Hello!
I want to check realtime-time-functionality with the LS1021a using the PREEMPT-patch:
3.12.19-rt30 #1 SMP PREEMPT RT Thu Dec 3 12:22:32 CET 2015 armv7l GNU/Linux
The tool cyclictest give's a warning at startup: "WARN: High resolution timers not available" and the timings are bad. In the kernel-config the high resolution timers are selected. What could be the problem?
Best regards
Jan
Solved! Go to Solution.
Hello Jan Brand,
Is it possible to use our kernel released in SDK? It's a pity we do not have tech support for PTXdist, sorry for this.
BR
Lunmin
Hello Jan Brand,
Please use the latest SDK 1.9 for this.
PREEMPT_RT is not supported in SDK1.7 with component of Linux 3.12.19, for the target LS1021A.
The information is available in the information center:
Have a great day,
Lunmin
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Thank you for youre reply.
Unfortionaly I'm working with PTXdist - isn't there an available patch or what else for the high resolution timers for linux kernel?
Best regards,
Jan
Hello Jan Brand,
Below are patch of RT for LS1021A in SDK1.9 release:
sdk/linux.git - Freescale PowerPC Linux Tree
sdk/linux.git - Freescale PowerPC Linux Tree
BR
Lunmin
Hello,
compiling the kernel with the patches was succesfull. The two patches seem to have not solved the problem. Cyclictest is still saying "WARN: High resolution timers not available". Maybe the issue is elsewhere?
Best regards,
Jan
Hello Jan Brand,
Is it possible to use our kernel released in SDK? It's a pity we do not have tech support for PTXdist, sorry for this.
BR
Lunmin
Hello lunminliang,
yes that is possible! I use the kernel from SDK 1.9. The high resolution timers are integrated, thanks for your advice. The kernel works with the RFS from PTXdist and so for the first time i will use this as a workaround. Will there be a support for PTXdist in future?
BR
Jan
Thank you, i will try...
Best regards,
Jan