Multi cores

[philo_neo71]

Hi,
I have intalled netBSD 6.1 on Bi quad cores Opteron 2347, when i open the system monitor i see only one cpu, i've 8 cpu, how to activate all cpu on this machine ?
I have compiled an new kernel but not changes !

Regards
Philippe

[IdOp]

system monitor seems to be gnome thing, so I'm not familiar with it, but conceivably there could be a bug with it. Could you post something more basic like the dmesg output?

[philo_neo71]

Ok,
i do the command <dmesg> and i see 8 cpus.
System monitor are bugs !

Thanks
Philippe

[IdOp]

You'e welcome, and too bad about bugs in your preferred program. I'm not sure what would be the best way to report them. Alternatively, there are likely a number of similar programs. I happen to use gkrellm. You could try digging around pkgsrc and experimenting with some.

[Oko]

Originally Posted by philo_neo71

Hi,
I have intalled netBSD 6.1 on Bi quad cores Opteron 2347, when i open the system monitor i see only one cpu, i've 8 cpu, how to activate all cpu on this machine ?
I have compiled an new kernel but not changes !

Regards
Philippe

What is a system monitor? I have never heard of it. To see the number of CPUs something like this should work (I don't use NetBSD so not 100%)

# sysctl hw.ncpu

On OpenBSD this shows you the number of CPUs seeing by kernel. Have you tried using top? On some BSDs like OpenBSD top will immediately display separately all CPUs. On some systems like OpenBSD top will display per-cpu CPU usage statistics. On some systems like FreeBSD and DragonFly BSD you will need to use switch -P

# top -P

[muflon]

Originally Posted by philo_neo71

Hi,
I have intalled netBSD 6.1 on Bi quad cores Opteron 2347, when i open the system monitor i see only one cpu, i've 8 cpu, how to activate all cpu on this machine ?
I have compiled an new kernel but not changes !

First of all; in NetBSD there is fine tool called: cpuctl [man (8) cpuctl] to control and inspect the state of CPUs in the system.

Example [1]
To list the current processors/cores;

argus# cpuctl list
Num  HwId Unbound LWPs Interrupts Last change              #Intr
---- ---- ------------ ---------- ------------------------ -----
0    0    online       intr       Fri Dec 12 10:22:27 2014 12
1    1    online       intr       Fri Dec 12 10:22:27 2014 0

Example [2]
Identification of the cpu info printed on the list of example [1]

argus# cpuctl identify 0
cpu0: Intel (686-class), 2800.22 MHz, id 0xf34
cpu0: features  0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu0: features  0xbfebfbff<PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR>
cpu0: features  0xbfebfbff<SSE,SSE2,SS,HTT,TM,SBF>
cpu0: features2 0x441d<SSE3,DTES64,MONITOR,DS-CPL,CID,xTPR>
cpu0: "Intel(R) Pentium(R) 4 CPU 2.80GHz"
cpu0: I-cache 12K uOp cache 8-way, D-cache 16KB 64B/line 8-way
cpu0: L2 cache 1MB 64B/line 8-way
cpu0: ITLB 4K/4M: 64 entries
cpu0: DTLB 4K/4M: 64 entries
cpu0: Initial APIC ID 0
cpu0: Cluster/Package ID 0
cpu0: SMT ID 0
cpu0: family 0f model 03 extfamily 00 extmodel 00 stepping 04
cpu0: UCode version: ?

Example [3]
Turning ON or OFF exact cpu/core:

argus# cpuctl list
Num  HwId Unbound LWPs Interrupts Last change              #Intr
---- ---- ------------ ---------- ------------------------ -----
0    0    online       intr       Fri Dec 12 10:22:27 2014 12
1    1    online       intr       Fri Dec 12 10:22:27 2014 0

argus# cpuctl offline 0

argus# cpuctl list

Num  HwId Unbound LWPs Interrupts Last change              #Intr
---- ---- ------------ ---------- ------------------------ -----
0    0    offline      intr       Fri Dec 12 12:37:32 2014 12
1    1    online       intr       Fri Dec 12 10:22:27 2014 0

76 processes: 1 runnable, 60 sleeping, 13 stopped, 2 on CPU
CPU0 states:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle
CPU1 states: 89.4% user,  0.0% nice, 10.2% system,  0.0% interrupt,  0.4% idle
Memory: 2227M Act, 111M Inact, 6188K Wired, 16M Exec, 2279M File, 486M Free
Swap: 3073M Total, 3073M Free

  PID USERNAME PRI NICE   SIZE   RES STATE      TIME   WCPU    CPU COMMAND
  966 root      85    0  4452K 3376K kqueue/1   1:57  0.44%  0.44% tmux
    0 root       0    0     0K   19M CPU/0      2:05  0.00%  0.00% [system]
 2415 root      43    0  3368K 1652K CPU/1      0:00  0.00%  0.00% top
24632 root      35    0    15M   10M RUN/1      0:00  0.00%  0.00% cc1
  252 root      85    0  6036K 6208K pause/1    0:00  0.00%  0.00% ntpd
18263 root      85    0    10M 4432K select/1   0:00  0.00%  0.00% sshd
 4377 root      85    0  5156K 3440K wait/1     0:00  0.00%  0.00% make

Above presentation was done on my Dell PowerEdge 750; with Pentium 4 Prescott with HT Enable, running on NetBSD 6.1_CURRENT; during compilation of qemu from pkgsrc. You can see the TOP listing; that the cpu Nr 0 is offline and it's state is 100% idle.


