On Thursday 15 September 2005 11:31,
[EMAIL PROTECTED] wrote:
> I just played a dvd on my ltsp workstation using the Totem Movie Player=
>
> > and got a very choppy output. On the ltsp-server the dvd played
> > normally. I am trying to figure out why this is the case.
> >=20
> >=20
> > My setup is; server: Mandrake 10.1 on a compaq deskpro pentium III, 500=
> >
> > Mhz, with 260 Mb of ram. The ethernet card is a 3-COM 3C905c-TXM,
> > etherlink 10/100 PCI. I recently installed ltsp 4.1.1 from the
> > ltsp-4.1.1-1.iso isoimage.
> >=20
> >=20
> > The workstation is a compacq deskpro pentium I, 200 Mhz mmx, with 64 Mb=
> >
> > ram. 3-COM 3c905-TX, 10/100 PCI.
> >=20
> > Using the =B4Monitor Connection=A1 utility in the "Mandrake Control Cen=
>
> ter",
>
> > I can see that the transmition speed on eth1, which connects to my
> > internal network, is an average of 4.3 MB/s. This is much lower than th=
>
> e
>
> > 100 MB/s I believe my NICs are capable of giving.
> >=20
> > Is there something I should be doing to get the connection between the
> > server and workstation to run faster?
>
> Running such graphics intensive applications as a movie player, sending=20
> the output across the network to a thin client, will tax your network=20
> severly. Although screen size and color depth can influence the=20
> bandwidth usage, you are stretching all the components to their limit.
>
> Network cards and their interrupt levels play an important part here, as =
>
> do the cabling and switches. It may well be that the thin client CPU is=20
> very busy handling the interrupts generated by the NIC, and has little=20
> time to deal with the graphics. This could also be the case on the=20
> server. CAT5 cables should be capable of transmitting 100 mbits/sec, but =
>
> there might bottlenecks also there. I assume you have a switched network =
>
> with full duplex capabilities that are used by the NICs, otherwise you=20
> bandwidth will not be 100 mbits/sec in any case.
>
> It is possible to monitor the hardware parameters on the thin client=20
> (use ltspinfo, see http://wiki.ltsp.org/twiki/bin/view/Ltsp/LtspinfoTips =
>
> for a primer), see if you can discover something from that. On the=20
> server it is easier to get info, open a terminal window and use the comma=
> nd
>
> vmstat 2
>
> to see output that will be quite revealing.
I don't believe this is network related, ok i KNOW, but <grin>:
I setup various ltsp clients to run mythtv. All were awful.
Using the Same Hardware, Same network I made a custom NFS-root system (SuSE
min-graphics + mythtv. It too was terrid.
I used the Same Hardware, Same Network, Same image (whole file system) but
installed on a local harddisk - near perfect
I used ltsp-ize to make a flash+ram version fat-client also near perfect.
I watch 3 tv streams on the same network at the same time, just as perfect.
Conclusion: NFS root == bad network video
100M network will support 2 ltsp + 3 TV without any ill effects
My slight jerkyness on fast moving scenes et MotoGP, Footy are
my videocard or the DVICO HDTV cards.
James
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