Question on Bandwidth Test Results

[Yonghao-Tan]

I have a question regarding the bandwidth test results from the following commands:

./build/dramsim3main configs/DDR4_8Gb_x8_3200.ini --stream random -c 100000
./build/dramsim3main configs/DDR4_8Gb_x8_3200.ini --stream stream -c 100000

The average bandwidth results are:

• Random Stream: 18.8373
• Sequential Stream: 16.8452

Questions:

1. Why is the average bandwidth higher for the random stream compared to the sequential stream?
2. Is the unit of the bandwidth measurement GB/s?

[zhang0x01]

I also have this question. The sequential stream should have better bandwidth, however dramsim3 shows a different result.