Hi Gilles, I believe the problems I was having several months ago with erratic timing on the Beagleboard when running dohell may be related to this. I'm wondering if there are still plans to formally wrap the patch into the official Xenomai tree?
Thanks! - Eric On Fri, May 25, 2012 at 8:20 AM, Gilles Chanteperdrix <[email protected]> wrote: > On 05/25/2012 11:18 AM, Mitchell Tasman wrote: >> Gilles, >> >> On 05/22/2012 05:30 PM, Gilles Chanteperdrix wrote: >>> On 05/22/2012 11:22 PM, Mitchell Tasman wrote: >>>> I have applied the patch that you supplied, and find a dramatic >>>> reduction in the maximum latency experienced in servicing edge-triggered >>>> GPIO interrupts. In testing so far today with the new patch, I have not >>>> encountered a single instance of the sort of extreme latency that >>>> prompted my query to the mailing list. >>>> >>>> Might you consider applying the new patch to I-Pipe for ARM 2.6.38.8, >>>> and publishing a new revision of that patch set? This could be of >>>> significant benefit to those members of the Xenomai community that are >>>> presently using a 2.6.38.8 kernel on ARM platforms. >>>> >>>> You might also consider addressing/replacing the original "ipipe/arm: >>>> defer chained interrupts handling" patch that was applied to I-Pipe for >>>> ARM 3.0.13, if the new patch is relevant to that kernel as well. >> >>> Yes, that's the plan. I am just waiting for Jean-Pascal's result to >>> confirm that everything is fine. >> >> I thought I'd report that testing of >> adeos-ipipe-2.6.38.8-arm-1.18-06.patch plus the revised "IRQ Chaining" >> patch that you e-mailed continues to show a dramatic reduction in the >> maximum latency in servicing edge-triggered GPIO interrupts. Good news >> as well is that the load on the Linux domain (e.g. dohell vs. idle) >> appears to have much less effect on the latency in servicing such >> interrupts than was previously the case. >> >> I noticed that Jean-Pascal reported success as well, on 23 May. >> >> Thank you once again for your excellent support, and I very much look >> forward to the updated I-Pipe for ARM 2.6.38.8 patch set. > > You are welcome. The patch should be done during the week-end. > > -- > Gilles. > > _______________________________________________ > Xenomai mailing list > [email protected] > http://www.xenomai.org/mailman/listinfo/xenomai _______________________________________________ Xenomai mailing list [email protected] http://www.xenomai.org/mailman/listinfo/xenomai
