Hi Allan,
FSS won't work correctly if you have a mix of processes/threads from
different scheduling classes (TS/IA/FX) in the same processor set, since
those classes use the same priority range (0-59). Might that be
happening here?
Thanks,
-Eric
Allan wrote:
> Hi,
>
> I am setting up the FSS within 3 projects, my understanding is that if I have
> project a=1 share b=2 and c=3 , then the cpu amount if there is contention
> should be c=50% b=33% and c=17%. Server is a E2900 with 8 cpus.
>
> When I run a test using the following code
>
> foreach $i (1..30) {
> $pid = fork();
> last if $pid == 0;
> print "created PID $pid\n";
> }
>
> while (1) {
> $x++;
> }
>
> Where 1..3 = project a , 1..60 for b and 1..120 for c , I would assume that I
> would hit the limits for each projects shares and see from prstat -J the
> correct limits being attained. Can you adivse wither I am looking at this
> incorrectly? or are the tests I am using flawed?
>
> prstat
> 10155 root 4048K 2480K run 41 4 0:01:45 1.1% perl/1
> 10166 root 4040K 1296K run 43 4 0:01:42 1.1% perl/1
> 10175 root 4040K 1296K run 43 4 0:01:42 1.1% perl/1
> 10171 root 4040K 1296K run 44 4 0:01:41 1.1% perl/1
> 10172 root 4040K 1296K run 44 4 0:01:43 1.1% perl/1
> 10176 root 4040K 1296K run 44 4 0:01:43 1.1% perl/1
> 10178 root 4040K 1296K run 43 4 0:01:44 1.1% perl/1
> 10156 root 4040K 1440K run 43 4 0:01:44 1.1% perl/1
> 10168 root 4040K 1296K run 43 4 0:01:41 1.1% perl/1
> 10169 root 4040K 1296K cpu9 46 4 0:01:44 1.0% perl/1
> 10167 root 4040K 1296K run 43 4 0:01:41 1.0% perl/1
> 10184 root 4040K 1296K run 43 4 0:01:43 1.0% perl/1
> 10162 root 4040K 1296K run 44 4 0:01:42 1.0% perl/1
> 10183 root 4040K 1296K run 44 4 0:01:40 1.0% perl/1
> 10179 root 4040K 1296K run 43 4 0:01:41 1.0% perl/1
> 10157 root 4040K 1296K run 46 4 0:01:44 1.0% perl/1
> 10163 root 4040K 1296K run 44 4 0:01:45 1.0% perl/1
> 10159 root 4040K 1296K run 45 4 0:01:43 1.0% perl/1
> 10165 root 4040K 1296K run 44 4 0:01:41 1.0% perl/1
> 10161 root 4040K 1296K run 45 4 0:01:44 1.0% perl/1
> 10170 root 4040K 1296K cpu513 47 4 0:01:40 1.0% perl/1
> 10181 root 4040K 1296K cpu1 45 4 0:01:41 1.0% perl/1
> 10180 root 4040K 1296K cpu523 47 4 0:01:43 1.0% perl/1
> 10164 root 4040K 1296K run 46 4 0:01:42 1.0% perl/1
> 10160 root 4040K 1296K cpu514 46 4 0:01:41 1.0% perl/1
> 10158 root 4040K 1296K cpu515 47 4 0:01:41 1.0% perl/1
> 10185 root 4040K 1296K run 45 4 0:01:41 1.0% perl/1
> 10174 root 4040K 1296K run 46 4 0:01:41 1.0% perl/1
> 10182 root 4040K 1296K run 45 4 0:01:43 1.0% perl/1
> 10173 root 4040K 1296K run 45 4 0:01:42 1.0% perl/1
> PROJID NPROC SIZE RSS MEMORY TIME CPU PROJECT
> 110 121 477M 154M 0.0% 0:47:55 34% cpu.unallocated
> 100 61 241M 79M 0.0% 0:48:01 32% cpu.spike
> 120 31 122M 41M 0.0% 0:52:51 32% allan
> 1 9 45M 26M 0.0% 0:00:17 0.0% user.root
> 0 43 478M 297M 0.4% 0:27:51 0.0% system
>
>
>
> Thanks
>
>
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