Messages in this thread | | | Date | Fri, 04 Dec 1998 15:23:48 +0000 | From | Mark Lord <> | Subject | Re: IDE-DMA strangeness (another one) |
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John Kodis wrote:
> I get a similar speed, but don't understand why. I would expect that > given a 4-byte wide bus clocked at 33MHz performing a read from cache > and a write into the destination userspace buffer, the buffer cache > read speed should be more like 66MB/s. Is there another read/write > pair that I've overlooked?
Just the CPU and memory speeds. Small details. :)
Here is a P2-400 with SDRAM:
Timing buffer-cache reads: 128 MB in 1.20 seconds =106.67 MB/sec
Sometimes it measures faster, like 124 MB/sec, depending on kernel version. -- mlord@pobox.com
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