Initial 6.1 questions

Danial Thom danial_thom at yahoo.com
Tue Jun 13 18:23:42 UTC 2006



--- Robert Watson <rwatson at FreeBSD.org> wrote:

> On Tue, 13 Jun 2006, Danial Thom wrote:
> 
> >> I didn't answer it because I don't know what
> output cpustat provides. What 
> >> output does cpustat provide on DragonflyBSD?
> >
> > Its a simple output such as:
> >
> > CPU-0 state:   14.00% user,   0.00% nice,  
> 2.00%
> > sys,   6.00% intr, 78.00% idle
> > CPU-1 state:   4.00% user,   0.00% nice,  
> 17.00%
> > sys,   2.00% intr, 77.00% idle
> >
> > Of course, hp-ux type output for top would be
> > ideal:
> >
> > Load averages: 0.27, 0.28, 0.28
> > 203 processes: 186 sleeping, 17 running
> > Cpu states:
> > CPU   LOAD   USER   NICE    SYS   IDLE  BLOCK
> > SWAIT   INTR   SSYS
> > 0    0.05   0.0%   0.0%   0.0% 100.0%   0.0%
> > 0.0%   0.0%   0.0%
> > 1    0.92   0.0%   0.0%   0.0% 100.0%   0.0%
> > 0.0%   0.0%   0.0%
> > 2    0.03   0.0%   0.0%   0.0% 100.0%   0.0%
> > 0.0%   0.0%   0.0%
> > 3    0.08   0.0%   0.0%   0.0% 100.0%   0.0%
> > 0.0%   0.0%   0.0%
> > ---   ----  -----  -----  -----  -----  -----
> > -----  -----  -----
> > avg   0.27   0.0%   0.0%   0.0% 100.0%   0.0%
> > 0.0%   0.0%   0.0%
> >
> > What is the plan for FreeBSD, as I don't see
> that top shows any distribution 
> > among cpus?
> 
> top displays some CPU information, especially
> with -S which shows you the 
> level of activity for the idle thread on each
> CPU.  The above looks useful, 
> and should be fairly easy to add.  I've been
> thinking about adding a few new 
> pages to systat output:
> 
> - Kernel memory allocator stats, based on
> memstat/memtop (and similar to what
>    vmstat -z and vmstat -m show).
> - CPU statistics such as the above.
> 
> I think there are some patches floating around
> already that gather per-cpu 
> cp_time measurements, but Kris has commented to
> me that they reduce 
> performance somewhat, so I'll have to
> investigate some.  That may be a caching 
> effect of some sort.

Maybe someone can explain this output. The top
line shows 99.6%idle. Is it just showing CPU 0s
stats on the top line?

last pid:   705;  load averages:  0.06,  0.02, 
0.00          up 0+00:29:36  14:22:42
69 processes:  3 running, 48 sleeping, 18 waiting
CPU states:  0.0% user,  0.0% nice,  0.4% system,
 0.0% interrupt, 99.6% idle
Mem: 8160K Active, 8108K Inact, 17M Wired, 9712K
Buf, 461M Free
Swap: 512M Total, 512M Free

  PID USERNAME  THR PRI NICE   SIZE    RES STATE 
C   TIME   WCPU COMMAND
   11 root        1 171   52     0K     8K RUN   
1  28:58 98.97% idle: cpu1
   12 root        1 171   52     0K     8K CPU0  
0  27:34 77.64% idle: cpu0
   23 root        1 -68 -187     0K     8K WAIT  
0   1:07 17.14% irq21: em1

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