Messages in this thread | | | Date | Tue, 13 Apr 2004 00:51:11 -0700 | From | Andrew Morton <> | Subject | Re: Benchmarking objrmap under memory pressure |
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"Martin J. Bligh" <mbligh@aracnet.com> wrote: > > UP Athlon 2100+ with 512Mb of RAM. Rebooted clean before each test > then did "make clean; make vmlinux; make clean". Then I timed a > "make -j 256 vmlinux" to get some testing under mem pressure. > > I was trying to test the overhead of objrmap under memory pressure, > but it seems it's actually distinctly negative overhead - rather pleasing > really ;-) > > 2.6.5 > 225.18user 30.05system 6:33.72elapsed 64%CPU (0avgtext+0avgdata 0maxresident)k > 0inputs+0outputs (37590major+2604444minor)pagefaults 0swaps > > 2.6.5-anon_mm > 224.53user 26.00system 5:29.08elapsed 76%CPU (0avgtext+0avgdata 0maxresident)k > 0inputs+0outputs (29127major+2577211minor)pagefaults 0swaps
A four second reduction in system time caused a one minute reduction in runtime? Pull the other one ;)
Average of five runs, please...
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