August 8, 201213 yr So this is a weird one. I recently acquired an Intel PWLA8391GT PRO/1000 GT PCI Network Adapter and put it into a free ASrock 880 PCI slot after disabling the onboard NIC running 4.7 Pro. Strange things: For the first 5 mins, the fastest read speed is 10 MB/s - like it's stuck at 100mbs line speed. Odd thing - exact same file to same disk share - write speed is ~40 MB/s immediately upon startup. After about 5 mins, the read speed increases to ~ 30 MB/s and the write speed increases to ~46 MB/s. Previously with my Realtek onboard, the read and write speeds were both ~32 MB/s. Color me stumped. This same behavior is exhibited by three Win7 and a one Linux box on a wired network. I'm thrilled by the increase in write speed, but how are my reads significantly slower? Any ideas for tuning or why there is a 5 min delay in increased read speed after a restart? Thanks for the help! =========== root@tower:~# ifconfig eth0 Link encap:Ethernet HWaddr 00:0e:04:b7:8a:00 inet addr:192.168.1.200 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:3527410 errors:686 dropped:0 overruns:0 frame:377 TX packets:5811596 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:4046295806 (3.7 GiB) TX bytes:2944016799 (2.7 GiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:58 errors:0 dropped:0 overruns:0 frame:0 TX packets:58 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:8198 (8.0 KiB) TX bytes:8198 (8.0 KiB) root@Tower:~# ethtool eth0 Settings for eth0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised auto-negotiation: Yes Speed: 1000Mb/s Duplex: Full Port: Twisted Pair PHYAD: 0 Transceiver: internal Auto-negotiation: on Supports Wake-on: umbg Wake-on: g Current message level: 0x00000007 (7) Link detected: yes syslog-2012-08-08.txt
August 10, 201213 yr Author Some more info: Looks like something strange is going on. Using iperf server (tower) from a win client, transfer jumps all over: C:\Apps2\iperf>iperf -c tower -P 1 -i 1 -p 5001 -f M -t 20 -T 1 ------------------------------------------------------------ Client connecting to 192.168.1.200, TCP port 5001 TCP window size: 0.06 MByte (default) ------------------------------------------------------------ [ 3] local 192.168.1.14 port 57738 connected with 192.168.1.200 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 43.2 MBytes 43.2 MBytes/sec [ 3] 1.0- 2.0 sec 44.0 MBytes 44.0 MBytes/sec [ 3] 2.0- 3.0 sec 63.0 MBytes 63.0 MBytes/sec [ 3] 3.0- 4.0 sec 44.0 MBytes 44.0 MBytes/sec [ 3] 4.0- 5.0 sec 61.9 MBytes 61.9 MBytes/sec [ 3] 5.0- 6.0 sec 42.9 MBytes 42.9 MBytes/sec [ 3] 6.0- 7.0 sec 43.0 MBytes 43.0 MBytes/sec [ 3] 7.0- 8.0 sec 44.9 MBytes 44.9 MBytes/sec [ 3] 8.0- 9.0 sec 63.0 MBytes 63.0 MBytes/sec [ 3] 9.0-10.0 sec 41.2 MBytes 41.2 MBytes/sec [ 3] 10.0-11.0 sec 42.6 MBytes 42.6 MBytes/sec [ 3] 11.0-12.0 sec 63.0 MBytes 63.0 MBytes/sec ... ================= The Win box as a server and client on unraid: root@Tower:/# iperf -c 192.168.1.14 -P 1 -i 1 -p 5001 -f M -t 20 -T 1 ------------------------------------------------------------ Client connecting to 192.168.1.14, TCP port 5001 TCP window size: 0.06 MByte (default) ------------------------------------------------------------ [ 3] local 192.168.1.200 port 35588 connected with 192.168.1.14 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 66.2 MBytes 66.2 MBytes/sec [ 3] 1.0- 2.0 sec 67.5 MBytes 67.5 MBytes/sec [ 3] 2.0- 3.0 sec 67.9 MBytes 67.9 MBytes/sec [ 3] 3.0- 4.0 sec 67.4 MBytes 67.4 MBytes/sec [ 3] 4.0- 5.0 sec 67.5 MBytes 67.5 MBytes/sec [ 3] 5.0- 6.0 sec 67.5 MBytes 67.5 MBytes/sec [ 3] 6.0- 7.0 sec 67.5 MBytes 67.5 MBytes/sec [ 3] 7.0- 8.0 sec 67.8 MBytes 67.8 MBytes/sec [ 3] 8.0- 9.0 sec 67.5 MBytes 67.5 MBytes/sec [ 3] 9.0-10.0 sec 67.5 MBytes 67.5 MBytes/sec [ 3] 10.0-11.0 sec 67.2 MBytes 67.2 MBytes/sec ... ============= I will try my Realtek NIC tomorrow. Anybody ever seen this from an Intel NIC on an AMD chipset?
August 22, 201213 yr Curious how you made out with this. I'm about to pick up a PWLA8391GTBLK in the next couple of days.
August 22, 201213 yr RX packets:3527410 errors:686 dropped:0 overruns:0 frame:377 There should be no errors and frame should also be zero. This could be NIC, cable, or switch port.
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