Messages in this thread | | | Subject | Re: IO performance problems in 2.4.19-pre5 when writing to DVD-RAM/ZIP/MO | From | Moritz Franosch <> | Date | 17 Apr 2002 17:35:53 +0200 |
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> Judging from the performance regression above it would seem the > new defaults suck rocks.
I first thought that 2.4.19-pre5 would be better than 2.4.18 because vmstat showed that 2.4.19-pre5 could still read 1-2 MB per second from HDD while writing to DVD-RAM, whereas 2.4.18 blocked totally for more than 10 seconds or so. But there are short moments under both kernels (with default bdflush parameters) where you get data from HDD at a very high rate before it drops again. It seems the main throughput over a long time stems from these short moments.
> Can we please stop optimising Linux for a single workload benchmark > and start tuning it for the common case of running multiple kinds > of applications and making sure one application can't mess up the > others ? > > Personally I couldn't care less if my tar went 30% faster if it > meant having my desktop unresponsive for the whole time.
That's why I did the benchmarks in the first place, because my desktop was unresponsive while writing to DVD-RAM.
Moritz
-- Dipl.-Phys. Moritz Franosch http://Franosch.org - 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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