L2 API are for users who has certain understanding of HLS and programming on FPGAs and want to make modification on kernels.
These APIs are more Vitis flow based designs in which communication and data transfer happens between kernel and host. Kernel works on data and output sent back to the host. The optimized kernel with best kernel performance that can be seen.
By default, GZIP supports a 32 KB block size. But in your library, multiple block sizes are supported namely, 8 KB and 16 KB. Not only multiple block sizes but the data compression library has both dynamic and static Huffman modules which are optimized to give good performance.
| Architecture | Compression Ratio | Throughput | FMax | LUT | BRAM | URAM |
|---|---|---|---|---|---|---|
| GZipc 32KB Compress Stream | 2.70 | 2.0 Gb/s | 300 MHz | 54K | 141 | 64 | |||
| GZip 8KB Compress Stream | 2.70 | 2.0 Gb/s | 300 MHz | 57.5K | 100 | 48 | |||
| GZip 16KB Compress Stream | 2.70 | 2.0 Gb/s | 282 MHz | 58K | 164 | 48 | |||
| Gzipc_block_mm32KB | 2.70 | 2.0 Gb/s | 300 MHz | 57K | 135 | 64 | |||
| Gzipc_static32KB | 2.70 | 2.0 Gb/s | 300 MHz | 35K | 45 | 64 | |||
Library designs supports Free-Running-Kernel and Memory-Mapped kernels.
GZip/Zlib Memory Mapped and GZip/Zlib Compress Stream: Supports Dynamic Huffman.
GZip/Zlib Streaming: Full standard support (Dynamic Huffman, Fixed Huffman and Stored Blocks supported)