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Diffstat (limited to 'benchmarks/bonnie/DESCR')
| -rw-r--r-- | benchmarks/bonnie/DESCR | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/benchmarks/bonnie/DESCR b/benchmarks/bonnie/DESCR new file mode 100644 index 00000000000..b93807f2ffc --- /dev/null +++ b/benchmarks/bonnie/DESCR @@ -0,0 +1,17 @@ +Bonnie: Filesystem Benchmark Program + +Bonnie tests the speed of file I/O using standard C library calls. +It does reads and writes of blocks, testing for the limit of sustained +data rate (usually limited by the drive or controller) and updates on +a file (better simulating normal operating conditions and quite dependent +on drive and OS optimisations). +The per character read and write tests are generally limited by CPU speed +only on current generation hardware. It takes some 35 SPECint92 to read +or write a file at a rate of 1MB/s using getc() and putc(). +The seek tests are dependent on the buffer cache size, since the fraction +of disk blocks that fits into the buffer cache will be found without any +disk operation and will contribute zero seek time readings. I.e. if the +buffer cache is 16MB and the Bonnie test file is 32MB in size, then the +seek time will come out as half its real value. The seek time includes +rotational delay, and will thus always come out higher than specified for +a drive. |