Con Kolivas <[EMAIL PROTECTED]> writes: > Sure enough I found the bug in less than 5 mins, and it would > definitely cause this terrible behaviour. > > A silly bracket transposition error on my part :P
The corrected version works noticeably better, but still nowhere near as well as SCHED_FIFO. The first run had a cluster of really bad xruns. The second and third were much better, but still with numerous small xruns. http://www.joq.us/jack/benchmarks/sched-iso-fix/ With a compile running in the background it was a complete failure. Some kind of big xrun storm triggered a collapse on every attempt. http://www.joq.us/jack/benchmarks/sched-iso-fix+compile/ The summary statistics are mixed. The delay_max is noticeably better than before, but still much worse than SCHED_FIFO. But, the xruns are really bad news... http://www.joq.us/jack/benchmarks/.SUMMARY # sched-iso-fix Delay Maximum . . . . . . . . : 33894 usecs Delay Maximum . . . . . . . . : 745 usecs Delay Maximum . . . . . . . . : 341 usecs # sched-iso Delay Maximum . . . . . . . . : 21410 usecs Delay Maximum . . . . . . . . : 36830 usecs Delay Maximum . . . . . . . . : 4062 usecs # sched-fifo Delay Maximum . . . . . . . . : 347 usecs Delay Maximum . . . . . . . . : 277 usecs Delay Maximum . . . . . . . . : 246 usecs Delay Maximum . . . . . . . . : 199 usecs Delay Maximum . . . . . . . . : 261 usecs Delay Maximum . . . . . . . . : 305 usecs # sched-iso-fix+compile Delay Maximum . . . . . . . . : 14549 usecs Delay Maximum . . . . . . . . : 38961 usecs Delay Maximum . . . . . . . . : 26904 usecs # sched-iso+compile Delay Maximum . . . . . . . . : 98909 usecs Delay Maximum . . . . . . . . : 39414 usecs Delay Maximum . . . . . . . . : 40294 usecs Delay Maximum . . . . . . . . : 217192 usecs Delay Maximum . . . . . . . . : 156989 usecs # sched-fifo+compile Delay Maximum . . . . . . . . : 285 usecs Delay Maximum . . . . . . . . : 269 usecs Delay Maximum . . . . . . . . : 277 usecs Delay Maximum . . . . . . . . : 569 usecs Delay Maximum . . . . . . . . : 461 usecs Delay Maximum . . . . . . . . : 405 usecs Delay Maximum . . . . . . . . : 286 usecs Delay Maximum . . . . . . . . : 579 usecs # sched-iso-fix XRUN Count . . . . . . . . . : 26 XRUN Count . . . . . . . . . : 24 XRUN Count . . . . . . . . . : 17 # sched-iso XRUN Count . . . . . . . . . : 15 XRUN Count . . . . . . . . . : 17 XRUN Count . . . . . . . . . : 5 # sched-fifo XRUN Count . . . . . . . . . : 0 XRUN Count . . . . . . . . . : 0 XRUN Count . . . . . . . . . : 0 XRUN Count . . . . . . . . . : 0 XRUN Count . . . . . . . . . : 0 XRUN Count . . . . . . . . . : 0 # sched-iso-fix+compile XRUN Count . . . . . . . . . : 22 XRUN Count . . . . . . . . . : 44 XRUN Count . . . . . . . . . : 39 # sched-iso+compile XRUN Count . . . . . . . . . : 44 XRUN Count . . . . . . . . . : 46 XRUN Count . . . . . . . . . : 45 XRUN Count . . . . . . . . . : 27 XRUN Count . . . . . . . . . : 101 # sched-fifo+compile XRUN Count . . . . . . . . . : 0 XRUN Count . . . . . . . . . : 0 XRUN Count . . . . . . . . . : 0 XRUN Count . . . . . . . . . : 4 XRUN Count . . . . . . . . . : 0 XRUN Count . . . . . . . . . : 0 XRUN Count . . . . . . . . . : 0 XRUN Count . . . . . . . . . : 0 -- joq - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
