DPDK 22.11.5
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#include <rte_lcore.h>
#include <rte_common.h>
#include <rte_pause.h>
#include <rte_branch_prediction.h>
Go to the source code of this file.
Data Structures | |
struct | rte_mcslock |
Typedefs | |
typedef struct rte_mcslock | rte_mcslock_t |
Functions | |
static void | rte_mcslock_lock (rte_mcslock_t **msl, rte_mcslock_t *me) |
static void | rte_mcslock_unlock (rte_mcslock_t **msl, rte_mcslock_t *me) |
static int | rte_mcslock_trylock (rte_mcslock_t **msl, rte_mcslock_t *me) |
static int | rte_mcslock_is_locked (rte_mcslock_t *msl) |
RTE MCS lock
This file defines the main data structure and APIs for MCS queued lock.
The MCS lock (proposed by John M. Mellor-Crummey and Michael L. Scott) provides scalability by spinning on a CPU/thread local variable which avoids expensive cache bouncings. It provides fairness by maintaining a list of acquirers and passing the lock to each CPU/thread in the order they acquired the lock.
Definition in file rte_mcslock.h.
typedef struct rte_mcslock rte_mcslock_t |
The rte_mcslock_t type.
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inlinestatic |
Take the MCS lock.
msl | A pointer to the pointer of a MCS lock. When the lock is initialized or declared, the msl pointer should be set to NULL. |
me | A pointer to a new node of MCS lock. Each CPU/thread acquiring the lock should use its 'own node'. |
Definition at line 51 of file rte_mcslock.h.
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inlinestatic |
Release the MCS lock.
msl | A pointer to the pointer of a MCS lock. |
me | A pointer to the node of MCS lock passed in rte_mcslock_lock. |
Definition at line 103 of file rte_mcslock.h.
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inlinestatic |
Try to take the lock.
msl | A pointer to the pointer of a MCS lock. |
me | A pointer to a new node of MCS lock. |
Definition at line 144 of file rte_mcslock.h.
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inlinestatic |
Test if the lock is taken.
msl | A pointer to a MCS lock node. |
Definition at line 171 of file rte_mcslock.h.