X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fsvm%2Ffifo_segment.h;h=ee5c24d04bbd7d5f20ee370b331a2c568d19c7e1;hb=6d7552ca885fe385818d380d7e0b4aff03c59d83;hp=bb4f4080502984640710f8eb01d6f772e6ef7b12;hpb=344ce4277885e448912fdfc35bcfaf130c74d086;p=vpp.git diff --git a/src/svm/fifo_segment.h b/src/svm/fifo_segment.h index bb4f4080502..ee5c24d04bb 100644 --- a/src/svm/fifo_segment.h +++ b/src/svm/fifo_segment.h @@ -16,6 +16,7 @@ #define __included_fifo_segment_h__ #include +#include #include typedef enum @@ -26,35 +27,53 @@ 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 +#define foreach_segment_mem_status \ +_(NO_PRESSURE, "No pressure") \ +_(LOW_PRESSURE, "Low pressure") \ +_(HIGH_PRESSURE, "High pressure") \ +_(NO_MEMORY, "No memory") + +typedef enum { - svm_fifo_t *fifos; /**< Linked list of active RX fifos */ - svm_fifo_t **free_fifos; /**< Freelists by fifo size */ - svm_fifo_chunk_t **free_chunks; /**< Freelists by chunk size */ - u32 n_active_fifos; /**< Number of active fifos */ - u8 flags; /**< Segment flags */ -} fifo_segment_header_t; +#define _(sym,str) MEMORY_PRESSURE_##sym, + foreach_segment_mem_status +#undef _ + MEMORY_N_PRESSURE, +} fifo_segment_mem_status_t; + +#if 0 +typedef enum fifo_segment_mem_status_ +{ + MEMORY_PRESSURE_NO_PRESSURE, + MEMORY_PRESSURE_LOW_PRESSURE, + MEMORY_PRESSURE_HIGH_PRESSURE, + MEMORY_PRESSURE_NO_MEMORY, +} fifo_segment_mem_status_t; +#endif 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 +107,10 @@ 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 +120,35 @@ svm_fifo_t *fifo_segment_alloc_fifo (fifo_segment_t * fs, */ void fifo_segment_free_fifo (fifo_segment_t * fs, svm_fifo_t * f); +void fifo_segment_detach_fifo (fifo_segment_t * fs, svm_fifo_t * f); +void fifo_segment_attach_fifo (fifo_segment_t * fs, svm_fifo_t * f, + u32 slice_index); + +/** + * 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 * @@ -118,29 +167,100 @@ void fifo_segment_preallocate_fifo_pairs (fifo_segment_t * fs, u32 rx_fifo_size, u32 tx_fifo_size, u32 * n_fifo_pairs); + /** - * Grow fifo size by adding an additional chunk of memory + * Allocate chunks in fifo segment * - * @param fs fifo segment for fifo - * @param f fifo to be grown - * @param chunk_size number of bytes to be added to fifo - * @return 0 on success or a negative number otherwise + * @param fsh fifo segment header + * @param slice_index slice where chunks should be alocated + * @param chunk_size chunk size needed + * @return chunk (or chunks) that cover at least chunk_size bytes + * on success, 0 on failure. */ -int fifo_segment_grow_fifo (fifo_segment_t * fs, svm_fifo_t * f, - u32 chunk_size); +svm_fifo_chunk_t *fsh_alloc_chunk (fifo_segment_header_t * fsh, + u32 slice_index, u32 chunk_size); /** - * Collect unused chunks for fifo + * Return chunks to fifo segment * - * @param fs fifo segment for fifo - * @param f fifo whose chunks are to be collected - * @return 0 on success, error otherwise + * @param fsh fifo segment header + * @param slice_index slice where chunks should be returned + * @param c pointer to first chunk in 0 terminated linked list + */ +void fsh_collect_chunks (fifo_segment_header_t * fsh, u32 slice_index, + svm_fifo_chunk_t * c); + +/** + * Fifo segment has reached mem limit + * + * @param fsh fifo segment header + * @return 1 (if reached) or 0 (otherwise) + */ +u8 fsh_has_reached_mem_limit (fifo_segment_header_t * fsh); + +/** + * Fifo segment reset mem limit flag + * + * @param fs fifo segment */ -int fifo_segment_collect_fifo_chunks (fifo_segment_t * fs, svm_fifo_t * f); +void fsh_reset_mem_limit (fifo_segment_header_t * fsh); + +/** + * Fifo segment allocated size + * + * Returns fifo segment's allocated size + * + * @param fs fifo segment + * @return allocated size in bytes + */ +uword fifo_segment_size (fifo_segment_t * fs); + +/** + * 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); + +/** + * Fifo segment number of cached bytes + * + * Returns fifo segment's number of cached bytes. + * + * @param fs fifo segment + * @return cached bytes + */ +uword fifo_segment_cached_bytes (fifo_segment_t * fs); + +uword fifo_segment_available_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 * @@ -150,6 +270,11 @@ u32 fifo_segment_num_free_fifos (fifo_segment_t * fs, u32 fifo_size_in_bytes); */ u32 fifo_segment_num_free_chunks (fifo_segment_t * fs, u32 size); +u8 fifo_segment_get_mem_usage (fifo_segment_t * fs); +fifo_segment_mem_status_t fifo_segment_determine_status + (fifo_segment_header_t * fsh, u8 usage); +fifo_segment_mem_status_t fifo_segment_get_mem_status (fifo_segment_t * fs); + void fifo_segment_main_init (fifo_segment_main_t * sm, u64 baseva, u32 timeout_in_seconds);