X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fsvm%2Ffifo_segment.h;h=02d45d3244d6520b5289836e4d80a9e25cd0312e;hb=4339c36157c0579c60963cea4bafd3ce2521d207;hp=bb4f4080502984640710f8eb01d6f772e6ef7b12;hpb=344ce4277885e448912fdfc35bcfaf130c74d086;p=vpp.git

diff --git a/src/svm/fifo_segment.h b/src/svm/fifo_segment.h
index bb4f4080502..02d45d3244d 100644
--- a/src/svm/fifo_segment.h
+++ b/src/svm/fifo_segment.h
@@ -26,35 +26,49 @@ typedef enum
   FIFO_SEGMENT_N_FTYPES
 } fifo_segment_ftype_t;
 
-#define FIFO_SEGMENT_MIN_FIFO_SIZE 4096	/* 4kB min fifo size */
-#define FIFO_SEGMENT_MAX_FIFO_SIZE (2 << 30)	/* 2GB max fifo size */
+#define FIFO_SEGMENT_MIN_LOG2_FIFO_SIZE 12	/**< 4kB min fifo size */
+#define FIFO_SEGMENT_MIN_FIFO_SIZE 4096		/**< 4kB min fifo size */
+#define FIFO_SEGMENT_MAX_FIFO_SIZE (2 << 30)	/**< 2GB max fifo size */
 #define FIFO_SEGMENT_ALLOC_BATCH_SIZE 32	/* Allocation quantum */
 
 typedef enum fifo_segment_flags_
 {
   FIFO_SEGMENT_F_IS_PREALLOCATED = 1 << 0,
   FIFO_SEGMENT_F_WILL_DELETE = 1 << 1,
+  FIFO_SEGMENT_F_MEM_LIMIT = 1 << 2,
 } fifo_segment_flags_t;
 
-typedef struct
+typedef struct fifo_segment_slice_
 {
   svm_fifo_t *fifos;			/**< Linked list of active RX fifos */
-  svm_fifo_t **free_fifos;		/**< Freelists by fifo size  */
+  svm_fifo_t *free_fifos;		/**< Freelists by fifo size  */
   svm_fifo_chunk_t **free_chunks;	/**< Freelists by chunk size */
+  uword n_fl_chunk_bytes;		/**< Chunk bytes on freelist */
+} fifo_segment_slice_t;
+
+typedef struct
+{
+  fifo_segment_slice_t *slices;		/** Fixed array of slices */
+  ssvm_shared_header_t *ssvm_sh;	/**< Pointer to fs ssvm shared hdr */
+  uword n_free_bytes;			/**< Segment free bytes */
   u32 n_active_fifos;			/**< Number of active fifos */
+  u32 n_reserved_bytes;			/**< Bytes not to be allocated */
+  u32 max_log2_chunk_size;		/**< Max log2(chunk size) for fs */
   u8 flags;				/**< Segment flags */
+  u8 n_slices;				/**< Number of slices */
 } fifo_segment_header_t;
 
 typedef struct
 {
   ssvm_private_t ssvm;		/**< ssvm segment data */
   fifo_segment_header_t *h;	/**< fifo segment data */
+  u8 n_slices;			/**< number of fifo segment slices */
 } fifo_segment_t;
 
 typedef struct
 {
   fifo_segment_t *segments;	/**< pool of fifo segments */
-  u64 next_baseva;		/**< Where to put the next one */
+  uword next_baseva;		/**< Where to put the next one */
   u32 timeout_in_seconds;	/**< Time to wait during attach */
 } fifo_segment_main_t;
 
@@ -88,9 +102,10 @@ void fifo_segment_info (fifo_segment_t * seg, char **address, size_t * size);
  * @param ftype		fifo type @ref fifo_segment_ftype_t
  * @return		new fifo or 0 if alloc failed
  */
-svm_fifo_t *fifo_segment_alloc_fifo (fifo_segment_t * fs,
-				     u32 data_bytes,
-				     fifo_segment_ftype_t ftype);
+svm_fifo_t *fifo_segment_alloc_fifo_w_slice (fifo_segment_t * fs,
+					     u32 slice_index,
+					     u32 data_bytes,
+					     fifo_segment_ftype_t ftype);
 
 /**
  * Free fifo allocated in fifo segment
@@ -100,6 +115,31 @@ 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 slice_index,
+				     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 slice_index,
+				       u32 chunk_size, u32 batch_size);
 /**
  * Pre-allocates fifo pairs in fifo segment
  *
@@ -137,10 +177,41 @@ 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
+ */
+uword 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
+ */
+uword fifo_segment_fl_chunk_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);
+svm_fifo_t *fifo_segment_get_slice_fifo_list (fifo_segment_t * fs,
+					      u32 slice_index);
 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
  *