Computer Science Department

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Description:

• This is version 2.0 of a program to empirically determine some parameters about an architectures memory subsystem. Portions of it may be used an upcoming benchmark suite like ParkBench. The distribution is available here. Remember, your machine must be dead quiet to produce accurate results. I will have a poster on this at SuperComputing 97.

Features:

• NEW Added hand tuned loops via the -t option as well as memset and memcpy tests.
• NEW Configuration scripts.
• NEW Flexible data types, defaults to double instead of int.
• NEW! Better default behavior and compile options.
• 8 different tests, read, write and read/modify/write.
• Automated build test, execution and result processing.
• Generates postscript graphs using GNUplot.
• Measurement of access time in nanoseconds and bandwidth in MB/sec.
• Safe from aggressive optimizing compilers.
• Tunable run time parameters to reduce test domain.
• Completely Purified!
• Here's the README.

Usage:

Usage: cachebench -rwbtsp [-x #] [-m #] [-d #] [-e #]
         -r Read benchmark
         -w Write benchmark
         -b Read/Modify/Write benchmark
         -t Use hand tuned versions of the above
         -s memset() benchmark
         -p memcpy() benchmark
         -x Number of measurements between powers of 2.
         -m Specify the log2(available physical memory)
         -d Number of seconds per iteration
         -e Repeat count per cache size

Datatype used is double, 8 bytes.
Defaults if  tty: -rwbsp -x1 -m24 -d5 -e2
Defaults if file: -b   -x1 -m24 -d5 -e1

NEW Sample Results:

• R10000 Double - All 8

Old Overall Results:

• Origin 2000 Integer - All 3
• Origin 2000 Double - All 3
• PCA Integer - All 3
• PCA Double - All 3
• Overall - Read
• Overall - Write
• Overall - Read/Modify/Write

Old Specific Results for Reading:

• Pentium - Read
• R8000 - Read
• T3E - Read
• SP2 PPC604 - Read
• SP2 P2SC - Read
• Alpha - Read
• Ultra 2 - Read

                        Read Cache Test

C Size          Nanosec         MB/sec          % Chnge
-------         -------         -------         -------
4096            7.396           515.753         1.000
6144            7.594           502.350         1.027
8192            7.731           493.442         1.018
12288           17.578          217.015         2.274

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