PR_SET_TSC
change whether the timestamp counter can be read by the process
- Provided by: manpages-dev (Version: 6.9.1-1)
- Source: manpages
- Report a bug
LIBRARY
Standard C library (libc, -lc)
SYNOPSIS
#include <linux/prctl.h> /* Definition of PR_* constants */ #include <sys/prctl.h>
int prctl(PR_SET_TSC, long flag);
DESCRIPTION
Set the state of the flag determining whether the timestamp counter can be read by the process. Pass PR_TSC_ENABLE to flag to allow it to be read, or PR_TSC_SIGSEGV to generate a SIGSEGV when the process tries to read the timestamp counter.
RETURN VALUE
On success, 0 is returned. On error, -1 is returned, and errno is set to indicate the error.
ERRORS
- EINVAL
- arg2 is not a valid value.
STANDARDS
Linux. x86 only.
HISTORY
Linux 2.6.26 (x86).