On 2016-11-18 11:25:26 [+0100], Oussama Ghorbel wrote: > Hi, Hi, > I have written recently a patch that solve the FIQ issue with RT > Preempt on the 4-core Raspberry Pi board. > Please see this article for full description on the solution. > https://www.osadl.org/Single-View.111+M5c03315dc57.0.html So you have ~13ms max latency without the patch but with disabled FIQ and 170us with the Patch? Something does not look right. Anyway. If you don't mind I added this information to the RT-wiki [0]. So lets hope google will point RPI users there. Could please cross check if the information is correct and add other RPI informations? I named it "Raspberry PI 3". I am not sure if the problem is also relevant on "Raspberry PI" and "Raspberry PI 2". One thing: The patch is against dwc_otg. Since v3.14 we have the dwc2 driver mainline. Is it possible to use that one instead the dwc_otg? It provides host and device functionality and it should be the same USB core. [0] https://wiki.linuxfoundation.org/realtime/documentation/known_limitations > Regards, > Oussama Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