And; last but not least; recommendation to read an article about the Thread scheduling and related interfaces in NetBSD 5.0 written by Mindaugas Rasiukevicius.

Salute,
Marcin

[Oko]

Originally Posted by muflon

First of all; in NetBSD there is fine tool called: cpuctl [man (8) cpuctl] to control and inspect the state of CPUs in the system.

Example [1]
To list the current processors/cores;

argus# cpuctl list
Num  HwId Unbound LWPs Interrupts Last change              #Intr
---- ---- ------------ ---------- ------------------------ -----
0    0    online       intr       Fri Dec 12 10:22:27 2014 12
1    1    online       intr       Fri Dec 12 10:22:27 2014 0

Example [2]
Identification of the cpu info printed on the list of example [1]

argus# cpuctl identify 0
cpu0: Intel (686-class), 2800.22 MHz, id 0xf34
cpu0: features  0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu0: features  0xbfebfbff<PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR>
cpu0: features  0xbfebfbff<SSE,SSE2,SS,HTT,TM,SBF>
cpu0: features2 0x441d<SSE3,DTES64,MONITOR,DS-CPL,CID,xTPR>
cpu0: "Intel(R) Pentium(R) 4 CPU 2.80GHz"
cpu0: I-cache 12K uOp cache 8-way, D-cache 16KB 64B/line 8-way
cpu0: L2 cache 1MB 64B/line 8-way
cpu0: ITLB 4K/4M: 64 entries
cpu0: DTLB 4K/4M: 64 entries
cpu0: Initial APIC ID 0
cpu0: Cluster/Package ID 0
cpu0: SMT ID 0
cpu0: family 0f model 03 extfamily 00 extmodel 00 stepping 04
cpu0: UCode version: ?

Example [3]
Turning ON or OFF exact cpu/core:

argus# cpuctl list
Num  HwId Unbound LWPs Interrupts Last change              #Intr
---- ---- ------------ ---------- ------------------------ -----
0    0    online       intr       Fri Dec 12 10:22:27 2014 12
1    1    online       intr       Fri Dec 12 10:22:27 2014 0

argus# cpuctl offline 0

argus# cpuctl list

Num  HwId Unbound LWPs Interrupts Last change              #Intr
---- ---- ------------ ---------- ------------------------ -----
0    0    offline      intr       Fri Dec 12 12:37:32 2014 12
1    1    online       intr       Fri Dec 12 10:22:27 2014 0

76 processes: 1 runnable, 60 sleeping, 13 stopped, 2 on CPU
CPU0 states:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle
CPU1 states: 89.4% user,  0.0% nice, 10.2% system,  0.0% interrupt,  0.4% idle
Memory: 2227M Act, 111M Inact, 6188K Wired, 16M Exec, 2279M File, 486M Free
Swap: 3073M Total, 3073M Free

  PID USERNAME PRI NICE   SIZE   RES STATE      TIME   WCPU    CPU COMMAND
  966 root      85    0  4452K 3376K kqueue/1   1:57  0.44%  0.44% tmux
    0 root       0    0     0K   19M CPU/0      2:05  0.00%  0.00% [system]
 2415 root      43    0  3368K 1652K CPU/1      0:00  0.00%  0.00% top
24632 root      35    0    15M   10M RUN/1      0:00  0.00%  0.00% cc1
  252 root      85    0  6036K 6208K pause/1    0:00  0.00%  0.00% ntpd
18263 root      85    0    10M 4432K select/1   0:00  0.00%  0.00% sshd
 4377 root      85    0  5156K 3440K wait/1     0:00  0.00%  0.00% make

Above presentation was done on my Dell PowerEdge 750; with Pentium 4 Prescott with HT Enable, running on NetBSD 6.1_CURRENT; during compilation of qemu from pkgsrc. You can see the TOP listing; that the cpu Nr 0 is offline and it's state is 100% idle.


And; last but not least; recommendation to read an article about the Thread scheduling and related interfaces in NetBSD 5.0 written by Mindaugas Rasiukevicius.

Salute,
Marcin

Really cool post!!! I personally was not aware of this work.