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List: samba
Subject: [Samba] 2.6.22/realtek bug in hardware, any kernel work-around?
From: Justin Piszcz <jpiszcz () lucidpixels ! com>
Date: 2007-09-29 18:37:50
Message-ID: Pine.LNX.4.64.0709291434530.8080 () p34 ! internal ! lan
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Package: samba
Version: 3.0.26a-1
>
> Kernel: 2.6.22
>
> samba 3.0.26a-1 performance < 900 KiB/s, but FTP = 30-90 MiB/s
>
> Let me start out by saing this is an oddball problem:
>
> SAMBA:
> LINUX -> WINDOWS = < 900 KiB/s (varies between 100 - 900 KiB/s)
> WINDOWS -> LINUX = 30-90 MiB/s (always)
>
> FTP:
> Either direction, 30-90 MiB/s (always)
>
> I do not see any nasty errors in the logs even with verbose = 5.
>
> Any ideas here? I am not using any special options.
>
> # cat /etc/samba/smb.conf
>
> [global]
> log level = 5
> workgroup = WORKGROUP
> server string = %h - Pentium IV 3.4GHZ
> security = user
> encrypt passwords = true
>
> [user]
> comment = user
> path = /home/user
> writable = yes
> valid users = user
> create mask = 644
>
> --
>
> Here, FTP for pulling files from Linux.
>
> ftp> mget *
> 200 TYPE is now 8-bit binary
> 200 PORT command successful
> 150-Connecting to port 1255
> 150 715924.0 kbytes to download
> 226-File successfully transferred
> 226 13.687 seconds (measured here), 51.08 Mbytes per second
> ftp: 733106176 bytes received in 13.69Seconds 53562.23Kbytes/sec.
> 200 PORT command successful
> 150-Connecting to port 1256
> 150 716272.0 kbytes to download
> 226-File successfully transferred
> 226 13.032 seconds (measured here), 53.67 Mbytes per second
> ftp: 733462528 bytes received in 13.05Seconds 56216.95Kbytes/sec.
> 200 PORT command successful
> 150-Connecting to port 1257
> 150 713200.0 kbytes to download
> 226-File successfully transferred
> 226 12.869 seconds (measured here), 54.12 Mbytes per second
> ftp: 730316800 bytes received in 12.88Seconds 56723.63Kbytes/sec.
>
> Here, FTP for pushing files to Linux.
>
> ftp> mput 1 2 3
> 200 PORT command successful
> 150 Connecting to port 1263
> 226-File successfully transferred
> 226 12.802 seconds (measured here), 54.61 Mbytes per second
> ftp: 733106176 bytes sent in 12.80Seconds 57287.35Kbytes/sec.
> 200 PORT command successful
> 150 Connecting to port 1264
> 226-File successfully transferred
> 226 12.949 seconds (measured here), 54.02 Mbytes per second
> ftp: 733462528 bytes sent in 12.95Seconds 56624.92Kbytes/sec.
> 200 PORT command successful
> 150 Connecting to port 1265
> 226-File successfully transferred
> 226 15.400 seconds (measured here), 45.23 Mbytes per second
> ftp: 730316800 bytes sent in 15.38Seconds 47500.28Kbytes/sec.
>
> But (all I can offer is packet dumps/traces or bandwidth measurements):
>
> Incoming: Outgoing:
> Curr: 0.00 MByte/s Curr: 0.07 MByte/s
> Avg: 0.00 MByte/s Avg: 0.07 MByte/s
> Min: 0.00 MByte/s Min: 0.07 MByte/s
> Max: 0.00 MByte/s Max: 0.07 MByte/s
> Ttl: 1898.08 MByte Ttl: 2954.92 MByte
>
> LOCAL <-> REMOTE TXBPS RXBPS
> TOTALBPS
> (IP) PORT PROTO (IP) PORT TX RX
> TOTAL
> linuxbox <-> p4w.internal.lan 546k/s 4.74k/s 551k/s
> 192.168.0.1 445 TCP 192.168.0.2 1259 6.88m 106k 6.99m
>
> Why do I get such poor performance when trying to retrieve a file off the
> Linux box? This is a very strange problem.
>
> Linux:
>
> $ netstat -i
> Kernel Interface table
> Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR
> Flg
> eth0 1500 0 14049682 0 0 0 11354070 0 0 0
> BMRU
> lo 16436 0 45335 0 0 0 45335 0 0 0
> LRU
>
> Windows:
>
> netstat -s
>
> IPv4 Statistics
>
> Packets Received = 5053597
> Received Header Errors = 0
> Received Address Errors = 19
> Datagrams Forwarded = 0
> Unknown Protocols Received = 0
> Received Packets Discarded = 2
> Received Packets Delivered = 5053595
> Output Requests = 3655144
> Routing Discards = 0
> Discarded Output Packets = 0
> Output Packet No Route = 0
> Reassembly Required = 0
> Reassembly Successful = 0
> Reassembly Failures = 0
> Datagrams Successfully Fragmented = 0
> Datagrams Failing Fragmentation = 3
> Fragments Created = 0
>
> ICMPv4 Statistics
>
> Received Sent
> Messages 47 24
> Errors 0 0
> Destination Unreachable 25 2
> Time Exceeded 0 0
> Parameter Problems 0 0
> Source Quenches 0 0
> Redirects 0 0
> Echos 0 22
> Echo Replies 22 0
> Timestamps 0 0
> Timestamp Replies 0 0
> Address Masks 0 0
> Address Mask Replies 0 0
>
> TCP Statistics for IPv4
>
> Active Opens = 204
> Passive Opens = 14
> Failed Connection Attempts = 16
> Reset Connections = 59
> Current Connections = 3
> Segments Received = 5051709
> Segments Sent = 3654327
> Segments Retransmitted = 76
>
> UDP Statistics for IPv4
>
> Datagrams Received = 1826
> No Ports = 58
> Receive Errors = 3
> Datagrams Sent = 716
>
>
> Justin.
>
> --
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>
Looks like it is hardware related after all:
http://forums.gentoo.org/viewtopic-p-2820556.html
http://ubuntuforums.org/showthread.php?t=531505
http://www.fedoraforum.org/forum/showthread.php?p=452451
One poster wrote "I got similar problems:"
http://forums.gentoo.org/viewtopic-t-570392.html
http://forums.gentoo.org/viewtopic-t-389449-postdays-0-postorder-asc-start-25.html?sid=4251f92bbc6db32fd200c4ea0ea9c9be
I found out that poor smb performance is related to a broken udp-perfomance of the \
8169 NIC in outgoing udp. But, only in Gb Mode of the 8169 NIC, with 100Mbps it is \
ok.
http://forums.gentoo.org/viewtopic-t-570392.html
I have:
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI \
Express Gigabit Ethernet controller (rev 01) 04:00.0 Ethernet controller: Realtek \
Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev \
01)
That must be the issue, time to buy an Intel PCI-e NIC if I want better
performance with samba in Linux.
I do have another one of these motherboards (ABIT AW9D-MAX) running XP and
it does not seem to suffer from this problem, I guess the [proprietary?
Realtek driver does not suffer from this bug]?
Justin.
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