Re: Performance problem with CF card on AMD CS5536 IDE

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02-18-2008, 09:35 AM

Stuart Henderson

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Re: Performance problem with CF card on AMD CS5536 IDE

On 2008/01/17 21:47, Christian Weisgerber wrote:
> Interestingly, it doesn't change the maximum read speed for my 8 GB
> Transcend. It's still a measly ~1340 kB/s. However, the previously
> considerable CPU usage drops to almost nothing.

I didn't include my "before" speeds (or reads, I was just looking
at write speed before) - with a recent Kingston card on a net5501:

pciide0 at pci0 dev 20 function 2 "AMD CS5536 IDE" rev 0x01: DMA, channel 0 wired to compatibility, channel 1 wired to compatibility
wd0 at pciide0 channel 0 drive 1: <CF CARD 2GB>
wd0: 1-sector PIO, LBA, 1935MB, 3964464 sectors
wd0(pciide0:0:1): using PIO mode 4, DMA mode 2

KB/s write read
before 330 1400
after 5400 10551

I couldn't login to the system during testing before patching,
16x write speed and a usable system is significantly better.

> For comparison, I get some 33 MB/s out of my (4-sector) SanDisk.

A couple of those and ccd(4) should work quite nicely then :-)

« another re(4) diff for hw revision handling | Bad malo card or something else? »

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Re: Performance problem with CF card on AMD CS5536 IDE