Messages in this thread |  | | Date | Fri, 16 Nov 2001 00:25:21 -0800 | From | Andrew Morton <> | Subject | low-latency patch for 2.4.15-pre5 |
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A low-latency scheduling patch for 2.4.15-pre4/pre5 is at
http://www.zip.com.au/~akpm/linux/schedlat.html#downloads
This is a general retune, retest and review. A couple of bugs which have crept into the patch were fixed. ext3 support is added. Certain code paths which were introduced into the kernel in the 2.4.9-2.4.11 timeframe have been addressed.
On a single 850MHz PIII with 768 megs of RAM and 1G of swap the worst case interrupt-to-activation scheduling latency is around 400 microseconds. Latencies on SMP are up to 1000 microseconds.
These measurements are across extreme workloads - peak latency across an SMP kernel build is 260 microseconds.
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