X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fsvm%2Ffifo_segment.h;h=ec184207269569d1ed825916f91616a0e88debd4;hb=f3ee2b636ad3b12e7484ec6fb13f220699417046;hp=85548063972614283c4f196263cada62a148eb4d;hpb=f22f4e562e1b922cff036ef628b77fd2d479d015;p=vpp.git diff --git a/src/svm/fifo_segment.h b/src/svm/fifo_segment.h index 85548063972..ec184207269 100644 --- a/src/svm/fifo_segment.h +++ b/src/svm/fifo_segment.h @@ -17,8 +17,11 @@ #include #include +#include #include +#define FIFO_SEGMENT_ALLOC_OVERHEAD (2 * clib_mem_get_page_size ()) + typedef enum { FIFO_SEGMENT_FTYPE_NONE = -1, @@ -29,7 +32,7 @@ typedef enum #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_MAX_FIFO_SIZE (2ULL << 30) /**< 2GB max fifo size */ #define FIFO_SEGMENT_ALLOC_BATCH_SIZE 32 /* Allocation quantum */ typedef enum fifo_segment_flags_ @@ -37,13 +40,46 @@ 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_F_CUSTOM_USE = 1 << 3, } fifo_segment_flags_t; +#define foreach_segment_mem_status \ +_(NO_PRESSURE, "No pressure") \ +_(LOW_PRESSURE, "Low pressure") \ +_(HIGH_PRESSURE, "High pressure") \ +_(NO_MEMORY, "No memory") + +typedef enum +{ +#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 */ + fifo_slice_private_t *slices; /**< private slice information */ + svm_msg_q_t *mqs; /**< private vec of attached mqs */ + uword max_byte_index; /**< max byte index for segment */ + u32 sm_index; /**< owner segment manager index */ + u32 fs_index; /**< fs index in sm pool */ u8 n_slices; /**< number of fifo segment slices */ + u8 flags; /**< private fifo segment flags */ + u8 high_watermark; /**< memory pressure watermark high */ + u8 low_watermark; /**< memory pressure watermark low */ } fifo_segment_t; typedef struct @@ -62,7 +98,7 @@ typedef struct u32 *new_segment_indices; /**< return vec of new seg indices */ } fifo_segment_create_args_t; -#define fifo_segment_flags(_fs) _fs->h->flags +#define fifo_segment_flags(_fs) _fs->flags int fifo_segment_init (fifo_segment_t * fs); int fifo_segment_create (fifo_segment_main_t * sm, @@ -70,11 +106,26 @@ int fifo_segment_create (fifo_segment_main_t * sm, int fifo_segment_attach (fifo_segment_main_t * sm, fifo_segment_create_args_t * a); void fifo_segment_delete (fifo_segment_main_t * sm, fifo_segment_t * fs); +void fifo_segment_cleanup (fifo_segment_t *fs); fifo_segment_t *fifo_segment_get_segment (fifo_segment_main_t * sm, u32 fs_index); +fifo_segment_t *fifo_segment_get_segment_if_valid (fifo_segment_main_t *sm, + u32 segment_index); u32 fifo_segment_index (fifo_segment_main_t * sm, fifo_segment_t * fs); void fifo_segment_info (fifo_segment_t * seg, char **address, size_t * size); +always_inline void * +fifo_segment_ptr (fifo_segment_t *fs, uword offset) +{ + return (void *) ((u8 *) fs->h + offset); +} + +always_inline uword +fifo_segment_offset (fifo_segment_t *fs, void *p) +{ + return (uword) ((u8 *) p - (u8 *) fs->h); +} + /** * Allocate fifo in fifo segment * @@ -87,6 +138,9 @@ svm_fifo_t *fifo_segment_alloc_fifo_w_slice (fifo_segment_t * fs, u32 slice_index, u32 data_bytes, fifo_segment_ftype_t ftype); +svm_fifo_t *fifo_segment_alloc_fifo_w_offset (fifo_segment_t *fs, + uword offset); +svm_fifo_t *fifo_segment_duplicate_fifo (fifo_segment_t *fs, svm_fifo_t *f); /** * Free fifo allocated in fifo segment @@ -96,6 +150,59 @@ svm_fifo_t *fifo_segment_alloc_fifo_w_slice (fifo_segment_t * fs, */ void fifo_segment_free_fifo (fifo_segment_t * fs, svm_fifo_t * f); +/** + * Free fifo allocated by external applications + * + * @params fs fifo segment for fifo + * @param f fifo to be freed + */ +void fifo_segment_free_client_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); +uword fifo_segment_fifo_offset (svm_fifo_t *f); + +/** + * Allocate message queue on segment + * + * @param fs fifo segment for mq + * @param mq_index index in private mqs vector to use to attach + * @param cfg configuration for mq + * @return attached message queue + */ +svm_msg_q_t *fifo_segment_msg_q_alloc (fifo_segment_t *fs, u32 mq_index, + svm_msg_q_cfg_t *cfg); + +/** + * Attach message queue at fifo segment offset + * + * @param fs fifo segment for mq + * @param offset offset for shared mq on the segment + * @param mq_index index in private mqs vector to use to attach + * @return attached message queue + */ +svm_msg_q_t *fifo_segment_msg_q_attach (fifo_segment_t *fs, uword offset, + u32 mq_index); + +/** + * Discover mqs on mq only segment + * + * @param fs fifo segment for mq + * @param fds array of fds is mqs use eventfds + * @param n_fds number of fds + */ +void fifo_segment_msg_qs_discover (fifo_segment_t *fs, int *fds, u32 n_fds); + +/** + * Message queue offset on segment + * + * @param fs fifo segment for mq + * @param mq_index index of mq in private mqs vector + * @return offset of the shared mq the private mq is attached to + */ +uword fifo_segment_msg_q_offset (fifo_segment_t *fs, u32 mq_index); + /** * Try to preallocate fifo headers * @@ -140,11 +247,45 @@ void fifo_segment_preallocate_fifo_pairs (fifo_segment_t * fs, u32 tx_fifo_size, u32 * n_fifo_pairs); +/** + * Allocate chunks in fifo segment + * + * @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. + */ svm_fifo_chunk_t *fsh_alloc_chunk (fifo_segment_header_t * fsh, u32 slice_index, u32 chunk_size); +/** + * Return chunks to fifo segment + * + * @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 * cur); + svm_fifo_chunk_t * c); + +/** + * Fifo segment reset mem limit flag + * + * @param fs fifo segment + * @param size size requested + * @return pointer to memory allocated or 0 + */ +void *fifo_segment_alloc (fifo_segment_t *fs, uword size); +/** + * 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 @@ -159,14 +300,16 @@ void fsh_collect_chunks (fifo_segment_header_t * fsh, u32 slice_index, uword fifo_segment_free_bytes (fifo_segment_t * fs); /** - * Update fifo segment free bytes estimate + * Fifo segment number of cached bytes * - * Forces fifo segment free bytes estimate synchronization with underlying - * memory allocator. + * Returns fifo segment's number of cached bytes. * - * @param fs fifo segment + * @param fs fifo segment + * @return cached bytes */ -void fifo_segment_update_free_bytes (fifo_segment_t * fs); +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 @@ -180,6 +323,14 @@ 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); + +svm_fifo_chunk_t *fifo_segment_alloc_chunk_w_slice (fifo_segment_t *fs, + u32 slice_index, + u32 chunk_size); +void fifo_segment_collect_chunk (fifo_segment_t *fs, u32 slice_index, + svm_fifo_chunk_t *c); +uword fifo_segment_chunk_offset (fifo_segment_t *fs, svm_fifo_chunk_t *c); + /** * Find number of free chunks of given size * @@ -189,6 +340,9 @@ 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_get_mem_status (fifo_segment_t * fs); + void fifo_segment_main_init (fifo_segment_main_t * sm, u64 baseva, u32 timeout_in_seconds);