S390_RUNTIME_INSTR(2) manual page
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s390_runtime_instr - enable/disable s390 CPU
run-time instrumentation
#include <asm/runtime_instr.h>int s390_runtime_instr(int command, int signum);
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_RUNTIME_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.
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.
- 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.
This system call is available
since Linux 3.7.
This Linux-specific system call is available
only on the s390 architecture. The run-time instrumentation facility is available
beginning with System z EC12.
Glibc does not provide a wrapper for
this system call, use syscall(2)
to call it.
syscall(2)
, signal(7)
This page is part of release 3.78 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/.
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