Public bug reported:
I have a freshly installed Gutsy Gibon, and I have tested FTP
performances (from a Debian/GNU Etch server) getting consistently near
48 MB/s (48.66, 48.23, 48.04 and 48.52 MB/s) writing in /dev/shm and
with a 351 MB file. But, when I test Samba performance por the same file
in the same server, I get a consistent performance of near 13 MB/s. Even
more extrange is that, when I do two parallel Samba downloads for the
same file, I get two downloads of 13 MB/s (~26 MB/s). If I check with
three files of 100 MB, the downloads boast a speed ~36 MB/s for the
three downloads. With four files, the performance is ~40 MB/s (near FTP
performance).
My NIC card is a RTL8169:
01:07.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit
Ethernet (rev 10)
Subsystem: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit Ethernet
Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 19
I/O ports at c000 [size=256]
Memory at eb000000 (32-bit, non-prefetchable) [size=256]
[virtual] Expansion ROM at 60000000 [disabled] [size=128K]
Capabilities: [dc] Power Management version 2
The Debian server has an embedded Intel Gigabit Ethernet controller:
01:0c.0 Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet
Controller (rev 02)
Subsystem: Dell Optiplex GX260
Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 185
Memory at ff8c0000 (32-bit, non-prefetchable) [size=128K]
I/O ports at e8c0 [size=64]
Capabilities: [dc] Power Management version 2
Capabilities: [e4] PCI-X non-bridge device
Capabilities: [f0] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0
Enable-
The "socket option" in smb.conf is:
socket options = TCP_NODELAY IPTOS_LOWDELAY SO_KEEPALIVE
SO_RCVBUF=8192 SO_SNDBUF=8192
** Affects: linux-source-2.6.22 (Ubuntu)
Importance: Undecided
Status: New
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Samba slow on gigabit networks with r8169
https://bugs.launchpad.net/bugs/161778
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