Re: Latency problem in rtai-4.0 with kernel 3.5.7
Sameer <[email protected]>
| Newsgroups | gmane.linux.real-time.rtai |
|---|---|
| Message-ID | <[email protected]> |
Hi Paolo, yes,in our application we used start_rt_timer() call.There are 4 real time tasks with different priorities 1,5,6,7. -- 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 04/06/2016 12:46 PM, Paolo Mantegazza wrote: > 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