Messages in this thread |  | | Date | Fri, 11 May 2001 16:41:25 +0100 (BST) | From | Mark Hemment <> | Subject | Re: nasty SCSI performance drop-outs (potential test case) |
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On Fri, 11 May 2001, null wrote: > Time to mkfs the same two 5GB LUNs in parallel is 54 seconds. Hmmm. > Bandwidth on two CPUs is totally consumed (99.9%) and a third CPU is > usually consumed by the kupdated process. Activity lights on the storage > device are mostly idle during this time.
I see you've got 1.2GBytes, so are using HIGHMEM support?
I sumbitted a patch a few weeks back, against the buffer cache, which makes it behave better with HIGHMEM. The patch improved the time take to create large filesystems.
This got picked up by Alan in his -ac series. Can't remember exactly when Alan merged it, but it is definitely in 2.4.4-ac3. I'd recommend giving it a try.
Mark
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