Weir network performance problem

Weir network performance problem

Post by Bz » Fri, 07 Jan 2000 04:00:00



Hi all,
  I'm using HP-UX 11.0 with a 100Mbp FastEthernet connection. The
machine is HP-9000 D-class with a native 10Mbps Ethernet (unused).
I'm having problem with FTP/WWW server where the upload speed
to the HP is extremely fast (1Meg/s), yet downloading some files from
it is extremely slow (12K/s). Have any idea of what could be the
cause?  Here are some info. from dmsg output:

    System Console is on the Built-In Serial Interface
btlan0: INITIALIZING: 82556 EISA 10/100BASE-TX card in slot 8/20/5/4
Logical volume 64, 0x3 configured as ROOT
Logical volume 64, 0x2 configured as SWAP
Logical volume 64, 0x2 configured as DUMP
    Swap device table:  (start & size given in 512-byte blocks)
        entry 0 - major is 64, minor is 0x2; start = 0, size = 1048576
    Dump device table:  (start & size given in 1-Kbyte blocks)
        entry 0 - major is 31, minor is 0x5000; start = 88928, size =
524288
Starting the STREAMS daemons-phase 1
Create STCP device files
    B2352B/9245XB HP-UX (B.11.00) #1: Thu Nov  6 01:58:21 PST 1997

Memory Information:
    physical page size = 4096 bytes, logical page size = 4096 bytes
    Physical: 262144 Kbytes, lockable: 192740 Kbytes, available:
224532 Kbytes

Any suggestion would be greatly appreciated.

Tri

 
 
 

Weir network performance problem

Post by Rick Jone » Fri, 07 Jan 2000 04:00:00



>   I'm using HP-UX 11.0 with a 100Mbp FastEthernet connection. The
> machine is HP-9000 D-class with a native 10Mbps Ethernet (unused).
> I'm having problem with FTP/WWW server where the upload speed to the
> HP is extremely fast (1Meg/s), yet downloading some files from it is
> extremely slow (12K/s). Have any idea of what could be the cause?
> Here are some info. from dmsg output:

are the download targets on the same subnet, or are they more remote?

Quote:>     System Console is on the Built-In Serial Interface
> btlan0: INITIALIZING: 82556 EISA 10/100BASE-TX card in slot 8/20/5/4

EISA? Bletch. HSC would be much better, though EISA alone would not
explain a discrepancy bew* upload/download.

Quote:> Any suggestion would be greatly appreciated.

Check the output of netstat -p tcp before a download and then again
after it - perhaps using beforeafter from ftp.cup.hp.com under
dist/networking/...something... to do the math for you

if that shows retransmissions of a non-trivial rate, check the
lanadmin stats for the interface and look for outbound errors

i do not know if the EISA 10/100 driver has support for outbound
promiscuous mode yet or not, but if it does and you have all those
patches installed, you could take a tcpdump trace of one of the
downloads. that, or a similar trace on the destination perhaps.

rick jones

BTW, which "extension" to 11 are you running and/or which patches (esp
transport and streams and the like).

--
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to email, or post, but please do not do both...
my email address is raj in the cup.hp.com domain...

 
 
 

Weir network performance problem

Post by Robert Klut » Fri, 07 Jan 2000 04:00:00



>I'm having problem with FTP/WWW server where the upload speed
>to the HP is extremely fast (1Meg/s), yet downloading some files from
>it is extremely slow (12K/s).

Double check the duplex setting on both hosts and the switches.  If
you are using hubs, try forcing both sides to half duplex and trying
again.

Robert Klute
Hewlett-Packard Performance Program

(These postings are mine, not HP's)

 
 
 

Weir network performance problem

Post by Henri » Sat, 08 Jan 2000 04:00:00


Hi,

to me it sounds just like you are having problems with half/full duplex
settings. Check your card (lanadmin) and your switch and  try to differ the
settings.

Regards,

Henrik


Quote:>Hi all,
>  I'm using HP-UX 11.0 with a 100Mbp FastEthernet connection. The
>machine is HP-9000 D-class with a native 10Mbps Ethernet (unused).
>I'm having problem with FTP/WWW server where the upload speed
>to the HP is extremely fast (1Meg/s), yet downloading some files from
>it is extremely slow (12K/s). Have any idea of what could be the
>cause?  Here are some info. from dmsg output:

>    System Console is on the Built-In Serial Interface
>btlan0: INITIALIZING: 82556 EISA 10/100BASE-TX card in slot 8/20/5/4
>Logical volume 64, 0x3 configured as ROOT
>Logical volume 64, 0x2 configured as SWAP
>Logical volume 64, 0x2 configured as DUMP
>    Swap device table:  (start & size given in 512-byte blocks)
>        entry 0 - major is 64, minor is 0x2; start = 0, size = 1048576
>    Dump device table:  (start & size given in 1-Kbyte blocks)
>        entry 0 - major is 31, minor is 0x5000; start = 88928, size =
>524288
>Starting the STREAMS daemons-phase 1
>Create STCP device files
>    B2352B/9245XB HP-UX (B.11.00) #1: Thu Nov  6 01:58:21 PST 1997

>Memory Information:
>    physical page size = 4096 bytes, logical page size = 4096 bytes
>    Physical: 262144 Kbytes, lockable: 192740 Kbytes, available:
>224532 Kbytes

>Any suggestion would be greatly appreciated.

>Tri

 
 
 

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