From: カオ ミン ヒェップ <cm-hiep@jinso•co.jp>
To: Sergei Shtylyov <sergei.shtylyov@cogentembedded•com>
Cc: netdev@vger•kernel.org, linux-sh@vger•kernel.org,
Magnus Damm <magnus.damm@gmail•com>,
Simon Horman <horms@verge•net.au>
Subject: Ethernet bug at Upstream-v3.15-rcx on Lager.
Date: Thu, 15 May 2014 15:28:24 +0900 [thread overview]
Message-ID: <53745E88.7040108@jinso.co.jp> (raw)
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.
next reply other threads:[~2014-05-15 6:35 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-15 6:28 カオ ミン ヒェップ [this message]
2014-05-15 17:20 ` Ethernet bug at Upstream-v3.15-rcx on Lager Sergei Shtylyov
2014-05-16 1:08 ` カオ ミン ヒェップ
2014-05-16 5:56 ` Yoshihiro Shimoda
2014-05-30 14:04 ` Ben Dooks
2014-06-03 2:43 ` Yoshihiro Shimoda
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