51 messages in org.freebsd.freebsd-armRe: Performance of SheevaPlug on 8-st...| From | Sent On | Attachments |
|---|---|---|
| Maks Verver | Mar 6, 2010 12:39 pm | |
| Bernd Walter | Mar 6, 2010 1:16 pm | |
| Bernd Walter | Mar 6, 2010 1:51 pm | |
| M. Warner Losh | Mar 6, 2010 2:25 pm | |
| Maks Verver | Mar 6, 2010 5:39 pm | |
| Bernd Walter | Mar 6, 2010 10:59 pm | |
| Maks Verver | Mar 7, 2010 11:55 am | |
| Bernd Walter | Mar 7, 2010 12:11 pm | |
| Rafal Jaworowski | Mar 7, 2010 12:30 pm | |
| Mark Tinguely | Mar 7, 2010 1:25 pm | |
| Maks Verver | Mar 7, 2010 1:38 pm | |
| Bernd Walter | Mar 7, 2010 4:26 pm | |
| Bernd Walter | Mar 7, 2010 5:30 pm | |
| Bernd Walter | Mar 7, 2010 6:16 pm | |
| Mark Tinguely | Mar 7, 2010 6:59 pm | |
| Bernd Walter | Mar 8, 2010 12:20 am | |
| Jacques Fourie | Mar 8, 2010 12:25 am | |
| Hans Petter Selasky | Mar 8, 2010 1:06 am | |
| Bernd Walter | Mar 8, 2010 4:40 am | |
| Mark Tinguely | Mar 8, 2010 5:57 am | |
| M. Warner Losh | Mar 8, 2010 6:07 am | |
| Maks Verver | Mar 8, 2010 6:28 am | |
| Grzegorz Bernacki | Mar 8, 2010 7:50 am | |
| M. Warner Losh | Mar 8, 2010 8:14 am | |
| Mark Tinguely | Mar 8, 2010 10:18 am | |
| Bernd Walter | Mar 8, 2010 10:41 am | |
| Mark Tinguely | Mar 8, 2010 11:36 am | |
| Bernd Walter | Mar 8, 2010 11:54 am | |
| Maks Verver | Mar 8, 2010 3:50 pm | |
| Rafal Jaworowski | Mar 9, 2010 2:03 am | |
| Grzegorz Bernacki | Mar 9, 2010 8:11 am | |
| Mark Tinguely | Mar 9, 2010 10:11 am | |
| Grzegorz Bernacki | Mar 10, 2010 5:57 am | |
| Rafal Jaworowski | Mar 10, 2010 6:04 am | |
| Mark Tinguely | Mar 10, 2010 6:20 am | |
| Bernd Walter | Mar 10, 2010 6:37 am | |
| Rafal Jaworowski | Mar 10, 2010 7:52 am | |
| Mark Tinguely | Mar 10, 2010 8:41 am | |
| Mark Tinguely | Mar 10, 2010 10:06 am | |
| Rafal Jaworowski | Mar 11, 2010 1:18 pm | |
| Maks Verver | Mar 12, 2010 9:51 am | |
| Maks Verver | Mar 12, 2010 11:58 am | |
| Mark Tinguely | Mar 12, 2010 1:20 pm | |
| Mark Tinguely | Mar 15, 2010 10:50 am | |
| Mark Tinguely | Mar 22, 2010 7:54 am | |
| Olivier Houchard | Mar 22, 2010 8:05 am | |
| Mark Tinguely | Mar 22, 2010 9:25 am | |
| Steve Woodford | Mar 23, 2010 1:14 am | |
| Grzegorz Bernacki | Mar 23, 2010 4:13 am | |
| Mark Tinguely | Mar 23, 2010 5:56 am | |
| Mark Tinguely | Nov 3, 2010 9:08 am |
| Subject: | Re: Performance of SheevaPlug on 8-stable | |
|---|---|---|
| From: | Bernd Walter (tic...@cicely7.cicely.de) | |
| Date: | Mar 7, 2010 12:11:51 pm | |
| List: | org.freebsd.freebsd-arm | |
On Sun, Mar 07, 2010 at 08:56:14PM +0100, Maks Verver wrote:
On 03/07/2010 08:00 AM, Bernd Walter wrote:
That's probably just because of different CPUs. I see a similar output on all of my systems with ARM920T CPU and still there is something wrong.
That's strange indeed. I'm not sure if our problems are at all related (as in: caused by the same problem) as you seem to be using fairly different hardware.
That's true, but the symptoms I see are quite similar, although the OS version seem to have an influence on how high the performance loss actually is. This fact is especially puzzling, because I would have either expected similar results or calulated performance.
In my case the kernel (at boot up) doesn't seem to even think caches are enabled, which gives me some hope that if they were, then they would work. In your case the kernel claims to enable them but then they don't work. Seems different to me.
It is just different code printing the details for your CPU. Take a look into sys/arm/arm/identcpu.c. There is "if xxx IC disabled else IC enabled" printing - if you see neither it is not printing from this code at all.
Your loop isn't doing any data access, so it's just saying something about ICACHE not working.
True enough.
But maybe it is not ICACHE itself and the memory pages are just declared uncacheable?
Another possibility. If anyone has suggestions on how to investigate this, I'd love to hear it.
Me too.
-- B.Walter <ber...@bwct.de> http://www.bwct.de Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
_______________________________________________ free...@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-arm To unsubscribe, send any mail to "free...@freebsd.org"