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Chris Frederick wrote: |
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> James Pattinson wrote: |
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> |
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>> <snip> Could some of you perhaps run hdparm -Tt on your root disk |
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>> and let me know what you get? I get great performance off the |
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>> disk but the cached read speed is about half the speed of my P4 |
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>> box: |
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>> |
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>> amd64~ # hdparm -Tt /dev/sda |
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>> |
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>> /dev/sda: Timing cached reads: 1532 MB in 2.00 seconds = |
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>> 765.95 MB/sec Timing buffered disk reads: 98 MB in 3.01 |
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>> seconds = 32.58 MB/sec |
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>> |
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>> pentium4~ # hdparm -Tt /dev/sda |
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>> |
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>> /dev/sda: Timing cached reads: 2296 MB in 2.00 seconds = |
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>> 1147.03 MB/sec Timing buffered disk reads: 44 MB in 3.02 |
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>> seconds = 14.56 MB/sec |
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> |
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> |
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> AMD64 3.0 GHz: /dev/hda: Timing cached reads: 1300 MB in 2.00 |
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> seconds = 649.45 MB/sec Timing buffered disk reads: 84 MB in |
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> 3.02 seconds = 27.80 MB/sec |
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> |
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> DUAL Zeon 2.6 GHz: /dev/hda: Timing cached reads: 2196 MB in |
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> 2.00 seconds = 1096.52 MB/sec Timing buffered disk reads: 140 MB |
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> in 3.00 seconds = 46.61 MB/sec |
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> |
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> Looks like my AMD64 setup is getting about half of my Zeon system |
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> performance. Also curious why your P4 buffered disk reads are so |
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> low compared to mine. |
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> |
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> Chris Frederick |
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> |
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Hmmm... I've only for an AMD64 3200 (Ah.. 2.2GHz Winchester core |
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socket 939)... And this is what I get. Signifcantly faster than your |
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3000. (Do you mean amd64 3000? Or a real 3GHz amd64?) |
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damned ~ # hdparm -Tt /dev/hda |
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/dev/hda: |
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Timing cached reads: 3636 MB in 2.00 seconds = 1817.89 MB/sec |
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Timing buffered disk reads: 106 MB in 3.01 seconds = 35.24 MB/sec |
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damned ~ # hdparm -Tt /dev/hdb |
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/dev/hdb: |
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Timing cached reads: 3428 MB in 2.00 seconds = 1713.89 MB/sec |
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Timing buffered disk reads: 120 MB in 3.04 seconds = 39.52 MB/sec |
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damned ~ # hdparm -Tt /dev/sda |
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/dev/sda: |
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Timing cached reads: 3200 MB in 2.00 seconds = 1599.90 MB/sec |
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Timing buffered disk reads: 164 MB in 3.00 seconds = 54.59 MB/sec |
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damned ~ # |
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