Hi, I'm working on a iMX6SX custom platform and I'm trying to use Xenomai on top of it. In the past, I tried Xenomai on a iMX6SX SabreSD demoboard using kernel branch 4.1.15 from Freescale patched with Xenomai 3.0.1 (some little rejections corrected by hand), and I was able to get a maximum latency around 25us. Now, using kernel 4.1.36 from Freescale Community (that integrates the Freescale kernel branch) patched with Xenomai 3.0.3 I get maximum latencies around 45us.
Trying to figure out what is the source(s) of increased latencies, I found these two kernel logs: [ 0.000000] L2C: I-pipe: revision >= L310-r3p2 detected, forcing WA. [ 0.000000] L2C: I-pipe: write-allocate enabled, induces high latencies. I wonder why L2C-310 cache controllers that are greater or equal to r3p2 revision must be forced enabled. In past I read (and asked) in this mailing list that L2 cache should be disabled to avoid higher latencies (as kernel log says). Thanks in advance, best regards Mauro _______________________________________________ Xenomai mailing list Xenomai@xenomai.org https://xenomai.org/mailman/listinfo/xenomai
