Credit: Image courtesy of Pacific Northwest National Laboratory
Probability density for achievable performance (GFlop/s) using 1024 samples with different tiling and problem size. With eDRAM (DRAM = dynamic random-access memory), the function curve as a whole shifts to the upper right, implying that more samples can reach near-peak (for example, 90 percent) performance. In other words, having eDRAM increases the chance for less-optimized applications to reach “vendor-claimed” performance. However, the right boundary only moves a bit, indicating that eDRAM cannot significantly improve the raw peak performance.