Re: Latency problem in rtai-4.0 with kernel 3.5.7
Paolo Mantegazza <[email protected]>
| Newsgroups | gmane.linux.real-time.rtai |
|---|---|
| Message-ID | <[email protected]> |
Does your application do start_rt_timer? Does your application have tasks at priority 0? Paolo On 04/06/2016 07:27 AM, Sameer wrote: > hi Paolo, > Thanks for reply. > > i run latency test alone. it shows overrun count 0 but whenever i > load my application overrun start to increment. > > Please find attached latency test result. > > -- > Thanks & Regards, > > *Sameer Zungare* > +91 9021918228 > */iASYS/* > *Product Development Center* > 401 A/2, Nano Space > Baner-Pashan link road, Baner > Pune 411045, India > Ph. +91 96234 47255 ext. xxx > www.iasys.co.in > > > On 04/05/2016 8:36 PM, Paolo Mantegazza wrote: >> You should run the latency test alone and check if the 4 ms latency >> appears periodically. >> Paolo >> >> On 04/05/2016 04:49 PM, Sameer wrote: >>> hi, >>> >>> Please find attached latency test result. >>> >>> Iam facing latency problem in my real time application.I have 4 real >>> time task exucting in user space at 10ms & one kernel module task >>> which is executing at 1ms. >>> >>> my application is randomly stuck for 2-3 sec. sometimes greater than >>> this also. simulataneously i run latency test it also shows overruns >>> count more than 200.it is not deterministic behaviour. >>> my current machine has below configuration >>> >>> 1.Ubunbtu-12.04 >>> 2.RTAI-4.0 >>> 3.kernel 3.5.7 >>> 4.Cpu core -Intel Pentium 4. >>> 5.Timer-tsc. >>> 6.No. of core-1. >>> >>> The same applications work deterministic in my older system which >>> has kernel 2.6.23 & rtai-3.9 & centos distro with same PC. >>> >>> >>> Is there any problem with kernel or rtai or ubuntu or kernel >>> configuaration? >>> >>> Please let me know any solution for this problem. >>> -- >>> Thanks & Regards, >>> >>> *Sameer Zungare* >>> +91 9021918228 >>> */iASYS/* >>> *Product Development Center* >>> 401 A/2, Nano Space >>> Baner-Pashan link road, Baner >>> Pune 411045, India >>> Ph. +91 96234 47255 ext. xxx >>> www.iasys.co.in >> >> >> >> > > > _______________________________________________ Rtai mailing list [email protected] https://mail.rtai.org/cgi-bin/mailman/listinfo/rtai