Attachment 301634 Details for Bug 433659 – get_clock.h

get_clock.h

get_clock.h (text/plain), 2.49 KB, created by Doug Ledford on 2008-04-08 14:02:23 UTC

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Creator: Doug Ledford

Created: 2008-04-08 14:02:23 UTC

Size: 2.49 KB

patch

obsolete

>/*
> * Copyright (c) 2005 Mellanox Technologies Ltd.  All rights reserved.
> *
> * This software is available to you under a choice of one of two
> * licenses.  You may choose to be licensed under the terms of the GNU
> * General Public License (GPL) Version 2, available from the file
> * COPYING in the main directory of this source tree, or the
> * OpenIB.org BSD license below:
> *
> *     Redistribution and use in source and binary forms, with or
> *     without modification, are permitted provided that the following
> *     conditions are met:
> *
> *      - Redistributions of source code must retain the above
> *        copyright notice, this list of conditions and the following
> *        disclaimer.
> *
> *      - Redistributions in binary form must reproduce the above
> *        copyright notice, this list of conditions and the following
> *        disclaimer in the documentation and/or other materials
> *        provided with the distribution.
> *
> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
> * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
> * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
> * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
> * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
> * SOFTWARE.
> *
> * $Id$
> *
> * Author: Michael S. Tsirkin <mst@mellanox.co.il>
> */
>
>#ifndef GET_CLOCK_H
>#define GET_CLOCK_H
>
>#if defined (__x86_64__) || defined(__i386__)
>/* Note: only x86 CPUs which have rdtsc instruction are supported. */
>typedef unsigned long long cycles_t;
>static inline cycles_t get_cycles()
>{
>	unsigned low, high;
>	unsigned long long val;
>	asm volatile ("rdtsc" : "=a" (low), "=d" (high));
>	val = high;
>	val = (val << 32) | low;
>	return val;
>}
>#elif defined(__PPC__) || defined(__PPC64__)
>/* Note: only PPC CPUs which have mftb instruction are supported. */
>/* PPC64 has mftb */
>typedef unsigned long cycles_t;
>static inline cycles_t get_cycles()
>{
>	cycles_t ret;
>
>	asm volatile ("mftb %0" : "=r" (ret) : );
>	return ret;
>}
>#elif defined(__ia64__)
>/* Itanium2 and up has ar.itc (Itanium1 has errata) */
>typedef unsigned long cycles_t;
>static inline cycles_t get_cycles()
>{
>	cycles_t ret;
>
>	asm volatile ("mov %0=ar.itc" : "=r" (ret));
>	return ret;
>}
>
>#else
>#warning get_cycles not implemented for this architecture: attempt asm/timex.h
>#include <asm/timex.h>
>#endif
>
>extern double get_cpu_mhz(void);
>
>#endif

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Attachments on bug 433659: 301633 | 301634 | 301635