Hi Herbert, I repeated the same expriment with sched_hard. The result is the same, vserver is not able to enforce the CPU limit. I am under the impression that sched_prio will also make use of the priority scheme to limit CPU utilization per Vserver context....
Thanks for your help. -Albert -bash-2.05b# cat /proc/virtual/2/status UseCnt: 9 Tasks: 3 Flags: 0000000202020110 BCaps: 00000000354c24ff CCaps: 0000000000000101 Ticks: 0 -bash-2.05b# cat /proc/virtual/3/status UseCnt: 9 Tasks: 3 Flags: 0000000202020110 BCaps: 00000000354c24ff CCaps: 0000000000000101 Ticks: 0 top - 14:02:25 up 2:34, 3 users, load average: 1.91, 0.88, 0.34 Tasks: 132 total, 3 running, 129 sleeping, 0 stopped, 0 zombie Cpu(s): 100.0% us, 0.0% sy, 0.0% ni, 0.0% id, 0.0% wa, 0.0% hi, 0.0% si Mem: 513084k total, 118572k used, 394512k free, 16704k buffers Swap: 0k total, 0k used, 0k free, 46648k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 32600 root 25 0 1336 232 184 R 49.8 0.0 1:38.31 exceed_cpu_limi 32697 root 25 0 1336 232 184 R 49.8 0.0 1:14.18 exceed_cpu_limi -bash-2.05b# cat /proc/virtual/2/sched Token: 140 FillRate: 80 Interval: 100 TokensMin: 50 TokensMax: 140 PrioBias: 0 VaVaVoom: 0 cpu 0: 127657 47 0 -bash-2.05b# cat /proc/virtual/3/sched Token: 140 FillRate: 10 Interval: 100 TokensMin: 50 TokensMax: 140 PrioBias: 0 VaVaVoom: 0 cpu 0: 113825 45 0 -----Original Message----- From: Herbert Poetzl [mailto:[EMAIL PROTECTED] Sent: Sun 3/18/2007 7:45 AM To: Albert Mak (almak) Cc: vserver@list.linux-vserver.org Subject: Re: [Vserver] Vserver CPU limit question On Sat, Mar 17, 2007 at 10:17:47PM -0700, Albert Mak (almak) wrote: > Hi Herbert > > Here is the output of /proc/virtual/2/status as requested.... Both > context 2 and 3 have the same setting. > > -bash-2.05b# cat /proc/virtual/2/status > UseCnt: 7 > Tasks: 2 > Flags: 0000000202020210 ~~~~~~~~~~ http://linux-vserver.org/Capabilities_and_Flags 0000000000000100 sched_hard 0000000000000200 sched_prio so you haven't enabled sched_hard here, which explains why you do not see hard scheduling behaviour :) HTC, Herbert > BCaps: 00000000354c24ff > CCaps: 0000000000000101 > Ticks: 0 > > Thanks. > > -Albert > -----Original Message----- > From: Herbert Poetzl [mailto:[EMAIL PROTECTED] > Sent: Saturday, March 17, 2007 11:36 AM > To: Albert Mak (almak) > Cc: vserver@list.linux-vserver.org > Subject: Re: [Vserver] Vserver CPU limit question > > On Fri, Mar 16, 2007 at 06:54:26PM -0700, Albert Mak (almak) wrote: > > Hi, > > > > I have Linux (2.6.14.3 Kernel) with Vserver 2.0.1 and testing the CPU > > limit capabilities. I have 2 vserver contexts both running CPU > > intensive app capable of using up 100% CPU, I am setting up on vserver > > > to limit 1 context to 10% CPU and the 2nd to 80% CPU, both using > flags sched_prio. > > I am seeing CPU usage split 50/50 between the 2 contexts. I repeated > > the same test using sched_hard with the same result (kernel > > VSERVER_HARDCPU config set to y). I am expecting to see at least the > > CPU usage close to the Vserver limits. > > > > Have I got the wrong settings or some other issues. Your help is > > really appreciated. > > > > -Albert > > > > top - 18:37:04 up 26 min, 1 user, load average: 2.04, 1.40, 0.62 > > Tasks: 127 total, 3 running, 124 sleeping, 0 stopped, 0 zombie > > Cpu(s): 98.7% us, 1.3% sy, 0.0% ni, 0.0% id, 0.0% wa, 0.0% hi, > > 0.0% si > > Mem: 513084k total, 115660k used, 397424k free, 10200k > buffers > > Swap: 0k total, 0k used, 0k free, 39332k > cached > > > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > > 6616 root 20 0 1332 228 184 R 49.8 0.0 2:23.12 > > exceed_cpu_limi > > 6513 root 20 0 1336 232 184 R 48.1 0.0 2:43.79 > > exceed_cpu_limi > > > > -bash-2.05b# vps > > PID CONTEXT TTY TIME CMD > > 3672 0 MAIN pts/0 00:00:00 bash > > 6513 2 APP1 pts/0 00:03:01 exceed_cpu_limi > > 6616 3 APP2 pts/0 00:02:40 exceed_cpu_limi > > 7655 1 ALL_PROC pts/0 00:00:00 vps > > 7656 1 ALL_PROC pts/0 00:00:00 ps > > > > -bash-2.05b# pwd > > /etc/vservers/APP1 > > -bash-2.05b# cat flags > > sched_prio > > you want to add sched_hard here if you want hard scheduling, the prio > scheduler will only adjust priorities according to the token buckets ... > > I'd also suggest to use a more recent kernel (and probably Linux-VServer > patch) than this one as the scheduler was enhanced quite a lot in 2.2.x > > > -bash-2.05b# cat schedule > > 80 > > 100 > > 200 > > 50 > > 140 > > dummy > > > > -bash-2.05b# pwd > > /etc/vservers/APP2 > > -bash-2.05b# cat flags > > sched_prio > > -bash-2.05b# cat schedule > > 10 > > 100 > > 200 > > 50 > > 140 > > dummy > > > > -bash-2.05b# cat /proc/virtual/2/sched > > Token: 140 > > FillRate: 1 > > Interval: 100 > > TokensMin: 50 > > TokensMax: 140 > > PrioBias: 0 > > VaVaVoom: -5 > > cpu 0: 229674 71 0 > > > > -bash-2.05b# cat /proc/virtual/3/sched > > Token: 140 > > FillRate: 10 > > Interval: 100 > > TokensMin: 50 > > TokensMax: 140 > > PrioBias: 0 > > VaVaVoom: -5 > > cpu 0: 217275 54 0 > > looks like none of the token buckets is active here, what does the > /proc/virtual/2/status show? > > TIA, > Herbert > > > _______________________________________________ > > Vserver mailing list > > Vserver@list.linux-vserver.org > > http://list.linux-vserver.org/mailman/listinfo/vserver
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