RE: [Vserver] Vserver CPU limit question
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: 000202020110 BCaps: 354c24ff CCaps: 0101 Ticks: 0 -bash-2.05b# cat /proc/virtual/3/status UseCnt: 9 Tasks: 3 Flags: 000202020110 BCaps: 354c24ff CCaps: 0101 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 %MEMTIME+ 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: 000202020210 ~~ http://linux-vserver.org/Capabilities_and_Flags 0100 sched_hard 0200 sched_prio so you haven't enabled sched_hard here, which explains why you do not see hard scheduling behaviour :) HTC, Herbert BCaps: 354c24ff CCaps: 0101 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 %MEMTIME+ 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/000:00:00 bash 6513 2 APP1 pts/000:03:01 exceed_cpu_limi 6616 3 APP2 pts/000:02:40 exceed_cpu_limi 7655 1 ALL_PROC pts/000:00:00 vps 7656 1 ALL_PROC pts/000:00:00 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
Re: [Vserver] Vserver CPU limit question
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 %MEMTIME+ 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 ... 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: 000202020110 BCaps: 354c24ff CCaps: 0101 Ticks: 0 -bash-2.05b# cat /proc/virtual/3/status UseCnt: 9 Tasks: 3 Flags: 000202020110 BCaps: 354c24ff CCaps: 0101 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 %MEMTIME+ 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: 000202020210 ~~ http://linux-vserver.org/Capabilities_and_Flags 0100 sched_hard 0200 sched_prio so you haven't enabled sched_hard here, which explains why you do not see hard scheduling behaviour :) HTC, Herbert BCaps: 354c24ff CCaps: 0101 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
Re: [Vserver] Vserver CPU limit question
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 %MEMTIME+ 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 %MEMTIME+ 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: 000202020110 BCaps: 354c24ff CCaps: 0101 Ticks: 0 -bash-2.05b# cat /proc/virtual/3/status UseCnt: 9 Tasks: 3 Flags: 000202020110 BCaps: 354c24ff CCaps: 0101 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 %MEMTIME+ 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: 000202020210 ~~ http://linux-vserver.org/Capabilities_and_Flags 0100 sched_hard 0200 sched_prio so you haven't enabled sched_hard here, which explains why you do not see hard scheduling behaviour :) HTC, Herbert BCaps: 354c24ff CCaps: 0101 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
RE: [Vserver] Vserver CPU limit question
Thanks Herbert, I am double checking what is up with my setup! -Albert -Original Message- From: Herbert Poetzl [mailto:[EMAIL PROTECTED] Sent: Monday, March 19, 2007 4:57 PM To: Albert Mak (almak); vserver@list.linux-vserver.org Subject: Re: [Vserver] Vserver CPU limit question 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 %MEMTIME+ 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 %MEMTIME+ 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: 000202020110 BCaps: 354c24ff CCaps: 0101 Ticks: 0 -bash-2.05b# cat /proc/virtual/3/status UseCnt: 9 Tasks: 3 Flags: 000202020110 BCaps: 354c24ff CCaps: 0101 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 %MEMTIME+ 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: 000202020210 ~~ http://linux-vserver.org/Capabilities_and_Flags 0100 sched_hard 0200 sched_prio so you haven't enabled sched_hard here, which explains why you do not see hard scheduling behaviour :) HTC, Herbert BCaps: 354c24ff CCaps: 0101 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
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: 000202020210 ~~ http://linux-vserver.org/Capabilities_and_Flags 0100 sched_hard 0200 sched_prio so you haven't enabled sched_hard here, which explains why you do not see hard scheduling behaviour :) HTC, Herbert BCaps: 354c24ff CCaps: 0101 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 %MEMTIME+ 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/000:00:00 bash 6513 2 APP1 pts/000:03:01 exceed_cpu_limi 6616 3 APP2 pts/000:02:40 exceed_cpu_limi 7655 1 ALL_PROC pts/000:00:00 vps 7656 1 ALL_PROC pts/000:00:00 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
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 %MEMTIME+ 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/000:00:00 bash 6513 2 APP1 pts/000:03:01 exceed_cpu_limi 6616 3 APP2 pts/000:02:40 exceed_cpu_limi 7655 1 ALL_PROC pts/000:00:00 vps 7656 1 ALL_PROC pts/000:00:00 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
RE: [Vserver] Vserver CPU limit question
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: 000202020210 BCaps: 354c24ff CCaps: 0101 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 %MEMTIME+ 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/000:00:00 bash 6513 2 APP1 pts/000:03:01 exceed_cpu_limi 6616 3 APP2 pts/000:02:40 exceed_cpu_limi 7655 1 ALL_PROC pts/000:00:00 vps 7656 1 ALL_PROC pts/000:00:00 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
