-/*-
- * 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.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation
*/
#include <string.h>
#include <unistd.h>
#include <inttypes.h>
#include <sys/types.h>
-#include <sys/sysctl.h>
+#include <time.h>
#include <errno.h>
#include <rte_common.h>
+#include <rte_compat.h>
#include <rte_log.h>
#include <rte_cycles.h>
+#include <rte_pause.h>
#include "eal_private.h"
/* The frequency of the RDTSC timer resolution */
static uint64_t eal_tsc_resolution_hz;
+/* Pointer to user delay function */
+void (*rte_delay_us)(unsigned int) = NULL;
+
void
-rte_delay_us(unsigned us)
+rte_delay_us_block(unsigned int us)
{
const uint64_t start = rte_get_timer_cycles();
const uint64_t ticks = (uint64_t)us * rte_get_timer_hz() / 1E6;
rte_pause();
}
+void __rte_experimental
+rte_delay_us_sleep(unsigned int us)
+{
+ struct timespec wait[2];
+ int ind = 0;
+
+ wait[0].tv_sec = 0;
+ if (us >= US_PER_S) {
+ wait[0].tv_sec = us / US_PER_S;
+ us -= wait[0].tv_sec * US_PER_S;
+ }
+ wait[0].tv_nsec = 1000 * us;
+
+ while (nanosleep(&wait[ind], &wait[1 - ind]) && errno == EINTR) {
+ /*
+ * Sleep was interrupted. Flip the index, so the 'remainder'
+ * will become the 'request' for a next call.
+ */
+ ind = 1 - ind;
+ }
+}
+
uint64_t
rte_get_tsc_hz(void)
{
static uint64_t
estimate_tsc_freq(void)
{
+#define CYC_PER_10MHZ 1E7
RTE_LOG(WARNING, EAL, "WARNING: TSC frequency estimated roughly"
" - clock timings may be less accurate.\n");
/* assume that the sleep(1) will sleep for 1 second */
uint64_t start = rte_rdtsc();
sleep(1);
- return rte_rdtsc() - start;
+ /* Round up to 10Mhz. 1E7 ~ 10Mhz */
+ return RTE_ALIGN_MUL_NEAR(rte_rdtsc() - start, CYC_PER_10MHZ);
}
void
set_tsc_freq(void)
{
- uint64_t freq = get_tsc_freq() || estimate_tsc_freq();
- RTE_LOG(INFO, EAL, "TSC frequency is ~%" PRIu64 " KHz\n", freq / 1000);
+ uint64_t freq;
+
+ freq = get_tsc_freq_arch();
+ if (!freq)
+ freq = get_tsc_freq();
+ if (!freq)
+ freq = estimate_tsc_freq();
+
+ RTE_LOG(DEBUG, EAL, "TSC frequency is ~%" PRIu64 " KHz\n", freq / 1000);
eal_tsc_resolution_hz = freq;
}
+
+void rte_delay_us_callback_register(void (*userfunc)(unsigned int))
+{
+ rte_delay_us = userfunc;
+}
+
+RTE_INIT(rte_timer_init)
+{
+ /* set rte_delay_us_block as a delay function */
+ rte_delay_us_callback_register(rte_delay_us_block);
+}