Re: Cannot get full speed download on ppp
Thank you John,
Just more info about it. Last night i did not give up and tried any
BIOS settings i could think of but still the problem existed except
when i tried:
chdir to /extra ( this is on /dev/hdc1 )
tried a ftp session to retrieve a zipped file - lo and behold, i
can download it ( 300K size ) at 3.1K bytes per second.
quit to session and cd to my home directory ( /dev/hda )
started a ftp session and download the same file to that directory
BAD now, the transfer rate was 2.6 K bytes per second.
This could mean that there are some problems with my /dev/hda which is
a quantum fireball 1G disk. So far i did not get bad sectors in dos,
linux always started and said disks clean. PS: the drive on /dev/hdc
is an old Maxtor 345 M harddisk (ATA mode 2 ).
I may try your suggestions later and hope that will solve download
problem.
Regards.
Paul
John T. Larkin wrote:
>
> > I don't what i have done to my system. Recently i found that my
> > download speed from our server at most can give me 2.6k byte/s ftp.
>
> You should try two things:
> 1) Use hdparm to optimize the performance of your disks. I recomend
> the '-u' option to unmask the IRQ for data transfers. Be careful
> with this, as it (supposedly) has been known not to work on some
> systems and causes severe data corruption.
> 2) Use irqtune to give the serial port the highest priority.
>
> > I used to be able to
> > get 3.1K bytes/s downloading compressed file.
> I really don't know why you used to be able to get this performance,
> but no longer (unless you just happened to hit a really busy time of
> day, and your ISP couldn't get data fast enough). My 386-40, with an
> old 8250 uart and external 28.8 modem, can get thru-put of 2.8ish for
> transfers. This generates about 6000 interupts per second, and pretty
> much pushes the limits of the old hardware (a newer 16550 uart would
> help by greatly reducing the number of interupts).
> I'm slightly confused by your situation, because you really should
> have no problems with a p-133 and internal modem or 16550 uart on the
> serial port.
> Anyway, try it, and if it helps....
>
> Good luck,
> --
> - John Larkin
> - jlarkin@hmc.edu
> - http://aij.st.hmc.edu/~jlarkin
--
------
Paul Chau Internet: chaup@nms.otc.com.au
Facilities Management & Support Phone: +61 2 9287 4647
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