AK-1 · index term
gpu
2 notes carry this term. Full index →
| AN | Date | Change | Category | min |
|---|---|---|---|---|
| 006 | NVLink-C2C Removes the Copy, Not the Synchronization The CUDA Programming Guide assumes the host and the device keep separate memories with a copy between them. My DGX Spark doesn't. So I went and learned what NVLink-C2C actually is compared to PCIe, how coherence behaves across it, and what that changes for someone writing C++ on this machine. | systems | 13 | |
| 005 | CUDA Performance, Part 1: Device Busy Is Not GPU Busy A program can report 98.8% device utilization while leaving its compute units idle 39% of the time. This is what I learned building a TUI for nsys timelines, and why the second number is the only one that matters. | systems | 11 |