XML : AIO_Stress Test for Disk Bench marking

Can anybody help me to understand the AIO-Stress Benchmark ??[ I am doing it through phoronix-test-suite]

I know that it is one of the basic disk benchmark and do random write using test file of 2GB and 64KB record Size. The Result obtained is write speed in MB/s . I want to know how the program calculates this speed? The c program for AIO-Stress test can be found here .

Also, I cannot understand the result.xml of the same [All xml defenitions for AIO-Stress can be found here]. Can anybody please help me in understanding the same? especially the part with the threads.. :(

Any help regrading this is highly appreciated. Also, Is it possible to change the test file size by changing the arguments in test-definition.xml file? Following is the result.xml

adding stage random write

dropping thread count to the number of contexts 1

starting with random write

file size 1024MB, record size 64KB, depth 64, ios per iteration 8

max io_submit 8, buffer alignment set to 4KB

threads 1 files 1 contexts 1 context offset 2MB verification off

random write on aio-test-file (#_RESULT_# MB/s) 1024.00 MB in 3.84s

thread 0 random write totals (63.36 MB/s) 1024.00 MB in 16.16s

Running single thread version