From: Jim Baxter Date: Mon, 7 Jul 2014 17:33:18 +0000 (+0100) Subject: usb: gadget: NCM: Add transmit multi-frame. X-Git-Tag: omap-for-v3.17/fixes-against-rc2~164^2~18^2~20 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6d3865f9d41f15ddbcecaa6722871fc0db21d7ab;p=pandora-kernel.git usb: gadget: NCM: Add transmit multi-frame. This adds multi-frame support to the NCM NTB's for the gadget driver. This allows multiple network packets to be put inside a single USB NTB with a maximum size of 16kB. It has a time out of 300ms to ensure that smaller number of packets still maintain a normal latency. Also the .fp_index and .next_fp_index have been changed to .ndp_index and .next_ndp_index to match the latest CDC-NCM specification and help with maintenance. Results transmitting from gadget to host. Before the change: TCP_STREAM Throughput (10^6bits/sec): 22.72 UDP_STREAM Throughput (10^6bits/sec): 25.94 Latency: netperf -H 192.168.1.101 -v2 -l 50 -t TCP_RR -- -r 16384,16384 Trans. RoundTrip Throughput Rate Latency 10^6bits/s per sec usec/Tran Outbound 100.83 9918.116 13.215 After the change: TCP_STREAM Throughput (10^6bits/sec): 124.26 UDP_STREAM Throughput (10^6bits/sec): 227.48 Latency: netperf -H 192.168.1.101 -v2 -l 50 -t TCP_RR -- -r 16384,16384 Trans. RoundTrip Throughput Rate Latency 10^6bits/s per sec usec/Tran Outbound 156.80 6377.730 20.552 Signed-off-by: Jim Baxter Signed-off-by: Felipe Balbi --- Reading git-diff-tree failed