mirror of https://github.com/F-Stack/f-stack.git
69 lines
1.3 KiB
C
69 lines
1.3 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
|
|
* Copyright(c) 2015 Intel Corporation
|
|
*/
|
|
|
|
|
|
#ifndef LTHREAD_TIMER_H_
|
|
#define LTHREAD_TIMER_H_
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#include "lthread_int.h"
|
|
#include "lthread_sched.h"
|
|
|
|
|
|
static inline uint64_t
|
|
_ns_to_clks(uint64_t ns)
|
|
{
|
|
/*
|
|
* clkns needs to be divided by 1E9 to get ns clocks. However,
|
|
* dividing by this first would lose a lot of accuracy.
|
|
* Dividing after a multiply by ns, could cause overflow of
|
|
* uint64_t if ns is about 5 seconds [if we assume a max tsc
|
|
* rate of 4GHz]. Therefore we first divide by 1E4, then
|
|
* multiply and finally divide by 1E5. This allows ns to be
|
|
* values many hours long, without overflow, while still keeping
|
|
* reasonable accuracy.
|
|
*/
|
|
uint64_t clkns = rte_get_tsc_hz() / 1e4;
|
|
|
|
clkns *= ns;
|
|
clkns /= 1e5;
|
|
|
|
return clkns;
|
|
}
|
|
|
|
|
|
static inline void
|
|
_timer_start(struct lthread *lt, uint64_t clks)
|
|
{
|
|
if (clks > 0) {
|
|
DIAG_EVENT(lt, LT_DIAG_LTHREAD_TMR_START, <->tim, clks);
|
|
rte_timer_init(<->tim);
|
|
rte_timer_reset(<->tim,
|
|
clks,
|
|
SINGLE,
|
|
rte_lcore_id(),
|
|
_sched_timer_cb,
|
|
(void *)lt);
|
|
}
|
|
}
|
|
|
|
|
|
static inline void
|
|
_timer_stop(struct lthread *lt)
|
|
{
|
|
if (lt != NULL) {
|
|
DIAG_EVENT(lt, LT_DIAG_LTHREAD_TMR_DELETE, <->tim, 0);
|
|
rte_timer_stop(<->tim);
|
|
}
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* LTHREAD_TIMER_H_ */
|