Qualcomm Snapdragon
Qualcomm QSD8250 (Snapdragon) 1024 MHz (65 nm) - HTC HD2
- L1 Data Cache = 32 KB. 32 B/line.
- L2 Cache = 256 KB. 128 B/line.
- Data L1 TLB size = 8 items.
- Data L2 TLB size = 64 items.
- Pipeline: 13 stages for load/store instructions, 10-12 stages for simple integer instructions.
4 KB pages mode
Size |
Latency |
Description |
32 K | 4 | L1 TLB + L1 |
256 K | 26 | + 17 (L1 miss -> L2 hit) + 5 (L1-TLB miss) |
... | 41 + 215 ns | + 15 (L2-TLB miss) + 215 ns (RAM) |
- L2 Read B/W (32 Bytes stride) = 10 cycles per 32-byte cache line
- RAM Read B/W (4 Bytes stride) = 300 MB/s
- RAM Read B/W (128 Bytes stride) = 920 MB/s
- RAM Read B/W (parallel random read) = 830 MB/s (128 byte cache line)
- RAM Write B/W (4 - 16 Bytes stride) = 780 MB/s (Probably combining, No write allocate)
Links
Qualcomm Snapdragon at Wikipedia
TWO-HEADED SNAPDRAGON TAKES FLIGHT