The following is the (slightly edited) output from runs of the log-plot-cpu-rate script on the dual athlon. I'll add graphs soon (but this benchmark is still running). Note that I run all the way out to 2^25 = 32 (binary)MegaBytes in vector length. The bogomflops reported are all double precision.
Performance Summary: Excellent is all I can say. Almost 300 BOGOMFLOPS in L2 (with no significant effect visible at what I'd guess are the L1 cache boundaries) dropping off surprisingly sharply to 115 BOGOMFLOPS at the L2 boundary. Most of the other CPU's I've tested drop off more smoothly and slowly at the L2 boundary.
When I get the numbers all done I'll plot this on a comparative performance summary under the CPU-rate Summary page on brahma.
If anyone knows the numbers for the L1 cache on the processor I'd be happy to add them here. The raw /proc/cpuinfo is on the hardware description page if that is any help.
This is the output from running only a single instance of cpu-rate at a time (the other CPU idle).
#======================================================================== # # CPU-RATE 0.0.3 PLOT DATA # #======================================================================== # Double precision results #======================================================================== # HOSTNAME: dual.aslab.com (hostname not registered) # CPU Family: i686 # Motherboard: (unknown) with 2x Thunderbird, # 760MP chipset, "latest" stepping # OS Kernel: Linux 2.4.2-ac12 # CPU 0 Type: AMD Athlon(tm) Processor # CPU 0 MHz: 1196.974 MHz # CPU 0 L1 Cache Size: 64K (code)/64K (data) # CPU 0 L2 Cache Size: 256 KB # CPU 1 Type: AMD Athlon(tm) Processor # CPU 1 MHz: 1196.974 MHz # CPU 1 L1 Cache Size: 64K (code)/64K (data) # CPU 1 L2 Cache Size: 256 KB # Memory: 1029 MB of PC-2100 MHz DDR ECC memory on 266 MHz bus # More details in accompanying configuration page. # ======================================================================== # size(bytes) 10^6 ops/sec Error 8 134.90 0.036 16 284.12 0.016 32 276.26 0.022 48 248.68 24.656 56 272.18 0.021 64 274.25 0.023 72 275.56 2.082 104 244.77 0.037 128 249.32 0.027 168 253.70 0.032 256 259.02 0.031 296 259.57 0.046 512 263.34 0.050 552 263.58 0.024 1024 265.80 0.020 1064 265.76 0.019 2048 266.90 0.006 2088 267.01 0.016 4096 267.58 0.010 4136 267.60 0.012 8192 268.39 0.347 8232 268.92 0.410 16384 269.11 0.593 16424 269.90 0.620 32768 270.40 0.601 32808 270.50 0.610 65536 270.93 0.425 65576 270.53 0.485 131072 272.74 0.048 131112 272.63 0.053 262144 272.82 0.040 262184 272.84 0.040 524288 116.92 0.811 524328 116.32 0.929 1048576 115.67 0.953 1048616 114.51 0.955 2097152 114.20 0.734 2097192 114.62 0.724 4194304 115.42 0.614 4194344 115.50 0.644 8388608 115.41 0.597 8388648 115.03 0.635 16777216 115.39 0.589 16777256 115.77 0.509 33554432 115.40 0.586 33554472 115.39 0.584