Messages in this thread |  | | Date | Sat, 29 Sep 2001 08:53:23 -0700 | From | Phil Blecker <> | Subject | Re: 2.4.9-ac10 IDE access slows as uptime increases |
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DB uses regular file system (ext3) and mmap. Nothing in logs from IDE. Only thing there unknown to me from kernel: cmpci: dma timed out?? That's from the sound driver, apparently. No idea what it means. By the way, would hdparm -i report the change? If so, they're all still UDMA. I'm going to try removing the IDE to SCSI stuff that I installed to try and get a USB CDRW drive working. Never did, and have not used any time to pursue it (always timed out on access, now not even in devfs for some reason). No idea if that's relevant, either, but it looks like something I botched.
The last message was so long that this may have been missed: it's not just the DB that shows the slowdown. It's general. It's just really obvious with the DB due to visual feedback. Who would notice if gcc-3 took an extra 20 minutes to compile something ;( (I haven't really timed it. I noticed gcc gets slower, but not timed it to see how much, so its subjective.)
This may be irrelevant, but here's meminfo this morning: total: used: free: shared: buffers: cached: Mem: 1053401088 887148544 166252544 65536 242728960 552976384 Swap: 2147467264 74866688 2072600576 MemTotal: 1028712 kB MemFree: 162356 kB MemShared: 64 kB Buffers: 237040 kB Cached: 478604 kB SwapCached: 61412 kB Active: 421960 kB Inact_dirty: 352208 kB Inact_clean: 2952 kB Inact_target: 260 kB HighTotal: 130992 kB HighFree: 2036 kB LowTotal: 897720 kB LowFree: 160320 kB SwapTotal: 2097136 kB SwapFree: 2024024 kB
On Sat, Sep 29, 2001 at 03:33:17PM +0100, Alan Cox wrote: > > I ran a program that's a GUI app/front-end to a data base, on the > > local drives. It took seconds to access a record. > > Is the data base doing I/O directly to a block device and not using > O_DIRECT for one question > > Second question is what is in your IDE logs. The IDE layer will change > down speeds when it hits a repeated problem (eg a DMA timeout) so if > need be will switch back to PIO or to MWDMA. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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