Hi Chenfeng, Sorry for the late response. If you look into src/mem/Xbar.py the width of SystemXbar is set to be 16-bytes. This means if you are running the network at 1GHz, even though your HBM can support 128 GBps (with 8 channels), the bandwidth from crossbar is 16*1 GHz = 16GBps. There might be multiple ways to solve this issue. One way is to just increase the SystemXbar width from 16-bytes to 128 bytes. Then you should be able to achieve 128 GBps.
Let me know if this helps. Thanks, Nitish On Tue, Sep 17, 2019 at 5:15 PM Zhao, Chenfeng <[email protected]> wrote: > Hi Nitish, > > I am also trying to use 8 channels of HBM to take advantage of 128Gbps > bandwidth. However, I can only get 16GBps as well. I was wondering have you > figured out how to solve this problem? > > Thanks a lot! > > Chenfeng Zhao > >
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