SuperMicro i7 (UP) - very slow performance

[Bryce]

On Sep 22, 3:43 am, free... at jdc.parodius.com (Jeremy Chadwick) wrote:
> On Wed, Sep 22, 2010 at 03:30:33AM -0500, Adam Vande More wrote:
> > On Wed, Sep 22, 2010 at 3:12 AM, Peter Jeremy <peterjer... at acm.org> wrote:
>
> > > I think something is badly wrong here.  That's less than 1/2 the speed
> > > of my Athlon 4850e (2.5GHz) and only 60% more than my Atom N270.  None
> > > of the other figures you posted look anomolous.  Are you sure the CPU
> > > is actually running at full speed and you haven't done something like
> > > disable the caches in BIOS?
>
> > FWIW:
>
> > FreeBSD galacticdominator.com 8.1-PRERELEASE FreeBSD 8.1-PRERELEASE #1: Sun
> > Jun 20 21:05:37 CDT 2010
> > a... at galacticdominator.com:/usr/obj/usr/src/sys/GENERIC
> > amd64
> > CPU: Intel(R) Core(TM) i7 CPU         870  @ 2.93GHz (2940.64-MHz K8-class
> > CPU)
>
> > MD5 time trial. Digesting 100000 10000-byte blocks ... done
> > Digest = 766a2bb5d24bddae466c572bcabca3ee
> > Time = 2.012719 seconds
> > Speed = 496840352.000000 bytes/second
>
> > vmstat
> > -i
>
> > interrupt                          total
> > rate
>
> > irq16: vgapci0+                 10720642         54
> > irq18: fwohci0                         2          0
> > irq23: ehci1                      623712          3
> > cpu0: timer                    393496151       1996
> > irq256: hdac0                    8063581         40
> > irq257: re0                      4136265         20
> > irq259: ahci1                    1925783          9
> > cpu1: timer                    393494902       1996
> > cpu6: timer                    393494606       1996
> > cpu5: timer                    393494653       1996
> > cpu7: timer                    393494701       1996
> > cpu4: timer                    393494785       1996
> > cpu3: timer                    393494732       1996
> > cpu2: timer                    393494404       1996
> > Total                         3173428919      16102
>
> > His interrupts seem high compared to this setup, but I don't what expected
> > values should be.
>
> How are his interrupt rates "higher" than yours?  If you're focused on
> the cpuX entries, don't be.
>
> To the OP:
>
> 1) I don't see how/why USB Legacy support would have anything to do with
> your problem (meaning: you stated that things "improved a little" if you
> disabled USB Legacy support in the BIOS, which makes no sense given what
> that option does).

The machine runs *MUCH* slower if Legacy BIOS is not disabled.  Just
booting up is excruciating, and takes forever.

>
> 2) There's been a discussion on -stable about FreeBSD incorrectly
> determining different kinds of CPU characteristics on newer processors
> like the i7, with HTT in use.  I can dig up the thread if you'd like.
> It does include a patch.

Yes, I'd like that.  In case this helps:

kern.sched.topology_spec: <groups>
 <group level="1" cache-level="0">
  <cpu count="8" mask="0xff">0, 1, 2, 3, 4, 5, 6, 7</cpu>
  <children>
   <group level="3" cache-level="2">
    <cpu count="8" mask="0xff">0, 1, 2, 3, 4, 5, 6, 7</cpu>
    <children>
     <group level="5" cache-level="1">
      <cpu count="2" mask="0x3">0, 1</cpu>
      <flags><flag name="THREAD">THREAD group</flag><flag
name="SMT">SMT group</flag></flags>
     </group>
     <group level="5" cache-level="1">
      <cpu count="2" mask="0xc">2, 3</cpu>
      <flags><flag name="THREAD">THREAD group</flag><flag
name="SMT">SMT group</flag></flags>
     </group>
     <group level="5" cache-level="1">
      <cpu count="2" mask="0x30">4, 5</cpu>
      <flags><flag name="THREAD">THREAD group</flag><flag
name="SMT">SMT group</flag></flags>
     </group>
     <group level="5" cache-level="1">
      <cpu count="2" mask="0xc0">6, 7</cpu>
      <flags><flag name="THREAD">THREAD group</flag><flag
name="SMT">SMT group</flag></flags>
     </group>
    </children>
   </group>
  </children>
 </group>
</groups>

>
> 3) Reset the BIOS settings to Factory Defaults ("Load Setup Defaults"
> or the like), and then write down whatever you change, then post the
> changes here.

After resetting BIOS, I make the following changes:

- Disable Legacy BIOS
- Change drive controller from enhanced mode to AHCI

and for your #4,  the temp is almost always between 49-60 degrees C
and the cpu freq is always 2801.

>
> --
> | Jeremy Chadwick                                   j... at parodius.com |
> | Parodius Networking                      http://www.parodius.com/|
> | UNIX Systems Administrator                  Mountain View, CA, USA |
> | Making life hard for others since 1977.              PGP: 4BD6C0CB |
>
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I am not running powerd as I saw odd behavior and wanted to get a know
good before introducing other variables.

::Bryce::