Messages in this thread | | | Date | Mon, 21 Apr 2003 21:06:03 -0700 | From | "Martin J. Bligh" <> | Subject | Re: 67-mjb2 vs 68-mjb1 (sdet degredation) |
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> Yeah, that fixes it. Ho hum ... I wonder if we can find something that > works well for both cases? I guess the options would be: > > 1. Some way to make the rwlock mechanism itself faster. > 2. Try to fix the contention itself somehow for this instance. > > Not sure if 1 is fundamentally futile or not, but would obviously be > better (more general) if it's possible ;-)
Hmmm. Actually seems like more of a "which test you pick" thing than a machine thing. Maybe it's the balance of read / write accesses to the rwlock that matters, or something.
time dd if=/dev/zero of=foo bs=1 count=1M
with backout:
real 0m4.302s user 0m0.900s sys 0m3.370s
With patch:
real 0m4.016s user 0m0.810s sys 0m3.200s
So the patch helps that test at least.
M.
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