[v18,2/8] eal: add thread attributes
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Commit Message
From: Narcisa Vasile <navasile@microsoft.com>
Implement thread attributes for:
* thread affinity
* thread priority
Implement functions for managing thread attributes.
Priority is represented through an enum that allows for two levels:
- RTE_THREAD_PRIORITY_NORMAL
- RTE_THREAD_PRIORITY_REALTIME_CRITICAL
Affinity is described by the rte_cpuset_t type.
An rte_thread_attr_t object can be set to the default values
by calling rte_thread_attr_init().
Signed-off-by: Narcisa Vasile <navasile@microsoft.com>
---
lib/eal/common/rte_thread.c | 46 ++++++++++++++++++
lib/eal/include/rte_thread.h | 91 ++++++++++++++++++++++++++++++++++++
lib/eal/version.map | 4 ++
lib/eal/windows/rte_thread.c | 44 +++++++++++++++++
4 files changed, 185 insertions(+)
@@ -9,6 +9,7 @@
#include <string.h>
#include <rte_common.h>
+#include <rte_debug.h>
#include <rte_errno.h>
#include <rte_log.h>
#include <rte_thread.h>
@@ -33,6 +34,51 @@ rte_thread_equal(rte_thread_t t1, rte_thread_t t2)
return pthread_equal((pthread_t)t1.opaque_id, (pthread_t)t2.opaque_id);
}
+int
+rte_thread_attr_init(rte_thread_attr_t *attr)
+{
+ RTE_VERIFY(attr != NULL);
+
+ CPU_ZERO(&attr->cpuset);
+ attr->priority = RTE_THREAD_PRIORITY_NORMAL;
+
+ return 0;
+}
+
+int
+rte_thread_attr_set_affinity(rte_thread_attr_t *thread_attr,
+ rte_cpuset_t *cpuset)
+{
+ RTE_VERIFY(thread_attr != NULL);
+ RTE_VERIFY(cpuset != NULL);
+
+ thread_attr->cpuset = *cpuset;
+
+ return 0;
+}
+
+int
+rte_thread_attr_get_affinity(rte_thread_attr_t *thread_attr,
+ rte_cpuset_t *cpuset)
+{
+ RTE_VERIFY(thread_attr != NULL);
+ RTE_VERIFY(cpuset != NULL);
+
+ *cpuset = thread_attr->cpuset;
+
+ return 0;
+}
+
+int
+rte_thread_attr_set_priority(rte_thread_attr_t *thread_attr,
+ enum rte_thread_priority priority)
+{
+ RTE_VERIFY(thread_attr != NULL);
+
+ thread_attr->priority = priority;
+ return 0;
+}
+
int
rte_thread_key_create(rte_thread_key *key, void (*destructor)(void *))
{
@@ -31,6 +31,28 @@ typedef struct rte_thread_tag {
uintptr_t opaque_id; /**< thread identifier */
} rte_thread_t;
+/**
+ * Thread priority values.
+ */
+enum rte_thread_priority {
+ RTE_THREAD_PRIORITY_NORMAL = 0,
+ /**< normal thread priority, the default */
+ RTE_THREAD_PRIORITY_REALTIME_CRITICAL = 1,
+ /**< highest thread priority allowed */
+};
+
+#ifdef RTE_HAS_CPUSET
+
+/**
+ * Representation for thread attributes.
+ */
+typedef struct {
+ enum rte_thread_priority priority; /**< thread priority */
+ rte_cpuset_t cpuset; /**< thread affinity */
+} rte_thread_attr_t;
+
+#endif /* RTE_HAS_CPUSET */
+
/**
* TLS key type, an opaque pointer.
*/
@@ -63,6 +85,75 @@ int rte_thread_equal(rte_thread_t t1, rte_thread_t t2);
#ifdef RTE_HAS_CPUSET
+/**
+ * Initialize the attributes of a thread.
+ * These attributes can be passed to the rte_thread_create() function
+ * that will create a new thread and set its attributes according to attr.
