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in the system. A simple heuristics is used to detect what is "enough" memory: if number of physmem pages is greater than 32k (equalling 128 MB on machines with 4 kB pages). Typical immediate result of these changes is reduction in context switches and the goal is to increase efficiency by using large buffers: before: /usr/bin/time -hlp cat file1 > file2 ... 163 voluntary context switches 11194 involuntary context switches after: /usr/bin/time -hlp ./cat file1 > file2 ... 417 voluntary context switches 272 involuntary context switches Reviewed by: hackers@ (no objections to earlier version of cat patch) Approved by: gnn (mentor) MFC after: 4 months |
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cp.1 | ||
cp.c | ||
extern.h | ||
Makefile | ||
utils.c |