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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* 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.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#if 0
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <inttypes.h>
//#include <sys/types.h>
//#include <sys/sysctl.h>
#include <errno.h>
#include <rte_common.h>
#include <rte_log.h>
#include <rte_cycles.h>
#include <rte_tailq.h>
#include <rte_memory.h>
#include <rte_memzone.h>
#include <rte_eal.h>
#include <rte_debug.h>
#include "eal_private.h"
#include "eal_internal_cfg.h"
#ifdef RTE_LIBEAL_USE_HPET
#error "should not be enabled"
//#warning HPET is not supported in FreeBSD
#endif
enum timer_source eal_timer_source = EAL_TIMER_TSC;
/* The frequency of the RDTSC timer resolution */
static uint64_t eal_tsc_resolution_hz = 0;
void
rte_delay_us(unsigned us)
{
const uint64_t start = rte_get_timer_cycles();
const uint64_t ticks = (uint64_t)us * rte_get_timer_hz() / 1E6;
while ((rte_get_timer_cycles() - start) < ticks)
rte_pause();
}
uint64_t
rte_get_tsc_hz(void)
{
return eal_tsc_resolution_hz;
}
#if 0
static int
set_tsc_freq_from_sysctl(void)
{
size_t sz;
int tmp;
sz = sizeof(tmp);
tmp = 0;
if (sysctlbyname("kern.timecounter.smp_tsc", &tmp, &sz, NULL, 0))
RTE_LOG(WARNING, EAL, "%s\n", strerror(errno));
else if (tmp != 1)
RTE_LOG(WARNING, EAL, "TSC is not safe to use in SMP mode\n");
tmp = 0;
if (sysctlbyname("kern.timecounter.invariant_tsc", &tmp, &sz, NULL, 0))
RTE_LOG(WARNING, EAL, "%s\n", strerror(errno));
else if (tmp != 1)
RTE_LOG(WARNING, EAL, "TSC is not invariant\n");
sz = sizeof(eal_tsc_resolution_hz);
if (sysctlbyname("machdep.tsc_freq", &eal_tsc_resolution_hz, &sz, NULL, 0)) {
RTE_LOG(WARNING, EAL, "%s\n", strerror(errno));
return -1;
}
return 0;
}
#endif
static void
set_tsc_freq_fallback(void)
{
RTE_LOG(WARNING, EAL, "WARNING: clock_gettime cannot use "
"CLOCK_MONOTONIC_RAW and HPET is not available"
" - clock timings may be less accurate.\n");
/* assume that the sleep(1) will sleep for 1 second */
uint64_t start = rte_rdtsc();
sleep(1);
eal_tsc_resolution_hz = rte_rdtsc() - start;
}
/*
* This function measures the TSC frequency. It uses a variety of approaches.
*
* 1. Read the TSC frequency value provided by the kernel
* 2. If above does not work, just sleep for 1 second and tune off that,
* printing a warning about inaccuracy of timing
*/
static void
set_tsc_freq(void)
{
//if (set_tsc_freq_from_sysctl() < 0)
set_tsc_freq_fallback();
RTE_LOG(INFO, EAL, "TSC frequency is ~%"PRIu64" KHz\n",
eal_tsc_resolution_hz/1000);
}
int
rte_eal_timer_init(void)
{
set_tsc_freq();
return 0;
}
#endif
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