SuperMicro i7 (UP) - very slow performance

[Bryce]

On Sep 22, 11:43 am, smi... at nimnet.asn.au (Ian Smith) wrote:
> On Wed, 22 Sep 2010, Tom Evans wrote:
>
>  > On Wed, Sep 22, 2010 at 2:50 PM, Ian Smith <smi... at nimnet.asn.au> wrote:
>  > > It seems far more than just CPU performance is awry.  Adam's data from
>  > > his i7 shows 2.7 times Bryce's speed for the md5 -t, maybe a lower EST
>  > > rate? - but that could no way account for buildworld taking 22.5 hours.
>  > >
>  > > Recent buildworld (albeit i386) on my Thinkpad T23 ran just shy of 3.5
>  > > hours, without -j on an 1133MHz P3-M, 768MB of 133MHz RAM, 5400rpm UFS
>  > > disk - with X/KDE running meanwhile (~5-7% CPU penalty).
>  >
>  > md5 -t is quite a small benchmark, even with his misfunctioning CPU it
>  > took <6 seconds to complete.
>  >
>  > If his problem is a misapplied heatsink/fan, then his CPU could be
>  > throttling when it gets hot, the hotter it gets the more it throttles,
>  > which could explain his massive buildworld walltime. Perhaps running
>  > something like:
>  >
>  >   apply -0 "md5 -t" `jot 10`
>  >
>  > would display a notable difference.
>  >
>  > Intel chips are quite good at running without much cooling and not
>  > dieing, using thermal throttling to preserve the CPU.
>
> I guess you mean on-package, without p4tcc or ACPI throttle support?
>
> >From Bryce's original message:
>
> # Disable throttle control (and rely on EIST)
> hint.p4tcc.0.disabled="1"
> hint.acpi_throttle.0.disabled="1"
>
> which is sensible, and seems to have been applied to all CPUs, but fromhttp://www.bryce.net/files/dmesg.bootwe see for each of cpu[0-7]:
>
> est0: <Enhanced SpeedStep Frequency Control> on cpu0
> est0: Invalid id16 (set, cur) = (20, 21)
> est0: Can't check freq 2667, it may be invalid
> est0: Invalid id16 (set, cur) = (19, 21)
> est0: Can't check freq 2533, it may be invalid
> est0: Invalid id16 (set, cur) = (18, 21)
> est0: Can't check freq 2400, it may be invalid
> est0: Invalid id16 (set, cur) = (17, 21)
> est0: Can't check freq 2267, it may be invalid
> est0: Invalid id16 (set, cur) = (16, 21)
> est0: Can't check freq 2133, it may be invalid
> est0: Invalid id16 (set, cur) = (15, 21)
> est0: Can't check freq 2000, it may be invalid
> est0: Invalid id16 (set, cur) = (14, 21)
> est0: Can't check freq 1867, it may be invalid
> est0: Invalid id16 (set, cur) = (13, 21)
> est0: Can't check freq 1733, it may be invalid
> est0: Invalid id16 (set, cur) = (12, 21)
> est0: Can't check freq 1600, it may be invalid
>
> which looks a bit ominous?  What does 'sysctl hw.acpi dev.cpu' say?

