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Subject: Re: Another memory latency test - result

Author: Gerd Isenberg

Date: 13:53:29 07/18/03

Go up one level in this thread

Hi Dieter,

dblat: 220 -  vdlat: 208  !?
Sequential access times are much higher than your's, hmm.

Gerd


AMD XP2.8 512MB DDR (no further information yet)

C:\Source\dblat\Release>dblat 300000000
Setting up a random access pattern, may take a while
Finished
Random access:  21.972 s, 219.720 ns/access
Testing same pattern again
Random access:  21.972 s, 219.720 ns/access
Setting up a different random access pattern, may take a while
Finished
Random access:  21.992 s, 219.920 ns/access
Testing same pattern again
Random access:  22.011 s, 220.110 ns/access
Sequential access offset     1:   0.560 s,   5.600 ns/access
Sequential access offset     2:   1.091 s,  10.910 ns/access
Sequential access offset     4:   2.173 s,  21.730 ns/access
Sequential access offset     8:   4.055 s,  40.550 ns/access
Sequential access offset    16:   8.081 s,  80.810 ns/access
Sequential access offset    32:   9.965 s,  99.650 ns/access
Sequential access offset    64:  10.145 s, 101.450 ns/access
Sequential access offset   128:  10.515 s, 105.150 ns/access
Sequential access offset   256:  11.266 s, 112.660 ns/access
Sequential access offset   512:  12.719 s, 127.190 ns/access
Sequential access offset  1024:  15.712 s, 157.120 ns/access
Sequential access offset  2048:  15.752 s, 157.520 ns/access
Sequential access offset  4096:  15.852 s, 158.520 ns/access
Sequential access offset  8192:  16.004 s, 160.040 ns/access
Sequential access offset    -1:   0.921 s,   9.210 ns/access
Sequential access offset    -2:   1.693 s,  16.930 ns/access
Sequential access offset    -4:   3.074 s,  30.740 ns/access
Sequential access offset    -8:   5.548 s,  55.480 ns/access
Sequential access offset   -16:   9.904 s,  99.040 ns/access
Sequential access offset   -32:   9.974 s,  99.740 ns/access
Sequential access offset   -64:  10.134 s, 101.340 ns/access
Sequential access offset  -128:  10.505 s, 105.050 ns/access
Sequential access offset  -256:  11.266 s, 112.660 ns/access
Sequential access offset  -512:  12.708 s, 127.080 ns/access
Sequential access offset -1024:  15.723 s, 157.230 ns/access
Sequential access offset -2048:  15.753 s, 157.530 ns/access
Sequential access offset -4096:  15.843 s, 158.430 ns/access
Sequential access offset -8192:  15.973 s, 159.730 ns/access

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