summaryrefslogtreecommitdiffstats
path: root/src/svm/fifo_segment.h
diff options
context:
space:
mode:
authorFlorin Coras <fcoras@cisco.com>2019-05-11 16:55:53 -0700
committerDave Barach <openvpp@barachs.net>2019-05-14 18:40:20 +0000
commitf9d4ab42724b260d5c242f7291d05f74cd725d7d (patch)
treee73966462c7c8ebc36cc2d7f0147ee1f81e4ba25 /src/svm/fifo_segment.h
parent0224514c28bdee05ea11a89a721c810e5f99ede2 (diff)
svm: improve fifo segment prealloc support
- track fifo segment free and chunk freelist memory - improve fifo alloc. If there are enough chunks to satisfy a fifo allocation request but not enough free memory, allocate a multi-chunk fifo - add apis to preallocate chunks and fifo headers - more tests Change-Id: If18dba7ab856272c9f565d36ac36365139793e0b Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/svm/fifo_segment.h')
-rw-r--r--src/svm/fifo_segment.h58
1 files changed, 57 insertions, 1 deletions
diff --git a/src/svm/fifo_segment.h b/src/svm/fifo_segment.h
index 182ab408737..89d4ef9c8c7 100644
--- a/src/svm/fifo_segment.h
+++ b/src/svm/fifo_segment.h
@@ -43,6 +43,8 @@ typedef struct
svm_fifo_chunk_t **free_chunks; /**< Freelists by chunk size */
u32 n_active_fifos; /**< Number of active fifos */
u8 flags; /**< Segment flags */
+ u32 n_free_bytes; /**< Bytes usable for new allocs */
+ u32 n_fl_chunk_bytes; /**< Chunk bytes on freelist */
} fifo_segment_header_t;
typedef struct
@@ -101,6 +103,30 @@ svm_fifo_t *fifo_segment_alloc_fifo (fifo_segment_t * fs,
void fifo_segment_free_fifo (fifo_segment_t * fs, svm_fifo_t * f);
/**
+ * Try to preallocate fifo headers
+ *
+ * Tries to preallocate fifo headers and adds them to freelist.
+ *
+ * @param fs fifo segment
+ * @param batch_size number of chunks to be allocated
+ * @return 0 on success, negative number otherwise
+ */
+int fifo_segment_prealloc_fifo_hdrs (fifo_segment_t * fs, u32 batch_size);
+
+/**
+ * Try to preallocate fifo chunks on segment
+ *
+ * Tries to preallocate chunks of requested size on segment and adds them
+ * to chunk freelist.
+ *
+ * @param fs fifo segment
+ * @param chunk_size size of chunks to be allocated in bytes
+ * @param batch_size number of chunks to be allocated
+ * @return 0 on success, negative number otherwise
+ */
+int fifo_segment_prealloc_fifo_chunks (fifo_segment_t * fs, u32 chunk_size,
+ u32 batch_size);
+/**
* Pre-allocates fifo pairs in fifo segment
*
* The number of fifos pre-allocated is the minimum of the requested number
@@ -137,10 +163,40 @@ int fifo_segment_grow_fifo (fifo_segment_t * fs, svm_fifo_t * f,
* @return 0 on success, error otherwise
*/
int fifo_segment_collect_fifo_chunks (fifo_segment_t * fs, svm_fifo_t * f);
+
+/**
+ * Fifo segment estimate of number of free bytes
+ *
+ * Returns fifo segment's internal estimate of the number of free bytes.
+ * To force a synchronization between the segment and the underlying
+ * memory allocator, call @ref fifo_segment_update_free_bytes
+ *
+ * @param fs fifo segment
+ * @return free bytes estimate
+ */
+u32 fifo_segment_free_bytes (fifo_segment_t * fs);
+
+/**
+ * Update fifo segment free bytes estimate
+ *
+ * Forces fifo segment free bytes estimate synchronization with underlying
+ * memory allocator.
+ *
+ * @param fs fifo segment
+ */
+void fifo_segment_update_free_bytes (fifo_segment_t * fs);
+
+/**
+ * Number of bytes on chunk free lists
+ *
+ * @param fs fifo segment
+ * @return free bytes on chunk free lists
+ */
+u32 fifo_segment_chunk_prealloc_bytes (fifo_segment_t * fs);
u8 fifo_segment_has_fifos (fifo_segment_t * fs);
svm_fifo_t *fifo_segment_get_fifo_list (fifo_segment_t * fs);
u32 fifo_segment_num_fifos (fifo_segment_t * fs);
-u32 fifo_segment_num_free_fifos (fifo_segment_t * fs, u32 fifo_size_in_bytes);
+u32 fifo_segment_num_free_fifos (fifo_segment_t * fs);
/**
* Find number of free chunks of given size
*