From: Rahul on 17 Dec 2009 16:41 I have a situation where I am getting a lot of TxPause Frames. Is this a cause for worry? What is typically likely to cause this? At the same time I also see many retransmissions in: cat /sys/class/infiniband/cxgb3_0/proto_stats/tcpRetransSegs 491998 Just curious whether this is "normal" or a cause for worry? And what's a good strategy to debug: Switch, OS or eth adapters? ethtool -S eth0 NIC statistics: TxOctetsOK : 26828096802 TxFramesOK : 31372373 TxMulticastFramesOK: 6 TxBroadcastFramesOK: 15 TxPauseFrames : 46604 TxUnderrun : 0 TxExtUnderrun : 0 TxFrames64 : 545 TxFrames65To127 : 17386957 TxFrames128To255 : 226439 TxFrames256To511 : 13197 TxFrames512To1023 : 4782225 TxFrames1024To1518 : 7593352 TxFrames1519ToMax : 1369658 RxOctetsOK : 33633096611 RxFramesOK : 34323200 RxMulticastFramesOK: 0 RxBroadcastFramesOK: 60 RxPauseFrames : 0 RxFCSErrors : 0 RxSymbolErrors : 0 RxShortErrors : 0 RxJabberErrors : 0 RxLengthErrors : 0 RxFIFOoverflow : 0 RxFrames64 : 439 RxFrames65To127 : 15628843 RxFrames128To255 : 230941 RxFrames256To511 : 17683 RxFrames512To1023 : 4786452 RxFrames1024To1518 : 12230327 RxFrames1519ToMax : 1428515 PhyFIFOErrors : 0 TSO : 5 VLANextractions : 0 VLANinsertions : 0 TxCsumOffload : 245348 RxCsumGood : 3380530 RxDrops : 0 CheckTXEnToggled : 0 CheckResets : 0 LinkFaults : 0 -- Rahul
From: lupin492 on 21 Dec 2009 21:42 On Dec 17, 6:41 pm, Rahul <nos...(a)nospam.invalid> wrote: > I have a situation where I am getting a lot of TxPause Frames. Is this a > cause for worry? What is typically likely to cause this? At the same time > I also see many retransmissions in: > > cat /sys/class/infiniband/cxgb3_0/proto_stats/tcpRetransSegs > 491998 > > Just curious whether this is "normal" or a cause for worry? And what's a > good strategy to debug: Switch, OS or eth adapters? > > ethtool -S eth0 > NIC statistics: > TxOctetsOK : 26828096802 > TxFramesOK : 31372373 > TxMulticastFramesOK: 6 > TxBroadcastFramesOK: 15 > TxPauseFrames : 46604 > TxUnderrun : 0 > TxExtUnderrun : 0http://www.techfest.com/networking/lan/ethernet3.htm > TxFrames64 : 545 > TxFrames65To127 : 17386957 > TxFrames128To255 : 226439 > TxFrames256To511 : 13197 > TxFrames512To1023 : 4782225 > TxFrames1024To1518 : 7593352 > TxFrames1519ToMax : 1369658 > RxOctetsOK : 33633096611 > RxFramesOK : 34323200 > RxMulticastFramesOK: 0 > RxBroadcastFramesOK: 60 > RxPauseFrames : 0 > RxFCSErrors : 0 > RxSymbolErrors : 0 > RxShortErrors : 0 > RxJabberErrors : 0 > RxLengthErrors : 0 > RxFIFOoverflow : 0 > RxFrames64 : 439 > RxFrames65To127 : 15628843 > RxFrames128To255 : 230941 > RxFrames256To511 : 17683 > RxFrames512To1023 : 4786452 > RxFrames1024To1518 : 12230327 > RxFrames1519ToMax : 1428515 > PhyFIFOErrors : 0 > TSO : 5 > VLANextractions : 0 > VLANinsertions : 0 > TxCsumOffload : 245348 > RxCsumGood : 3380530 > RxDrops : 0 > CheckTXEnToggled : 0 > CheckResets : 0 > LinkFaults : 0 > > -- > Rahul Hi! I found an article explaining what are these frames (see section 3.2.1 at http://www.techfest.com/networking/lan/ethernet3.htm ), but I'm sorry I cannot help you more to debug the problem. I just can suspect your PC is getting too busy to accept all the frames it receives from the NIC. Regards,
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