You divide a dataset into b-sized blocks. You access the b-sized blocks randomly. How does your memory/disk bandwidth change depending on b? This tiny project answers that question.

• $ make

For measuring memory bandwidth. One cacheline is 64B:

• $ test mem <blockSizeInCacheLines> <totalSizeInMB>

For measuring disk bandwidth:

1. Write a temporary file:

• $ test write 0 <totalSizeInMB>

2. Drop cached pages in linux:

• $ echo 3 | sudo tee /proc/sys/vm/drop_caches

3. Read the temporary file in blocks:

• $ test disk <blockSizeInCacheLines> <totalSizeInMB>