NAME
s390runtimeinstr - enable/disable s390 CPU run-time instrumentation SYNOPSIS
#include
int s390runtimeinstr(int command, int signum); DESCRIPTION The s390runtimeinstr() system call starts or stops CPU run-time instrumentation for the calling thread.
The command argument controls whether run-time instrumentation is started (S390RUNTIMEINSTRSTART, 1) or stopped (S390RUN‐ TIMEINSTRSTOP, 2) for the calling thread.
The signum argument specifies the number of a real-time signal. The
real-time signal is sent to the thread if the run-time instrumentation
buffer is full or if the run-time-instrumentation-halted interrupt occurred. RETURN VALUE On success, s390runtimeinstr() returns 0 and enables the thread for
run-time instrumentation by assigning the thread a default run-time instrumentation control block. The caller can then read and modify the
control block and start the run-time instrumentation. On error, -1 is returned and errno is set to one of the error codes listed below. ERRORS EINVAL The value specified in command is not a valid command or the
value specified in signum is not a real-time signal number.
ENOMEM Allocating memory for the run-time instrumentation control block failed. EOPNOTSUPP
The run-time instrumentation facility is not available. VERSIONS This system call is available since Linux 3.7. CONFORMING TO
This Linux-specific system call is available only on the s390 architec‐
ture. The run-time instrumentation facility is available beginning with System z EC12. NOTES Glibc does not provide a wrapper for this system call, use syscall(2) to call it. SEE ALSO syscall(2), signal(7) COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux Programmer's Manual 2012-12-17 S390RUNTIMEINSTR(2)