On Mon, Mar 19, 2007 at 11:40:01PM +0100, Herbert Poetzl wrote: > On Mon, Mar 19, 2007 at 01:52:42PM -0700, Albert Mak (almak) wrote: > > 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.... > > sounds really strange, as it is working fine here ... > (with linux-2.6.19.7-vs2.2.0-rc19) > > here is a short example how you can test it, eliminating > all possible reasons for doing something wrong > > - get and compile the vcmd tool [1] and the cpuhog [2] > - do the following incantations: > > vcmd -i 100 -BC ctx_create .flagword=^34^33^32^8 -- cpuhog > > - check the results with 'vtop' which should show something > like this: > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > > 29 root 25 0 1312 252 200 H 24.5 0.5 0:33.81 cpuhog > > 30 root 16 0 1808 900 728 R 1.5 1.6 0:14.84 top > > > by default, the CPU limit will be roughly 25% without > doing any adjustments to the token buckets ... > > also note that a working token bucket looks like this: > > FillRate: 1,1 > Interval: 4,8 > TokensMin: 6 > TokensMax: 50 > PrioBias: 0 > cpu 0: 5296 11 17101 5288 0 R- 6 6 50 1/4 1/8 0 0 > ~~~~~~ hold ticks > > I will check that with your ancient kernel and patch > version shortly ...
tested now with 2.6.14.3-vs2.0.1 ... works fine here as expected: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 22 root 25 0 1304 252 200 R 24.1 0.4 0:09.59 cpuhog 23 root 17 0 1800 896 728 R 2.5 1.5 0:02.72 top best, Herbert > HTH, > Herbert > > [1] http://vserver.13thfloor.at/Experimental/TOOLS/vcmd-0.08.tar.bz2 > [2] http://vserver.13thfloor.at/Experimental/TOOLS/cpuhog.c > > > 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 > > > _______________________________________________ > Vserver mailing list > Vserver@list.linux-vserver.org > http://list.linux-vserver.org/mailman/listinfo/vserver _______________________________________________ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
