DPDK
19.11.3
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#include <stdint.h>
#include <assert.h>
#include <rte_common.h>
#include <rte_atomic.h>
#include <rte_compat.h>
Go to the source code of this file.
Functions | |
static void | rte_pause (void) |
static __rte_experimental __rte_always_inline void | rte_wait_until_equal_16 (volatile uint16_t *addr, uint16_t expected, int memorder) |
static __rte_experimental __rte_always_inline void | rte_wait_until_equal_32 (volatile uint32_t *addr, uint32_t expected, int memorder) |
static __rte_experimental __rte_always_inline void | rte_wait_until_equal_64 (volatile uint64_t *addr, uint64_t expected, int memorder) |
CPU pause operation.
Definition in file rte_pause.h.
Pause CPU execution for a short while
This call is intended for tight loops which poll a shared resource or wait for an event. A short pause within the loop may reduce the power consumption.
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Wait for *addr to be updated with a 16-bit expected value, with a relaxed memory ordering model meaning the loads around this API can be reordered.
addr | A pointer to the memory location. |
expected | A 16-bit expected value to be in the memory location. |
memorder | Two different memory orders that can be specified: __ATOMIC_ACQUIRE and __ATOMIC_RELAXED. These map to C++11 memory orders with the same names, see the C++11 standard or the GCC wiki on atomic synchronization for detailed definition. |
Definition at line 98 of file rte_pause.h.
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Wait for *addr to be updated with a 32-bit expected value, with a relaxed memory ordering model meaning the loads around this API can be reordered.
addr | A pointer to the memory location. |
expected | A 32-bit expected value to be in the memory location. |
memorder | Two different memory orders that can be specified: __ATOMIC_ACQUIRE and __ATOMIC_RELAXED. These map to C++11 memory orders with the same names, see the C++11 standard or the GCC wiki on atomic synchronization for detailed definition. |
Definition at line 108 of file rte_pause.h.
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Wait for *addr to be updated with a 64-bit expected value, with a relaxed memory ordering model meaning the loads around this API can be reordered.
addr | A pointer to the memory location. |
expected | A 64-bit expected value to be in the memory location. |
memorder | Two different memory orders that can be specified: __ATOMIC_ACQUIRE and __ATOMIC_RELAXED. These map to C++11 memory orders with the same names, see the C++11 standard or the GCC wiki on atomic synchronization for detailed definition. |
Definition at line 118 of file rte_pause.h.