Performance problem

Hi.

We have two QNX 4 systems here with 512MB RAM, Pentium III Copermine 600 MHz
and 800 MHz CPUs. We are using 3COM905 fast etherlink cards.

Whenever I do a copy of a large file to these systems, the mouse and
keyboard stop responding for small periods of time (up to 1 or 2 seconds).

What’s going on?

How can I fix this?

TIA

Augie

“Augie Henriques” <augiehenriques@hotmail.com> wrote in message
news:9p2hob$fpd$1@inn.qnx.com

Hi.

We have two QNX 4 systems here with 512MB RAM, Pentium III Copermine 600
MHz
and 800 MHz CPUs. We are using 3COM905 fast etherlink cards.

Whenever I do a copy of a large file to these systems, the mouse and
keyboard stop responding for small periods of time (up to 1 or 2 seconds).

What’s going on?

Were the argument to Fsys (in the boot image) changed from the default?

Run sac or sysmon at high priority and check who’s running at higher
priority
then Photon

How can I fix this?

TIA

Augie

Hi Mario.

“Mario Charest” <mcharest@voidzinformatic.com> wrote in message
news:9p599f$3tf$1@inn.qnx.com

“Augie Henriques” <> augiehenriques@hotmail.com> > wrote in message
news:9p2hob$fpd$> 1@inn.qnx.com> …
Hi.

We have two QNX 4 systems here with 512MB RAM, Pentium III Copermine 600
MHz
and 800 MHz CPUs. We are using 3COM905 fast etherlink cards.

Whenever I do a copy of a large file to these systems, the mouse and
keyboard stop responding for small periods of time (up to 1 or 2
seconds).

What’s going on?


Were the argument to Fsys (in the boot image) changed from the default?

No.

Run sac or sysmon at high priority and check who’s running at higher
priority
then Photon

Fsys, Fsys.eide, Net, all the usual stuff. Does the size of any buffers
change with the larger amount of memory for either Net or the Fsys stuff?

Someone is not leaving enough CPU time for the regular stuff to take place
durring a regular ‘cp’ command from one node to another.

What’s going on? Do you see this?

TIA

Augie


How can I fix this?

TIA

Augie
\

“Hardware Support Account” <hw@qnx.com> wrote in message
news:9pa0vu$si0$1@nntp.qnx.com

Mario Charest <> mcharest@voidzinformatic.com> > wrote:

“Augie Henriques” <> augiehenriques@hotmail.com> > wrote in message
news:9p2hob$fpd$> 1@inn.qnx.com> …
Hi.

We have two QNX 4 systems here with 512MB RAM, Pentium III Copermine
600
MHz
and 800 MHz CPUs. We are using 3COM905 fast etherlink cards.

Whenever I do a copy of a large file to these systems, the mouse and
keyboard stop responding for small periods of time (up to 1 or 2
seconds).

What’s going on?


Were the argument to Fsys (in the boot image) changed from the default?

Run sac or sysmon at high priority and check who’s running at higher
priority
then Photon

Also, is this just a default install of the OS?

Yes. Same thing a have been doing for a while on other systems. The only
difference is that the CPUs are faster and have more memory.

Augie

E.


How can I fix this?

TIA

Augie
\

Mario Charest <mcharest@voidzinformatic.com> wrote:

“Augie Henriques” <> augiehenriques@hotmail.com> > wrote in message
news:9p2hob$fpd$> 1@inn.qnx.com> …
Hi.

We have two QNX 4 systems here with 512MB RAM, Pentium III Copermine 600
MHz
and 800 MHz CPUs. We are using 3COM905 fast etherlink cards.

Whenever I do a copy of a large file to these systems, the mouse and
keyboard stop responding for small periods of time (up to 1 or 2 seconds).

What’s going on?


Were the argument to Fsys (in the boot image) changed from the default?

Run sac or sysmon at high priority and check who’s running at higher
priority
then Photon

Also, is this just a default install of the OS?

E.


How can I fix this?

TIA

Augie

Just a thought:

More memory means a bigger Fsys cache (1/8 of total memory). Fsys flushes
the cache at its own priority so if you happen to be doing some lower
priority task when the cache flushes you are at its mercy.

You might want to reduce the cache size by using the -c option to Fsys and
see if that helps.

“Hardware Support Account” <> hw@qnx.com> > wrote in message
news:9pa0vu$si0$> 1@nntp.qnx.com> …
Mario Charest <> mcharest@voidzinformatic.com> > wrote:

“Augie Henriques” <> augiehenriques@hotmail.com> > wrote in message
news:9p2hob$fpd$> 1@inn.qnx.com> …
Hi.

We have two QNX 4 systems here with 512MB RAM, Pentium III Copermine
600
MHz
and 800 MHz CPUs. We are using 3COM905 fast etherlink cards.

Whenever I do a copy of a large file to these systems, the mouse and
keyboard stop responding for small periods of time (up to 1 or 2
seconds).

What’s going on?


Were the argument to Fsys (in the boot image) changed from the
default?

Run sac or sysmon at high priority and check who’s running at higher
priority
then Photon

Also, is this just a default install of the OS?

Yes. Same thing a have been doing for a while on other systems. The only
difference is that the CPUs are faster and have more memory.

Augie


E.


How can I fix this?

TIA

Augie


\

Previously, Richard Brown wrote in qdn.public.qnx4:

Just a thought:

More memory means a bigger Fsys cache (1/8 of total memory). Fsys flushes
the cache at its own priority so if you happen to be doing some lower
priority task when the cache flushes you are at its mercy.

You might want to reduce the cache size by using the -c option to Fsys and
see if that helps.

A good idea, however you should note that the time spent in Fsys itself
is usually minimal. Once Fsys sees that it must flush some data to
disk, it sets up the hardware and goes to sleep waiting for an interrupt.
The amount of cycles will depend on which driver you are using of course.


Mitchell Schoenbrun --------- maschoen@pobox.com

Hi.

“Mitchell Schoenbrun” <maschoen@pobox.com> wrote in message
news:Voyager.011002060310.4030A@schoenbrun.com

Previously, Richard Brown wrote in qdn.public.qnx4:
Just a thought:

More memory means a bigger Fsys cache (1/8 of total memory). Fsys
flushes
the cache at its own priority so if you happen to be doing some lower
priority task when the cache flushes you are at its mercy.

You might want to reduce the cache size by using the -c option to Fsys
and
see if that helps.

A good idea, however you should note that the time spent in Fsys itself
is usually minimal. Once Fsys sees that it must flush some data to
disk, it sets up the hardware and goes to sleep waiting for an interrupt.
The amount of cycles will depend on which driver you are using of course.


Mitchell Schoenbrun --------- > maschoen@pobox.com
\

I have tried to start Fsys using the -c 32M option. This should give Fsys
the same amount of cache it has for a 256MB RAM system.

I saw no major difference in performance.

I think either Fsys or Net is taking to long during a cp from another node.
Any more good ideas?

Not only does it affect the mouse, but it also affects any photon app that
may be running.

TIA

Augie