diff options
| author |   Florin Coras <fcoras@cisco.com> | 2017-05-24 18:03:56 -0700 |
|---|---|---|
| committer |   Dave Barach <openvpp@barachs.net> | 2017-06-09 16:47:19 +0000 |
| commit | 93992a9048cb6e5dcd22de5091e72de778122627 (patch) | |
| tree | f295bb870ad1614d9327828dd036fb03f60e455e /src/svm/svm_fifo.c | |
| parent | 583dc8d3e23a780c85ebe48ea59f0338aad4df17 (diff) | |
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 <fcoras@cisco.com>
Signed-off-by: Dave Barach <dbarach@cisco.com>
Diffstat (limited to 'src/svm/svm_fifo.c')
| -rw-r--r-- | src/svm/svm_fifo.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/svm/svm_fifo.c b/src/svm/svm_fifo.c index f13f6feae1a..5c8f244ad2c 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)) { |