I installed the patch yesterday and tested overnight, the timings I
am seeing are only slightly different from the 2.2.13 latencies.
For SCHED_FIFO tasks synchronized by signals from setitimer at
50Hz, I measure max scheduling jitter of +/- 640usec. I have stress
tested with heavy disk activity, network traffic, proc accesses, and
kernel rebuilds.
I have not tested SMP latencies. My system specs are:
Linux version 2.2.14 (root@vmebox) (gcc version egcs-2.91.66
19990314/Linux (egcs-1.1.2 release)) #1 Mon Feb 7 17:39:24 EST 2000
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : Pentium III (Katmai)
stepping : 3
cpu MHz : 498.675139
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 3
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov
pat pse36 pn mmx fxsr xmm
bogomips : 498.07
Many thanks for this very nice patch.
Wm
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