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xbench: disk access very slow?


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I don't know why but today i realize that my osx86 are slow. Ran Xbench and got this:


Results 28.05

System Info

Xbench Version 1.3

System Version 10.4.8 (8L2127)

Physical RAM 1024 MB

Model ADP2,1

Drive Type SAMSUNG SP0822N

CPU Test 43.15

GCD Loop 76.79 4.05 Mops/sec

Floating Point Basic 67.94 1.61 Gflop/sec

vecLib FFT 22.20 732.40 Mflop/sec

Floating Point Library 50.20 8.74 Mops/sec

Thread Test 53.16

Computation 37.34 756.41 Kops/sec, 4 threads

Lock Contention 92.23 3.97 Mlocks/sec, 4 threads

Memory Test 68.58

System 52.97

Allocate 79.27 291.09 Kalloc/sec

Fill 43.71 2125.22 MB/sec

Copy 47.30 977.04 MB/sec

Stream 97.21

Copy 103.44 2136.61 MB/sec

Scale 105.05 2170.37 MB/sec

Add 91.27 1944.26 MB/sec

Triad 90.87 1943.94 MB/sec

User Interface Test 58.62

Elements 58.62 269.05 refresh/sec

Disk Test 9.56

Sequential 7.26

Uncached Write 5.82 3.57 MB/sec [4K blocks]

Uncached Write 6.34 3.59 MB/sec [256K blocks]

Uncached Read 11.44 3.35 MB/sec [4K blocks]

Uncached Read 7.47 3.75 MB/sec [256K blocks]

Random 13.97

Uncached Write 7.73 0.82 MB/sec [4K blocks]

Uncached Write 11.40 3.65 MB/sec [256K blocks]

Uncached Read 66.94 0.47 MB/sec [4K blocks]

Uncached Read 18.42 3.42 MB/sec [256K blocks]


I don't understand, before my results reaches 57. You see that disk access are too slow and dropping my overall result.


What do you guess?

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I'm getting close to solution:


At now i have:

AppleGenericPCATADriver: CMD 0x170, CTR 0x374, IRQ 15

AppleGenericPCATADriver: CMD 0x1f0, CTR 0x3f4, IRQ 14

Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/IDE0@D/AppleGenericPCATAPCIRoot/PRI0@0/AppleGenericPCATADriver/ATADeviceNub@0/IOATABlockStorageDriver/IOATABlockStorageDevice/IOBlockStorageDriver/SAMSUNG SP0822N


Before it was:

Waiting for boot volume with UUID A39EAE7C-CC76-3BE0-8F98-0450F6986DC2

Waiting on <dict ID="0"><key>IOProviderClass</key><string ID="1">IOResources</string><key>IOResourceMatch</key><string ID="2">boot-uuid-media</string></dict>

Extension "com.apple.driver.AppleOnboardPCATA" has no kernel dependency.

AppleNVIDIAnForceATA: NVIDIA nForce4 A2 (CMD 0x170, CTR 0x374, IRQ 15, BM 0xf408)

USBF: 25. 99 AppleUSBOHCI[0x1f3b000]::start OHCI controller will be unloaded across sleep

AppleNVIDIAnForceATA: NVIDIA nForce4 A2 (CMD 0x1f0, CTR 0x3f4, IRQ 14, BM 0xf400)

Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/IDE0@D/AppleOnboardPCATARoot/PRI0@0/AppleNVIDIAnForceATA/ATADeviceNub@0/IOATABlockStorageDriver/IOATABlockStorageDevice/IOBlockStorageDriver/SAMSUNG SP0822N Media/IOFDiskPartitionScheme/Untitled 1@1


I don't know what I did but realize that it was AppleNVIDIAnForceATA and now it is AppleGenericPCATA.


I'm trying to recover to nforce and can't get it.


How can I to substitute AppleGenericATA with nforce?

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