu ,