x SuSE Linux 13.1-RELEASE x
x SuSE Linux 13.1-RELEASEx
S390_RUNTIME_INSTR(2) System Calls Manual S390_RUNTIME_INSTR(2)
NAME
s390_runtime_instr - enable/disable s390 CPU run-time instrumentation
SYNOPSIS
#include <asm/runtime_instr.h>
int s390_runtime_instr(int command, int signum);
DESCRIPTION
The s390_runtime_instr() system call starts or stops CPU run-time
instrumentation for the calling thread.
The command argument controls whether run-time instrumentation is
started (S390_RUNTIME_INSTR_START, 1) or stopped (S390_RUN-
TIME_INSTR_STOP, 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, s390_runtime_instr() 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 3.69 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
http://www.kernel.org/doc/man-pages/.
Linux Programmer's Manual 2012-12-17 S390_RUNTIME_INSTR(2)
Want to link to this manual page? Use this URL:
<http://star2.abcm.com/cgi-bin/bsdi-man?query=s390_runtime_instr&sektion=2&manpath=>