Messages in this thread |  | | Date | Wed, 6 Feb 2002 16:34:20 -0500 | Subject | Re: [PATCH] Radix-tree pagecache for 2.5 | From | rwhron@earthlin ... |
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On Wed, Feb 06, 2002 at 09:44:33AM -0200, Rik van Riel wrote: > Once you get over 'dbench 16' or so the whole thing basically > becomes an excercise in how well the system can trigger task > starvation in get_request_wait.
It's neat you've identified that bottleneck.
dbench 192 also appears to trigger more swapin/swapout than usual with rmap based kernels about 12-15 minutes into the test; and it remains unusually high for the duration of the run. (not a huge amount of swapping, but vmstat 60 shows double digit numbers, rather than the more typical 0 with occasional single digits "spikes"). dbench 64 doesn't trigger this behavior on my test box.
I want diversity in the workloads. bonnie++ does a single thread, and tiobench is doing 1, 2, 4, and 8 threads. dbench fits in well at the other end of the spectrum.
The newest bench added to the lineup is OSDB on postgresql. If everything executes properly, 2.5.3-dj3 (which includes radix-tree) will win the first timer award for OSDB. :)
-- Randy Hron
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