On Fri, Mar 20, 2009 at 9:36 AM, Hiroshi DOYU <[email protected]> wrote: > From: Hiroshi DOYU <[email protected]> > Subject: Re: [PATCH B 3/3] tidspbridge: decreate timeout to a saner value > Date: Fri, 20 Mar 2009 06:54:04 +0200 (EET) > >> From: ext Felipe Contreras <[email protected]> >> Subject: Re: [PATCH B 3/3] tidspbridge: decreate timeout to a saner value >> Date: Fri, 20 Mar 2009 01:06:16 +0100 >> >> > On Fri, Mar 20, 2009 at 2:00 AM, Guzman Lugo, Fernando <[email protected]> >> > wrote: >> > > >> > > >> > > >> > > This is a stress test, it creates 4 processes and each process will do >> > > 1000 transfers using streams, so the trace is: >> > > >> > > STRM_Issue -> WMD_CHNL_AddIOReq -> IO_Schedule >> > > >> > > IO_Schedule schedules a call to IO_DPC using task let. >> > > >> > > IO_DPC -> IO_DispatchChnl -> InputChnl -> CHNLSM_InterruptDSP2 >> > > >> > > Also IO_DispatchChnl -> OutputChnl -> CHNLSM_InterruptDSP2. >> > > >> > > >> > > As we can call a lot CHNLSM_InterruptDSP2 in this test, there is a >> > > problem with the timeout. However running other tests, videos and mp3 >> > > there no problems. I think we should change to 10ms, only to make sure >> > > there is no problem when CHNLSM_InterruptDSP2 is called a lot. >> > > >> > > Let me know if you are agreed. Or have some comments about it. >> > >> > Well again, the best way to implement the wait for a slot in the >> > mailbox is with interrupts, not busy-looping. If we busy-loop too much >> > that would increase the CPU usage, and that would be bad. >> >> I think that s/w queuing of messages would be more efficient to allow >> multiple senders to continue thier work anyway, especially in the case >> of having these streamings. > > Migrating to the existing mailbox driver("plat-omap/mailbox.c") is > also another option to support multiple OMAP architectures at the same > time. That mailbox driver has already had a message queuing feature > inside and it's buildable on OMAP3.
Yeap, I have it in my to-do list, so if somebody doesn't beat me to it I play with that. Is there a way to play with the existing mailbox driver independently of dsp-bridge? -- Felipe Contreras -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
