The clock settings of the AT91SAM9261-EK board I am using, displayed by the kernel are: Clocks: Clocks: CPU 198 MHz, master 99 MHz, main 18.432 MHz
Running a 2.6.19 I-pipe kernel, setting the nucleus latency (/proc/xenomai/latency) to 323us, I get a worst case latency of 231 us over 6 hours, under dd if=/dev/zero of=/dev/null load. Histogramm has been shortened. Next time I will add the parameter "-H 500" to increase histogramm size. Here are the latency histogram results. ---|--param|----range-|--samples HSD| min| 34 - 35 | 1 HSD| min| 35 - 36 | 4 HSD| min| 36 - 37 | 8 HSD| min| 37 - 38 | 13 HSD| min| 38 - 39 | 34 HSD| min| 39 - 40 | 27 HSD| min| 40 - 41 | 40 HSD| min| 41 - 42 | 57 HSD| min| 42 - 43 | 87 HSD| min| 43 - 44 | 168 HSD| min| 44 - 45 | 594 HSD| min| 45 - 46 | 2808 HSD| min| 46 - 47 | 7334 HSD| min| 47 - 48 | 7966 HSD| min| 48 - 49 | 3047 HSD| min| 49 - 50 | 125 HSD| min| 50 - 51 | 5 HSD| min| 73 - 74 | 1 ---|--param|----range-|--samples HSD| avg| 34 - 35 | 1 HSD| avg| 35 - 36 | 4 HSD| avg| 36 - 37 | 8 HSD| avg| 37 - 38 | 13 HSD| avg| 38 - 39 | 34 HSD| avg| 39 - 40 | 27 HSD| avg| 40 - 41 | 40 HSD| avg| 41 - 42 | 57 HSD| avg| 42 - 43 | 87 HSD| avg| 43 - 44 | 168 HSD| avg| 44 - 45 | 608 HSD| avg| 45 - 46 | 3032 HSD| avg| 46 - 47 | 9985 HSD| avg| 47 - 48 | 20644 HSD| avg| 48 - 49 | 38564 HSD| avg| 49 - 50 | 38041 HSD| avg| 50 - 51 | 41848 HSD| avg| 51 - 52 | 36631 HSD| avg| 52 - 53 | 34410 HSD| avg| 53 - 54 | 37510 HSD| avg| 54 - 55 | 40837 HSD| avg| 55 - 56 | 38238 HSD| avg| 56 - 57 | 30134 HSD| avg| 57 - 58 | 27623 HSD| avg| 58 - 59 | 11770 HSD| avg| 59 - 60 | 6833 HSD| avg| 60 - 61 | 4652 HSD| avg| 61 - 62 | 3958 HSD| avg| 62 - 63 | 3773 HSD| avg| 63 - 64 | 3456 HSD| avg| 64 - 65 | 3048 HSD| avg| 65 - 66 | 2725 HSD| avg| 66 - 67 | 2462 HSD| avg| 67 - 68 | 3107 HSD| avg| 68 - 69 | 2961 HSD| avg| 69 - 70 | 7184 HSD| avg| 70 - 71 | 8252 HSD| avg| 71 - 72 | 8291 HSD| avg| 72 - 73 | 6977 HSD| avg| 73 - 74 | 37251 HSD| avg| 74 - 75 | 64192 HSD| avg| 75 - 76 | 11019 HSD| avg| 76 - 77 | 21165 HSD| avg| 77 - 78 | 43915 HSD| avg| 78 - 79 | 70855 HSD| avg| 79 - 80 | 129983 HSD| avg| 80 - 81 | 280648 HSD| avg| 81 - 82 | 388961 HSD| avg| 82 - 83 | 287156 HSD| avg| 83 - 84 | 133873 HSD| avg| 84 - 85 | 52948 HSD| avg| 85 - 86 | 1175229 HSD| avg| 86 - 87 | 43142254 HSD| avg| 87 - 88 | 19364608 HSD| avg| 88 - 89 | 2609775 HSD| avg| 89 - 90 | 57806 HSD| avg| 90 - 91 | 14457 HSD| avg| 91 - 92 | 20810 HSD| avg| 92 - 93 | 30672 HSD| avg| 93 - 94 | 8841 HSD| avg| 94 - 95 | 1762 HSD| avg| 95 - 96 | 1896 HSD| avg| 96 - 97 | 34505 HSD| avg| 97 - 98 | 38357 HSD| avg| 98 - 99 | 19627 HSD| avg| 99 -100 | 558554 ---|--param|----range-|--samples HSD| max| 99 -100 | 22319 HSH|--param|--samples-|--average--|---stddev-- HSS| min| 22319| 46.376| 1.268 HSS| avg| 69079112| 23.945| 62.257 HSS| max| 22319| 99.000| 0.000 ---|------------|------------|------------|--------|------------------------- RTS| 34.793| 86.662| 230.992| 0| 06:11:40/06:11:40 -- Alexandre BOUIN Adeneo 2, chemin du Ruisseau - BP21 69136 Ecully Cedex France Tel : +33-4 72 18 08 40 _______________________________________________ Adeos-main mailing list [email protected] https://mail.gna.org/listinfo/adeos-main
