Re: RT : Large transfert with 2.6.12rc5 + realtime-preempt-2.6.12-rc5-V0.7.47-15

["Serge Noiraud" <serge.noiraud@bull.net>]

Le mar 31/05/2005 à 18:18, K.R. Foley a écrit :
> Serge Noiraud wrote:
> > I had the same problem with rc4+47-07, rc5+47-10,47-13
> > I reproduce this problem with a tg3 driver and with e1000 driver.
> > So I think it's not a driver problem.
> > 
> > I try to copy an iso image from this machine to another one by scp.
> > after 35 to 45MB, the copy become stalled with no more transfert.
> > We can ping the target machine, all apparently is OK except the scp
> > which finish with timeout.
> > With ftp, the stalled state is about 100MB.
> > If I reboot with a standard kernel ( without RT ), no problem.
> > 
> > Perhaps there is a progress, in 47-15, the size is now 135-140MB
> > 
> > On this machine, we have an ide disk.
> > I have setup : hdparm 
> > -sh-2.05b# hdparm /dev/hda
> > 
> > /dev/hda:
> >  multcount    = 16 (on)
> >  IO_support   =  3 (32-bit w/sync)
> >  unmaskirq    =  1 (on)
> >  using_dma    =  1 (on)
> >  keepsettings =  0 (off)
> >  readonly     =  0 (off)
> >  readahead    = 256 (on)
> >  geometry     = 65535/16/63, sectors = 78165360, start = 0
> > 
> 
> Hi,
> 
> I am not sure what might be causing this problem for you. I just tried 
> to reproduce this on one of my systems but could not (scsi not ide). The 
> first time it copied 450MB before the remote system ran out of space. 
> After cleaning up a bit I got the whole 630MB without a hitch. Do you 
> have the RT patch on both systems or just on the originating system? In 
> my case its the latter. There is

The scp or ftp start on a RT machine.
The destination is an RT or Non RT machine, the problem is the same.
It's not a space problem, I have 4GB available on the destination path.
I can reproduce the phenomena at each try.
If I <CTRL C> the scp when it is stalled then relaunch the scp command, the transfert restart without problem.
I'm trying to trace this problem but I don't know how to do this.
Has someone one method ?

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