From 93992a9048cb6e5dcd22de5091e72de778122627 Mon Sep 17 00:00:00 2001 From: Florin Coras Date: Wed, 24 May 2017 18:03:56 -0700 Subject: Implement sack based tcp loss recovery (RFC 6675) - refactor existing congestion control code (RFC 6582/5681). Handling of ack feedback now consists of: ack parsing, cc event detection, event handling, congestion control update - extend sack scoreboard to support sack based retransmissions - basic implementation of Eifel detection algorithm (RFC 3522) for detecting spurious retransmissions - actually initialize the per-thread frame freelist hash tables - increase worker stack size to 2mb - fix session queue node out-of-buffer handling - ensure that the local buffer cache vec_len matches reality - avoid 2x spurious event requeues when short of buffers - count out-of-buffer events - make the builtin server thread-safe - fix bihash template threading issue: need to paint -1 across uninitialized working_copy_length vector elements (via rebase from master) Change-Id: I646cb9f1add9a67d08f4a87badbcb117980ebfc4 Signed-off-by: Florin Coras Signed-off-by: Dave Barach --- src/svm/svm_fifo.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'src/svm') diff --git a/src/svm/svm_fifo.c b/src/svm/svm_fifo.c index f13f6fea..5c8f244a 100644 --- a/src/svm/svm_fifo.c +++ b/src/svm/svm_fifo.c @@ -540,7 +540,7 @@ svm_fifo_peek (svm_fifo_t * f, u32 relative_offset, u32 max_bytes, /* read cursize, which can only increase while we're working */ cursize = svm_fifo_max_dequeue (f); - if (PREDICT_FALSE (cursize == 0)) + if (PREDICT_FALSE (cursize < relative_offset)) return -2; /* nothing in the fifo */ nitems = f->nitems; @@ -548,7 +548,8 @@ svm_fifo_peek (svm_fifo_t * f, u32 relative_offset, u32 max_bytes, real_head = real_head >= nitems ? real_head - nitems : real_head; /* Number of bytes we're going to copy */ - total_copy_bytes = (cursize < max_bytes) ? cursize : max_bytes; + total_copy_bytes = (cursize - relative_offset < max_bytes) ? + cursize - relative_offset : max_bytes; if (PREDICT_TRUE (copy_here != 0)) { -- cgit 1.2.3-korg