From 9845c20d77ce8e9e66c9a7693c6841cc971bd423 Mon Sep 17 00:00:00 2001 From: Florin Coras Date: Tue, 28 Apr 2020 01:54:22 +0000 Subject: session: add option to preallocate fifo headers Type: feature Signed-off-by: Florin Coras Change-Id: Ie47546ef36590b90ed481b14cf812afbecf7981c --- src/vnet/session/segment_manager.c | 71 +++++++++++++++++++++----------------- 1 file changed, 39 insertions(+), 32 deletions(-) (limited to 'src/vnet/session/segment_manager.c') diff --git a/src/vnet/session/segment_manager.c b/src/vnet/session/segment_manager.c index 33ce6e58398..7734a3eef81 100644 --- a/src/vnet/session/segment_manager.c +++ b/src/vnet/session/segment_manager.c @@ -262,14 +262,6 @@ segment_manager_segment_handle (segment_manager_t * sm, return (((u64) segment_manager_index (sm) << 32) | segment_index); } -static void -segment_manager_parse_segment_handle (u64 segment_handle, u32 * sm_index, - u32 * segment_index) -{ - *sm_index = segment_handle >> 32; - *segment_index = segment_handle & 0xFFFFFFFF; -} - u64 segment_manager_make_segment_handle (u32 segment_manager_index, u32 segment_index) @@ -341,20 +333,14 @@ segment_manager_alloc (void) int segment_manager_init (segment_manager_t * sm) { - u32 rx_fifo_size, tx_fifo_size, pair_size; - u32 rx_rounded_data_size, tx_rounded_data_size; - uword first_seg_size; - u32 prealloc_fifo_pairs; - u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10); segment_manager_props_t *props; - fifo_segment_t *segment; - u32 approx_segment_count; - int seg_index, i; + uword first_seg_size; + fifo_segment_t *fs; + int fs_index, i; props = segment_manager_properties_get (sm); first_seg_size = clib_max (props->segment_size, sm_main.default_segment_size); - prealloc_fifo_pairs = props->prealloc_fifos; sm->max_fifo_size = props->max_fifo_size ? props->max_fifo_size : sm_main.default_max_fifo_size; @@ -364,8 +350,14 @@ segment_manager_init (segment_manager_t * sm) props->high_watermark, props->low_watermark); - if (prealloc_fifo_pairs) + if (props->prealloc_fifos) { + u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10); + u32 rx_rounded_data_size, tx_rounded_data_size; + u32 prealloc_fifo_pairs = props->prealloc_fifos; + u32 rx_fifo_size, tx_fifo_size, pair_size; + u32 approx_segment_count; + /* Figure out how many segments should be preallocated */ rx_rounded_data_size = (1 << (max_log2 (props->rx_fifo_size))); tx_rounded_data_size = (1 << (max_log2 (props->tx_fifo_size))); @@ -383,36 +375,51 @@ segment_manager_init (segment_manager_t * sm) /* Allocate the segments */ for (i = 0; i < approx_segment_count + 1; i++) { - seg_index = segment_manager_add_segment (sm, max_seg_size); - if (seg_index < 0) + fs_index = segment_manager_add_segment (sm, max_seg_size); + if (fs_index < 0) { clib_warning ("Failed to preallocate segment %d", i); - return seg_index; + return fs_index; } - segment = segment_manager_get_segment (sm, seg_index); + fs = segment_manager_get_segment (sm, fs_index); if (i == 0) - sm->event_queue = segment_manager_alloc_queue (segment, props); + sm->event_queue = segment_manager_alloc_queue (fs, props); - fifo_segment_preallocate_fifo_pairs (segment, + fifo_segment_preallocate_fifo_pairs (fs, props->rx_fifo_size, props->tx_fifo_size, &prealloc_fifo_pairs); - fifo_segment_flags (segment) = FIFO_SEGMENT_F_IS_PREALLOCATED; + fifo_segment_flags (fs) = FIFO_SEGMENT_F_IS_PREALLOCATED; if (prealloc_fifo_pairs == 0) break; } + return 0; } - else + + fs_index = segment_manager_add_segment (sm, first_seg_size); + if (fs_index < 0) + { + clib_warning ("Failed to allocate segment"); + return fs_index; + } + + fs = segment_manager_get_segment (sm, fs_index); + sm->event_queue = segment_manager_alloc_queue (fs, props); + + if (props->prealloc_fifo_hdrs) { - seg_index = segment_manager_add_segment (sm, first_seg_size); - if (seg_index < 0) + u32 hdrs_per_slice; + + /* Do not preallocate on slice associated to main thread */ + i = (vlib_num_workers ()? 1 : 0); + hdrs_per_slice = props->prealloc_fifo_hdrs / (fs->n_slices - i); + + for (; i < fs->n_slices; i++) { - clib_warning ("Failed to allocate segment"); - return seg_index; + if (fifo_segment_prealloc_fifo_hdrs (fs, i, hdrs_per_slice)) + return VNET_API_ERROR_SVM_SEGMENT_CREATE_FAIL; } - segment = segment_manager_get_segment (sm, seg_index); - sm->event_queue = segment_manager_alloc_queue (segment, props); } return 0; -- cgit 1.2.3-korg