+ *
+ * @param attr
+ * Thread attributes to initialize.
+ *
+ * @return
+ * On success, return 0.
+ * On failure, return a positive errno-style error number.
+ */
+__rte_experimental
+int rte_thread_attr_init(rte_thread_attr_t *attr);
+
+/**
+ * Set the CPU affinity value in the thread attributes pointed to
+ * by 'thread_attr'.
+ *
+ * @param thread_attr
+ * Points to the thread attributes in which affinity will be updated.
+ *
+ * @param cpuset
+ * Points to the value of the affinity to be set.
+ *
+ * @return
+ * On success, return 0.
+ * On failure, return a positive errno-style error number.
+ */
+__rte_experimental
+int rte_thread_attr_set_affinity(rte_thread_attr_t *thread_attr,
+ rte_cpuset_t *cpuset);
+
+/**
+ * Get the value of CPU affinity that is set in the thread attributes pointed
+ * to by 'thread_attr'.
+ *
+ * @param thread_attr
+ * Points to the thread attributes from which affinity will be retrieved.
+ *
+ * @param cpuset
+ * Pointer to the memory that will store the affinity.
+ *
+ * @return
+ * On success, return 0.
+ * On failure, return a positive errno-style error number.
+ */
+__rte_experimental
+int rte_thread_attr_get_affinity(rte_thread_attr_t *thread_attr,
+ rte_cpuset_t *cpuset);
+
+/**
+ * Set the thread priority value in the thread attributes pointed to
+ * by 'thread_attr'.
+ *
+ * @param thread_attr
+ * Points to the thread attributes in which priority will be updated.
+ *
+ * @param priority
+ * Points to the value of the priority to be set.
+ *
+ * @return
+ * On success, return 0.
+ * On failure, return a positive errno-style error number.
+ */
+__rte_experimental
+int rte_thread_attr_set_priority(rte_thread_attr_t *thread_attr,
+ enum rte_thread_priority priority);
+
/**
* Set core affinity of the current thread.
* Support both EAL and non-EAL thread and update TLS.
@@ -423,6 +423,10 @@ EXPERIMENTAL {
rte_thread_self;
rte_thread_equal;
+ rte_thread_attr_init;
+ rte_thread_attr_get_affinity;
+ rte_thread_attr_set_affinity;
+ rte_thread_attr_set_priority;
};
INTERNAL {
@@ -4,6 +4,7 @@
*/
#include <rte_common.h>
+#include <rte_debug.h>
#include <rte_errno.h>
#include <rte_thread.h>
#include <rte_windows.h>
@@ -28,6 +29,49 @@ rte_thread_equal(rte_thread_t t1, rte_thread_t t2)
return t1.opaque_id == t2.opaque_id;
}
+int
+rte_thread_attr_init(rte_thread_attr_t *attr)
+{
+ RTE_VERIFY(attr != NULL);
+
+ attr->priority = RTE_THREAD_PRIORITY_NORMAL;
+ CPU_ZERO(&attr->cpuset);
+
+ return 0;
+}
+
+int
+rte_thread_attr_set_affinity(rte_thread_attr_t *thread_attr,
+ rte_cpuset_t *cpuset)
+{
+ RTE_VERIFY(thread_attr != NULL);
+ thread_attr->cpuset = *cpuset;
+
+ return 0;
+}
+
+int
+rte_thread_attr_get_affinity(rte_thread_attr_t *thread_attr,
+ rte_cpuset_t *cpuset)
+{
+ RTE_VERIFY(thread_attr != NULL);
+
+ *cpuset = thread_attr->cpuset;
+
+ return 0;
+}
+
+int
+rte_thread_attr_set_priority(rte_thread_attr_t *thread_attr,
+ enum rte_thread_priority priority)
+{
+ RTE_VERIFY(thread_attr != NULL);
+
+ thread_attr->priority = priority;
+
+ return 0;
+}
+
int
rte_thread_key_create(rte_thread_key *key,
__rte_unused void (*destructor)(void *))