Messages in this thread | | | From | Al Boldi <> | Subject | Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2 | Date | Mon, 12 Mar 2007 22:53:33 +0300 |
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Xavier Bestel wrote: > Le mardi 13 mars 2007 à 05:49 +1100, Con Kolivas a écrit : > > Again I think your test is not a valid testcase. Why use two threads for > > your encoding with one cpu? Is that what other dedicated desktop OSs > > would do? > > as your scheduler > is "strictly fair", won't that enable trivial DoS by just letting an > user fork a multitude of CPU-intensive processes ?
I don't think we have to worry about DoS with this scheduler. Note the load average; it happily wraps.
top - 22:34:02 up 8 min, 0 users, load average: 615.32, 746.30, 929.15 Tasks: 3379 total, 3336 running, 43 sleeping, 0 stopped, 0 zombie Cpu(s): 8.8% user, 21.1% system, 10.0% nice, 56.5% idle, 3.6% IO-wait Mem: 499480k total, 414640k used, 84840k free, 1956k buffers Swap: 1020088k total, 0k used, 1020088k free, 8296k cached
PID PR NI VIRT RES SHR SWAP nFLT nDRT WCHAN S %CPU TIME+ Command 614 39 0 3668 2712 720 956 5 0 rest_init R 1.9 0:09.70 top 845 23 0 3056 1780 932 1276 0 0 wait S 0.0 0:01.96 sh 1 20 0 1440 504 444 936 14 0 rest_init S 0.0 0:00.76 init 4180 28 0 3664 2640 652 1024 0 0 rest_init R 3.5 0:00.40 top 863 39 19 1584 488 412 1096 0 0 rest_init R 0.0 0:00.30 ping 929 39 19 1584 488 412 1096 0 0 rest_init R 0.2 0:00.29 ping 871 39 19 1584 488 412 1096 0 0 rest_init R 0.2 0:00.28 ping 904 39 19 1584 488 412 1096 0 0 rest_init R 0.2 0:00.28 ping 946 39 19 1584 488 412 1096 0 0 rest_init R 0.2 0:00.28 ping 947 39 19 1584 488 412 1096 0 0 rest_init R 0.2 0:00.28 ping 972 39 19 1584 488 412 1096 0 0 rest_init R 0.0 0:00.28 ping 862 39 19 1584 488 412 1096 0 0 rest_init R 0.0 0:00.27 ping 881 39 19 1584 488 412 1096 0 0 rest_init R 0.0 0:00.27 ping 901 39 19 1584 488 412 1096 0 0 rest_init R 0.0 0:00.27 ping 915 39 19 1584 488 412 1096 0 0 rest_init R 0.0 0:00.27 ping 923 39 19 1584 488 412 1096 0 0 rest_init R 0.0 0:00.27 ping 926 39 19 1584 488 412 1096 0 0 rest_init R 0.0 0:00.27 ping 958 39 19 1584 488 412 1096 0 0 rest_init R 0.0 0:00.27 ping 967 39 19 1584 488 412 1096 0 0 rest_init R 0.0 0:00.27 ping 987 39 19 1584 488 412 1096 0 0 rest_init R 0.0 0:00.27 ping 994 39 19 1584 488 412 1096 0 0 rest_init R 0.2 0:00.27 ping
Thanks!
-- Al
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