hw.acpi.supported_sleep_state: S1 S4 S5
hw.acpi.power_button_state: S5
hw.acpi.sleep_button_state: S1
hw.acpi.lid_switch_state: NONE
hw.acpi.standby_state: S1
hw.acpi.suspend_state: NONE
hw.acpi.sleep_delay: 1
hw.acpi.s4bios: 0
hw.acpi.verbose: 1
hw.acpi.disable_on_reboot: 0
hw.acpi.handle_reboot: 0
hw.acpi.reset_video: 0
hw.acpi.cpu.cx_lowest: C1
dev.cpu.0.%desc: ACPI CPU
dev.cpu.0.%driver: cpu
dev.cpu.0.%location: handle=\_PR_.P001
dev.cpu.0.%pnpinfo: _HID=none _UID=0
dev.cpu.0.%parent: acpi0
dev.cpu.0.freq: 2801
dev.cpu.0.freq_levels: 2801/143000 2667/114000 2533/100000 2400/87000
2267/76000 2133/68000 2000/59000 1867/51000 1733/44000 1600/40000
dev.cpu.0.cx_supported: C1/32 C2/96 C3/128
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_usage: 100.00% 0.00% 0.00% last 372us
dev.cpu.0.temperature: 51.0C
dev.cpu.1.%desc: ACPI CPU
dev.cpu.1.%driver: cpu
dev.cpu.1.%location: handle=\_PR_.P002
dev.cpu.1.%pnpinfo: _HID=none _UID=0
dev.cpu.1.%parent: acpi0
dev.cpu.1.cx_supported: C1/32 C2/96 C3/128
dev.cpu.1.cx_lowest: C1
dev.cpu.1.cx_usage: 100.00% 0.00% 0.00% last 178us
dev.cpu.1.temperature: 51.0C
dev.cpu.2.%desc: ACPI CPU
dev.cpu.2.%driver: cpu
dev.cpu.2.%location: handle=\_PR_.P003
dev.cpu.2.%pnpinfo: _HID=none _UID=0
dev.cpu.2.%parent: acpi0
dev.cpu.2.cx_supported: C1/32 C2/96 C3/128
dev.cpu.2.cx_lowest: C1
dev.cpu.2.cx_usage: 100.00% 0.00% 0.00% last 386us
dev.cpu.2.temperature: 48.0C
dev.cpu.3.%desc: ACPI CPU
dev.cpu.3.%driver: cpu
dev.cpu.3.%location: handle=\_PR_.P004
dev.cpu.3.%pnpinfo: _HID=none _UID=0
dev.cpu.3.%parent: acpi0
dev.cpu.3.cx_supported: C1/32 C2/96 C3/128
dev.cpu.3.cx_lowest: C1
dev.cpu.3.cx_usage: 100.00% 0.00% 0.00% last 391us
dev.cpu.3.temperature: 49.0C
dev.cpu.4.%desc: ACPI CPU
dev.cpu.4.%driver: cpu
dev.cpu.4.%location: handle=\_PR_.P005
dev.cpu.4.%pnpinfo: _HID=none _UID=0
dev.cpu.4.%parent: acpi0
dev.cpu.4.cx_supported: C1/32 C2/96 C3/128
dev.cpu.4.cx_lowest: C1
dev.cpu.4.cx_usage: 100.00% 0.00% 0.00% last 413us
dev.cpu.4.temperature: 50.0C
dev.cpu.5.%desc: ACPI CPU
dev.cpu.5.%driver: cpu
dev.cpu.5.%location: handle=\_PR_.P006
dev.cpu.5.%pnpinfo: _HID=none _UID=0
dev.cpu.5.%parent: acpi0
dev.cpu.5.cx_supported: C1/32 C2/96 C3/128
dev.cpu.5.cx_lowest: C1
dev.cpu.5.cx_usage: 100.00% 0.00% 0.00% last 381us
dev.cpu.5.temperature: 51.0C
dev.cpu.6.%desc: ACPI CPU
dev.cpu.6.%driver: cpu
dev.cpu.6.%location: handle=\_PR_.P007
dev.cpu.6.%pnpinfo: _HID=none _UID=0
dev.cpu.6.%parent: acpi0
dev.cpu.6.cx_supported: C1/32 C2/96 C3/128
dev.cpu.6.cx_lowest: C1
dev.cpu.6.cx_usage: 100.00% 0.00% 0.00% last 411us
dev.cpu.6.temperature: 48.0C
dev.cpu.7.%desc: ACPI CPU
dev.cpu.7.%driver: cpu
dev.cpu.7.%location: handle=\_PR_.P008
dev.cpu.7.%pnpinfo: _HID=none _UID=0
dev.cpu.7.%parent: acpi0
dev.cpu.7.cx_supported: C1/32 C2/96 C3/128
dev.cpu.7.cx_lowest: C1
dev.cpu.7.cx_usage: 100.00% 0.00% 0.00% last 330us
dev.cpu.7.temperature: 48.0C

>
> Running multiple md5s or say 'dd if=/dev/random of=/dev/null bs=1M &'
> in a short sleep loop echoing "`date` `sysctl -n dev.cpu.0.freq` plus
> indicative coretemp sysctls might reveal something as it heats up?  
> Surprisingly (?) the dmesg shows no ACPI thermal zones (detected).


I don't think it is temperature, I have never seen temps above the low
60's C and the speed never goes down from 2.8 Ghz.  This is what I see
when running your dd for a while:

bryce at tahiti[~]>sysctl -a | grep temperature
dev.cpu.0.temperature: 55.0C
dev.cpu.1.temperature: 55.0C
dev.cpu.2.temperature: 51.0C
dev.cpu.3.temperature: 52.0C
dev.cpu.4.temperature: 59.0C
dev.cpu.5.temperature: 61.0C
dev.cpu.6.temperature: 51.0C
dev.cpu.7.temperature: 52.0C
bryce at tahiti[~]>sysctl -n dev.cpu.0.freq
2801

>
> cheers, Ian
>
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