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Date: Thu, 15 May 2014 15:28:24 +0900 From: カオ ミン ヒェップ <cm-hiep@...so.co.jp> To: Sergei Shtylyov <sergei.shtylyov@...entembedded.com> CC: netdev@...r.kernel.org, linux-sh@...r.kernel.org, Magnus Damm <magnus.damm@...il.com>, Simon Horman <horms@...ge.net.au> Subject: Ethernet bug at Upstream-v3.15-rcx on Lager. Hi Sergei I am Hiep from JINZAI SOLUTION (a Japanese Company). Now, I am testing a upstream-v3.15-rc2 on Lager for Renesas RSO. I found a problem about Ethernet Driver so I would like to report to you. The problem is losing data when sending data by UDP: - From Lager board to PC: BANDWIDTH from 10M to 70M are good, but they suddenly down 51.2 Mbits/sec at 80M and 57.8 Mbits/sec at 90 M and 64.2 Mbits/sec at 100M. - From PC to Lager board: Some time when the message of "sh-eth r8a7790-ether eth0: Receive FIFO Overflow" occurs, some of datagrams will be lost as the logs show below: 「$ iperf -c 172.16.1.36 -u -b 90M ..... [ 3] Server Report: [ 3] 0.0-10.0 sec 108 MBytes 90.4 Mbits/sec 0.000 ms 36/76923 (0.047%) ..... # iperf -s -u [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams sh-eth r8a7790-ether eth0: Receive FIFO Overflow [ 3] 0.0-10.0 sec 108 MBytes 90.4 Mbits/sec 0.001 ms 36/76923 (0.047%) Please review it when you have time. Bests Regards, Cao Minh Hiep. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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