diff options
Diffstat (limited to 'libglusterfs/src')
| -rw-r--r-- | libglusterfs/src/iobuf.c | 261 | ||||
| -rw-r--r-- | libglusterfs/src/iobuf.h | 7 |
2 files changed, 163 insertions, 105 deletions
diff --git a/libglusterfs/src/iobuf.c b/libglusterfs/src/iobuf.c index f29ce93c31e..e02d1e16559 100644 --- a/libglusterfs/src/iobuf.c +++ b/libglusterfs/src/iobuf.c @@ -27,11 +27,59 @@ TODO: implement destroy margins and prefetching of arenas */ +#define IOBUF_ARENA_MAX_INDEX (sizeof (gf_iobuf_init_config) / \ + (sizeof (struct iobuf_init_config))) + +/* Make sure this array is sorted based on pagesize */ +struct iobuf_init_config gf_iobuf_init_config[] = { + /* { pagesize, num_pages }, */ + {128, 1024}, + {512, 512}, + {2 * 1024, 512}, + {8 * 1024, 128}, + {32 * 1024, 64}, + {128 * 1024, 32}, + {256 * 1024, 8}, + {1 * 1024 * 1024, 2}, +}; + +int +gf_iobuf_get_arena_index (size_t page_size) +{ + int i = -1; + + for (i = 0; i < IOBUF_ARENA_MAX_INDEX; i++) { + if (page_size <= gf_iobuf_init_config[i].pagesize) + break; + } + + if (i >= IOBUF_ARENA_MAX_INDEX) + i = -1; + + return i; +} + +size_t +gf_iobuf_get_pagesize (size_t page_size) +{ + int i = 0; + size_t size = 0; + + for (i = 0; i < IOBUF_ARENA_MAX_INDEX; i++) { + size = gf_iobuf_init_config[i].pagesize; + if (page_size <= size) + break; + } + + if (i >= IOBUF_ARENA_MAX_INDEX) + size = -1; + + return size; +} + void __iobuf_arena_init_iobufs (struct iobuf_arena *iobuf_arena) { - size_t arena_size = 0; - size_t page_size = 0; int iobuf_cnt = 0; struct iobuf *iobuf = NULL; int offset = 0; @@ -39,9 +87,7 @@ __iobuf_arena_init_iobufs (struct iobuf_arena *iobuf_arena) GF_VALIDATE_OR_GOTO ("iobuf", iobuf_arena, out); - arena_size = iobuf_arena->arena_size; - page_size = iobuf_arena->page_size; - iobuf_cnt = arena_size / page_size; + iobuf_cnt = iobuf_arena->page_count; iobuf_arena->iobufs = GF_CALLOC (sizeof (*iobuf), iobuf_cnt, gf_common_mt_iobuf); @@ -60,7 +106,7 @@ __iobuf_arena_init_iobufs (struct iobuf_arena *iobuf_arena) list_add (&iobuf->list, &iobuf_arena->passive.list); iobuf_arena->passive_cnt++; - offset += page_size; + offset += iobuf_arena->page_size; iobuf++; } @@ -72,20 +118,16 @@ out: void __iobuf_arena_destroy_iobufs (struct iobuf_arena *iobuf_arena) { - size_t arena_size = 0; - size_t page_size = 0; int iobuf_cnt = 0; struct iobuf *iobuf = NULL; int i = 0; GF_VALIDATE_OR_GOTO ("iobuf", iobuf_arena, out); - arena_size = iobuf_arena->arena_size; - page_size = iobuf_arena->page_size; - iobuf_cnt = arena_size / page_size; + iobuf_cnt = iobuf_arena->page_count; if (!iobuf_arena->iobufs) { - gf_log_callingfn (THIS->name, GF_LOG_DEBUG, "iobufs not found"); + gf_log_callingfn (THIS->name, GF_LOG_ERROR, "iobufs not found"); return; } @@ -107,17 +149,13 @@ out: void __iobuf_arena_destroy (struct iobuf_arena *iobuf_arena) { - struct iobuf_pool *iobuf_pool = NULL; - GF_VALIDATE_OR_GOTO ("iobuf", iobuf_arena, out); - iobuf_pool = iobuf_arena->iobuf_pool; - __iobuf_arena_destroy_iobufs (iobuf_arena); if (iobuf_arena->mem_base && iobuf_arena->mem_base != MAP_FAILED) - munmap (iobuf_arena->mem_base, iobuf_pool->arena_size); + munmap (iobuf_arena->mem_base, iobuf_arena->arena_size); GF_FREE (iobuf_arena); out: @@ -126,10 +164,11 @@ out: struct iobuf_arena * -__iobuf_arena_alloc (struct iobuf_pool *iobuf_pool, size_t page_size) +__iobuf_arena_alloc (struct iobuf_pool *iobuf_pool, size_t page_size, + int32_t num_iobufs) { struct iobuf_arena *iobuf_arena = NULL; - size_t arena_size = 0, rounded_size = 0; + size_t rounded_size = 0; GF_VALIDATE_OR_GOTO ("iobuf", iobuf_pool, out); @@ -143,18 +182,15 @@ __iobuf_arena_alloc (struct iobuf_pool *iobuf_pool, size_t page_size) INIT_LIST_HEAD (&iobuf_arena->passive.list); iobuf_arena->iobuf_pool = iobuf_pool; - arena_size = iobuf_pool->arena_size; - - rounded_size = gf_roundup_power_of_two (page_size); - iobuf_arena->page_size = rounded_size; + rounded_size = gf_iobuf_get_pagesize (page_size); - if ((arena_size % rounded_size) != 0) { - arena_size = (arena_size / rounded_size) * rounded_size; - } + iobuf_arena->page_size = rounded_size; + iobuf_arena->page_count = num_iobufs; - iobuf_arena->arena_size = arena_size; + iobuf_arena->arena_size = rounded_size * num_iobufs; - iobuf_arena->mem_base = mmap (NULL, arena_size, PROT_READ|PROT_WRITE, + iobuf_arena->mem_base = mmap (NULL, iobuf_arena->arena_size, + PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); if (iobuf_arena->mem_base == MAP_FAILED) { gf_log (THIS->name, GF_LOG_WARNING, "maping failed"); @@ -163,7 +199,7 @@ __iobuf_arena_alloc (struct iobuf_pool *iobuf_pool, size_t page_size) __iobuf_arena_init_iobufs (iobuf_arena); if (!iobuf_arena->iobufs) { - gf_log (THIS->name, GF_LOG_DEBUG, "init failed"); + gf_log (THIS->name, GF_LOG_ERROR, "init failed"); goto err; } @@ -188,12 +224,11 @@ __iobuf_arena_unprune (struct iobuf_pool *iobuf_pool, size_t page_size) GF_VALIDATE_OR_GOTO ("iobuf", iobuf_pool, out); - index = log_base2 (page_size); - if (index > GF_VARIABLE_IOBUF_COUNT) { - gf_log ("iobuf", GF_LOG_DEBUG, "no arena corresponding to " - "page_size (%"GF_PRI_SIZET") is present. max supported " - "size (%llu)", page_size, - 1LL << GF_VARIABLE_IOBUF_COUNT); + index = gf_iobuf_get_arena_index (page_size); + if (index == -1) { + gf_log ("iobuf", GF_LOG_ERROR, "page_size (%zu) of " + "iobufs in arena being added is greater than max " + "available", page_size); return NULL; } @@ -208,27 +243,25 @@ out: struct iobuf_arena * -__iobuf_pool_add_arena (struct iobuf_pool *iobuf_pool, size_t page_size) +__iobuf_pool_add_arena (struct iobuf_pool *iobuf_pool, size_t page_size, + int32_t num_pages) { struct iobuf_arena *iobuf_arena = NULL; int index = 0; - uint32_t rounded_size = 0; - - rounded_size = gf_roundup_power_of_two (page_size); - index = log_base2 (rounded_size); - if (index > GF_VARIABLE_IOBUF_COUNT) { - gf_log ("iobuf", GF_LOG_DEBUG, "page_size %u of " + index = gf_iobuf_get_arena_index (page_size); + if (index == -1) { + gf_log ("iobuf", GF_LOG_ERROR, "page_size (%zu) of " "iobufs in arena being added is greater than max " - "supported size (%llu)", rounded_size, - 1ULL << GF_VARIABLE_IOBUF_COUNT); + "available", page_size); return NULL; } - iobuf_arena = __iobuf_arena_unprune (iobuf_pool, rounded_size); + iobuf_arena = __iobuf_arena_unprune (iobuf_pool, page_size); if (!iobuf_arena) - iobuf_arena = __iobuf_arena_alloc (iobuf_pool, rounded_size); + iobuf_arena = __iobuf_arena_alloc (iobuf_pool, page_size, + num_pages); if (!iobuf_arena) { gf_log (THIS->name, GF_LOG_WARNING, "arena not found"); @@ -242,7 +275,8 @@ __iobuf_pool_add_arena (struct iobuf_pool *iobuf_pool, size_t page_size) struct iobuf_arena * -iobuf_pool_add_arena (struct iobuf_pool *iobuf_pool, size_t page_size) +iobuf_pool_add_arena (struct iobuf_pool *iobuf_pool, size_t page_size, + int32_t num_pages) { struct iobuf_arena *iobuf_arena = NULL; @@ -250,7 +284,8 @@ iobuf_pool_add_arena (struct iobuf_pool *iobuf_pool, size_t page_size) pthread_mutex_lock (&iobuf_pool->mutex); { - iobuf_arena = __iobuf_pool_add_arena (iobuf_pool, page_size); + iobuf_arena = __iobuf_pool_add_arena (iobuf_pool, page_size, + num_pages); } pthread_mutex_unlock (&iobuf_pool->mutex); @@ -268,7 +303,7 @@ iobuf_pool_destroy (struct iobuf_pool *iobuf_pool) GF_VALIDATE_OR_GOTO ("iobuf", iobuf_pool, out); - for (i = 0; i < GF_VARIABLE_IOBUF_COUNT; i++) { + for (i = 0; i < IOBUF_ARENA_MAX_INDEX; i++) { list_for_each_entry_safe (iobuf_arena, tmp, &iobuf_pool->arenas[i], list) { list_del_init (&iobuf_arena->list); @@ -284,19 +319,13 @@ out: struct iobuf_pool * -iobuf_pool_new (size_t arena_size, size_t page_size) +iobuf_pool_new (void) { struct iobuf_pool *iobuf_pool = NULL; int i = 0; - unsigned long long max_size = 0; - - max_size = ((1ULL << (GF_VARIABLE_IOBUF_COUNT)) - 1); - if ((arena_size < page_size) || (max_size < arena_size)) { - gf_log (THIS->name, GF_LOG_WARNING, - "arena size (%zu) is less than page size(%zu)", - arena_size, page_size); - goto out; - } + size_t page_size = 0; + size_t arena_size = 0; + int32_t num_pages = 0; iobuf_pool = GF_CALLOC (sizeof (*iobuf_pool), 1, gf_common_mt_iobuf_pool); @@ -304,16 +333,25 @@ iobuf_pool_new (size_t arena_size, size_t page_size) goto out; pthread_mutex_init (&iobuf_pool->mutex, NULL); - for (i = 0; i < GF_VARIABLE_IOBUF_COUNT; i++) { + for (i = 0; i < IOBUF_ARENA_MAX_INDEX; i++) { INIT_LIST_HEAD (&iobuf_pool->arenas[i]); INIT_LIST_HEAD (&iobuf_pool->filled[i]); INIT_LIST_HEAD (&iobuf_pool->purge[i]); } - iobuf_pool->arena_size = arena_size; - iobuf_pool->default_page_size = page_size; + iobuf_pool->default_page_size = 128 * GF_UNIT_KB; + + arena_size = 0; + for (i = 0; i < IOBUF_ARENA_MAX_INDEX; i++) { + page_size = gf_iobuf_init_config[i].pagesize; + num_pages = gf_iobuf_init_config[i].num_pages; + + iobuf_pool_add_arena (iobuf_pool, page_size, num_pages); + + arena_size += page_size * num_pages; + } - iobuf_pool_add_arena (iobuf_pool, page_size); + iobuf_pool->arena_size = arena_size; out: return iobuf_pool; @@ -321,30 +359,24 @@ out: void -__iobuf_pool_prune (struct iobuf_pool *iobuf_pool) +__iobuf_arena_prune (struct iobuf_pool *iobuf_pool, + struct iobuf_arena *iobuf_arena, int index) { - struct iobuf_arena *iobuf_arena = NULL; - struct iobuf_arena *tmp = NULL; - int i = 0; - GF_VALIDATE_OR_GOTO ("iobuf", iobuf_pool, out); - for (i = 0; i < GF_VARIABLE_IOBUF_COUNT; i++) { - if (list_empty (&iobuf_pool->arenas[i])) { - continue; - } - - list_for_each_entry_safe (iobuf_arena, tmp, - &iobuf_pool->purge[i], list) { - if (iobuf_arena->active_cnt) - continue; + /* code flow comes here only if the arena is in purge list and we can + * free the arena only if we have atleast one arena in 'arenas' list + * (ie, at least few iobufs free in arena), that way, there won't + * be spurious mmap/unmap of buffers + */ + if (list_empty (&iobuf_pool->arenas[index])) + goto out; - list_del_init (&iobuf_arena->list); - iobuf_pool->arena_cnt--; + /* All cases matched, destroy */ + list_del_init (&iobuf_arena->list); + iobuf_pool->arena_cnt--; - __iobuf_arena_destroy (iobuf_arena); - } - } + __iobuf_arena_destroy (iobuf_arena); out: return; @@ -354,11 +386,24 @@ out: void iobuf_pool_prune (struct iobuf_pool *iobuf_pool) { + struct iobuf_arena *iobuf_arena = NULL; + struct iobuf_arena *tmp = NULL; + int i = 0; + GF_VALIDATE_OR_GOTO ("iobuf", iobuf_pool, out); pthread_mutex_lock (&iobuf_pool->mutex); { - __iobuf_pool_prune (iobuf_pool); + for (i = 0; i < IOBUF_ARENA_MAX_INDEX; i++) { + if (list_empty (&iobuf_pool->arenas[i])) { + continue; + } + + list_for_each_entry_safe (iobuf_arena, tmp, + &iobuf_pool->purge[i], list) { + __iobuf_arena_prune (iobuf_pool, iobuf_arena, i); + } + } } pthread_mutex_unlock (&iobuf_pool->mutex); @@ -372,18 +417,15 @@ __iobuf_select_arena (struct iobuf_pool *iobuf_pool, size_t page_size) { struct iobuf_arena *iobuf_arena = NULL; struct iobuf_arena *trav = NULL; - size_t rounded_size = 0; int index = 0; GF_VALIDATE_OR_GOTO ("iobuf", iobuf_pool, out); - rounded_size = gf_roundup_power_of_two (page_size); - - index = log_base2 (rounded_size); - if (index > GF_VARIABLE_IOBUF_COUNT) { - gf_log ("iobuf", GF_LOG_DEBUG, "size of iobuf requested (%" - GF_PRI_SIZET") is greater than max supported size (%" - "llu)", rounded_size, 1ULL << GF_VARIABLE_IOBUF_COUNT); + index = gf_iobuf_get_arena_index (page_size); + if (index == -1) { + gf_log ("iobuf", GF_LOG_ERROR, "page_size (%zu) of " + "iobufs in arena being added is greater than max " + "available", page_size); return NULL; } @@ -396,8 +438,9 @@ __iobuf_select_arena (struct iobuf_pool *iobuf_pool, size_t page_size) } if (!iobuf_arena) { - /* all arenas were full */ - iobuf_arena = __iobuf_pool_add_arena (iobuf_pool, rounded_size); + /* all arenas were full, find the right count to add */ + iobuf_arena = __iobuf_pool_add_arena (iobuf_pool, page_size, + gf_iobuf_init_config[index].num_pages); } out: @@ -449,7 +492,14 @@ __iobuf_get (struct iobuf_arena *iobuf_arena, size_t page_size) iobuf_arena->max_active = iobuf_arena->active_cnt; if (iobuf_arena->passive_cnt == 0) { - index = log_base2 (page_size); + index = gf_iobuf_get_arena_index (page_size); + if (index == -1) { + gf_log ("iobuf", GF_LOG_ERROR, "page_size (%zu) of " + "iobufs in arena being added is greater " + "than max available", page_size); + goto out; + } + list_del (&iobuf_arena->list); list_add (&iobuf_arena->list, &iobuf_pool->filled[index]); } @@ -469,7 +519,13 @@ iobuf_get2 (struct iobuf_pool *iobuf_pool, size_t page_size) page_size = iobuf_pool->default_page_size; } - rounded_size = gf_roundup_power_of_two (page_size); + rounded_size = gf_iobuf_get_pagesize (page_size); + if (rounded_size == -1) { + gf_log ("iobuf", GF_LOG_ERROR, "page_size (%zu) of " + "iobufs in arena being requested is greater than max " + "available", page_size); + return NULL; + } pthread_mutex_lock (&iobuf_pool->mutex); { @@ -535,13 +591,11 @@ __iobuf_put (struct iobuf *iobuf, struct iobuf_arena *iobuf_arena) iobuf_pool = iobuf_arena->iobuf_pool; - index = log_base2 (iobuf_arena->page_size); - if (index > GF_VARIABLE_IOBUF_COUNT) { - gf_log ("iobuf", GF_LOG_DEBUG, "size of iobuf being returned to" - " pool(%"GF_PRI_SIZET") is greater than max supported " - "size(%llu) arena = %p", - iobuf_arena->page_size, 1ULL << GF_VARIABLE_IOBUF_COUNT, - iobuf_arena); + index = gf_iobuf_get_arena_index (iobuf_arena->page_size); + if (index == -1) { + gf_log ("iobuf", GF_LOG_ERROR, "page_size (%zu) of " + "iobufs in arena being added is greater than max " + "available", iobuf_arena->page_size); return; } @@ -559,6 +613,7 @@ __iobuf_put (struct iobuf *iobuf, struct iobuf_arena *iobuf_arena) if (iobuf_arena->active_cnt == 0) { list_del (&iobuf_arena->list); list_add_tail (&iobuf_arena->list, &iobuf_pool->purge[index]); + __iobuf_arena_prune (iobuf_pool, iobuf_arena, index); } out: return; @@ -591,8 +646,6 @@ iobuf_put (struct iobuf *iobuf) } pthread_mutex_unlock (&iobuf_pool->mutex); - iobuf_pool_prune (iobuf_pool); - out: return; } diff --git a/libglusterfs/src/iobuf.h b/libglusterfs/src/iobuf.h index efceb2d05b9..d0f86828615 100644 --- a/libglusterfs/src/iobuf.h +++ b/libglusterfs/src/iobuf.h @@ -52,6 +52,10 @@ struct iobuf_arena; /* expandable and contractable pool of memory, internally broken into arenas */ struct iobuf_pool; +struct iobuf_init_config { + size_t pagesize; + int32_t num_pages; +}; struct iobuf { union { @@ -83,6 +87,7 @@ struct iobuf_arena { size_t arena_size; /* this is equal to (iobuf_pool->arena_size / page_size) * page_size */ + size_t page_count; struct iobuf_pool *iobuf_pool; @@ -126,7 +131,7 @@ struct iobuf_pool { }; -struct iobuf_pool *iobuf_pool_new (size_t arena_size, size_t page_size); +struct iobuf_pool *iobuf_pool_new (void); void iobuf_pool_destroy (struct iobuf_pool *iobuf_pool); struct iobuf *iobuf_get (struct iobuf_pool *iobuf_pool); void iobuf_unref (struct iobuf *iobuf); |