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/* Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <libc-internal.h>
#include <stddef.h>
#include <sys/sysctl.h>
struct clockinfo
{
int hz; /* Clock frequency. */
int tick; /* Microseconds per hz tick, = 1000000 / hz. */
int tickadj; /* Clock skew rate for adjtime(). */
int stathz; /* Statistics clock frequency. */
int profhz; /* Profiling clock frequency. */
};
int
__profile_frequency (void)
{
/* Fetch the "kern.clockrate" sysctl value. */
int request[2] = { CTL_KERN, KERN_CLOCKRATE };
struct clockinfo result;
size_t result_len = sizeof (result);
if (__sysctl (request, 2, &result, &result_len, NULL, 0) < 0)
/* Dummy result. */
return 1;
/* Yes, hz, not profhz. On i386, the value is 100, not 1024. */
return result.hz;
}
libc_hidden_def (__profile_frequency)
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