X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fsvm%2Ffifo_segment.h;h=2e193029e850f4ef7655524e3c0571af8717bdc6;hb=f8f88eff66d8584eca8c570c22967c3d85fce020;hp=ff36f45c4f27523a019996e296dc16e90db96d90;hpb=62ddc030296e9f65c59cd25fa81112e0a09cf20d;p=vpp.git diff --git a/src/svm/fifo_segment.h b/src/svm/fifo_segment.h index ff36f45c4f2..2e193029e85 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 @@ -35,26 +36,32 @@ 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 fifo_segment_slice_ +#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_fl_chunk_bytes; /**< Chunk bytes on freelist */ -} fifo_segment_slice_t; +#define _(sym,str) MEMORY_PRESSURE_##sym, + foreach_segment_mem_status +#undef _ + MEMORY_N_PRESSURE, +} fifo_segment_mem_status_t; -typedef struct +#if 0 +typedef enum fifo_segment_mem_status_ { - 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 max_log2_chunk_size; /**< Max log2(chunk size) for fs */ - u8 flags; /**< Segment flags */ - u8 n_slices; /**< Number of slices */ -} fifo_segment_header_t; + MEMORY_PRESSURE_NO_PRESSURE, + MEMORY_PRESSURE_LOW_PRESSURE, + MEMORY_PRESSURE_HIGH_PRESSURE, + MEMORY_PRESSURE_NO_MEMORY, +} fifo_segment_mem_status_t; +#endif typedef struct { @@ -66,7 +73,7 @@ typedef struct 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; @@ -156,25 +163,53 @@ 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 @@ -186,7 +221,7 @@ int fifo_segment_collect_fifo_chunks (fifo_segment_t * fs, svm_fifo_t * f); * @param fs fifo segment * @return free bytes estimate */ -u32 fifo_segment_free_bytes (fifo_segment_t * fs); +uword fifo_segment_free_bytes (fifo_segment_t * fs); /** * Update fifo segment free bytes estimate @@ -198,6 +233,18 @@ u32 fifo_segment_free_bytes (fifo_segment_t * fs); */ 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 * @@ -219,6 +266,11 @@ u32 fifo_segment_num_free_fifos (fifo_segment_t * fs); */ 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);