Why is it so fast to request a data？ about gc64-hmcsim HOT 4 CLOSED

The latency to get a response back from the device depends upon the following factors:

• The configuration of the device. This includes the queue depth, number of vaults, links and number of DRAMs per device.
• The link configuration. Are you sending the request down a link that is co-located with the target vault (eg, reducing the route time across the HMC logic layer)?
• The dram latency. What are you using as the DRAM latency? The default is 2 cycles.
• The device congestion. How many requests are you sending an in what patterns? If you send a single request and there are no other requests pending, then your queuing delayed is minimized.

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Thank you very much for receiving your reply，I use the default settings for all configurations, but I have not seen where I can change Dram latency，It seems that there is no configuration that can be modified，Can you give some hints？ Thanks!

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You can set the DRAM latency using the following function:
int hmcsim_init_dram_latency( struct hmcsim_t *hmc, uint32_t latency );
...where *hmc is a pointer to an initialized HMC object and the latency value is measured in cycles.

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OK,Thank you very much!

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