Messages in this thread | | | Date | Tue, 6 Jan 2004 01:46:30 +0100 (CET) | From | Guennadi Liakhovetski <> | Subject | 2.6.0 NFS-server low to 0 performance |
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Hello
The NFS server on a PC with a 2.6.0 (release) kernel slows down to a crawl or stops completely.
Searched archives - nothing fits exact enough.
The server (PC1) is a 900MHz Duron with 384M RAM and a tulip 10/100 (LinkSys) network card (Linksys Network Everywhere Fast Ethernet 10/100 model NC100 (rev 17)).
Clients: PC2 - Pentium 133MHz with 24M RAM and an onboard Lance 79C970 10mbps network card, a SA1100 platform (Tuxscreen / Shannon) with 16M RAM, PCMCIA Netgear 10/100mbps ne2000-compatible (pcnet_cs + 8390) card a PXA250 platform (Inphinity / Triton starter-kit) with 64M RAM, onboard SMC91C11xFD (smc91x driver) 10/100 chip
In the tests below I was copying a 4M file from an NFS-mounted directory to a RAM-based fs (ramfs / tmpfs). Here are results:
server with 2.6.0 kernel:
fast:2.6.0-test11 2m21s (*) fast:2.4.20 16.5s SA1100:2.4 never finishes (*) PXA:2.4.21-rmk1-pxa1 as above PXA:2.6.0-rmk1-pxa as above
server: 2.4.21
fast:2.6.0-test11 6s fast:2.4.20 5s SA1100:2.4.19-rmk7 3.22s PXA:2.4.21-rmk1-pxa1 7s PXA:2.6.0-rmk2-pxa 1) 50s (**) (***) 2) 27s (**)
(*) Messages "NFS server not responding" / "NFS server OK", "mount version older than kernel" on mount
(**) Messages "NFS server not responding" / "NFS server OK", "mount version older than kernel" on mount, trafic shows as several peaks
(***) 2.6.0-rmk2-pxa corresponds to the 2.6.0-rmk2 kernel with a PXA-patch forward-ported from diff-2.6.0-test2-rmk1-pxa1.
The LinkSys card I bought recently, before I used a RTL (3c59x) card, only capable of 10mbps, I never saw such problems with it, but I, probably, never tried NFS under 2.6.0 with it - have to try too.
It is not just a problem of 2.6 with those specific network configurations - ftp / http / tftp transfers work fine. E.g. wget of the same file on the PXA with 2.6.0 from the PC1 with 2.4.21 over http takes about 2s. So, it is 2.6 + NFS.
Is it fixed somewhere (2.6.1-rcx?), or what should I try / what further information is required?
Thanks Guennadi --- Guennadi Liakhovetski
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