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: | Rafal Jaworowski (ra...@semihalf.com) | |
| Date: | Mar 10, 2010 6:04:48 am | |
| List: | org.freebsd.freebsd-arm | |
On 2010-03-10, at 14:58, Grzegorz Bernacki wrote:
There are a few data dangling allocations that I would like to see closed from the multiple kernel allocation fix. *IN THEORY, IF* a page is allocated via the arm_nocache (DMA COHERENT) or a sendfile, then it is never marked as unallocated. *IN THEORY*, if that page is used again, then we could falsely believe that page is being shared and we turn off the cache, eventhough it is not shared. http://www.casselton.net/~tinguely/arm_pmap_unmanaged.diff * Disclaimer: I am not sure if DMA COHERENT nor sendfiles are used in the Sheeva implementation. This is a theoritical observation of a side effect of the multiple kernel mapping patch that we did just before FreeBSD 8-release.
I instrumented code with KTRs and your theory is correct. Kernel reuse page which was previouly mapped via arm_nocache. Your patch should be applied to -current.
Bernd,
Could you confirm this also fixes the issues for you on the RM9200 machine? If
so, I'll go on and commit the changes.
Rafal
_______________________________________________ free...@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-arm To unsubscribe, send any mail to "free...@freebsd.org"