On (05/31/16 21:20), Sergey Senozhatsky wrote:
> This has started as a 'add zlib support' work, but after some
> thinking I saw no blockers for a bigger change -- a switch to
> crypto API.
>
> We don't have an idle zstreams list anymore and our write path
> now works absolutely differently, preventing preemption during
> compression. This removes possibilities of read paths preempting
> writes at wrong places and opens the door for a move from custom
> LZO/LZ4 compression backends implementation to a more generic one,
> using crypto compress API.
>
> This patch set also eliminates the need of a new context-less
> crypto API interface, which was quite hard to sell, so we can
> move along faster.
forgot to attach some benchmarks:
(x86_64, 4GB, zram-perf script)
perf reported run-time fio (max jobs=3)
test-fio-zram-842
197.907655282 seconds time elapsed
201.623142884 seconds time elapsed
226.854291345 seconds time elapsed
test-fio-zram-DEFLATE
253.259516155 seconds time elapsed
258.148563401 seconds time elapsed
290.251909365 seconds time elapsed
test-fio-zram-LZ4
27.022598717 seconds time elapsed
29.580522717 seconds time elapsed
33.293463430 seconds time elapsed
test-fio-zram-LZ4HC
56.393954615 seconds time elapsed
74.904659747 seconds time elapsed
101.940998564 seconds time elapsed
test-fio-zram-LZO
28.155948075 seconds time elapsed
30.390036330 seconds time elapsed
34.455773159 seconds time elapsed
zram mm_stat-s (max fio jobs=3)
test-fio-zram-842
mm_stat (jobs1): 3221225472 673185792 690266112 0 690266112 0
0
mm_stat (jobs2): 3221225472 673185792 690266112 0 690266112 0
0
mm_stat (jobs3): 3221225472 673185792 690266112 0 690266112 0
0
test-fio-zram-DEFLATE
mm_stat (jobs1): 3221225472 24379392 37761024 0 37761024 0
0
mm_stat (jobs2): 3221225472 24379392 37761024 0 37761024 0
0
mm_stat (jobs3): 3221225472 24379392 37761024 0 37761024 0
0
test-fio-zram-LZ4
mm_stat (jobs1): 3221225472 23592960 37761024 0 37761024 0
0
mm_stat (jobs2): 3221225472 23592960 37761024 0 37761024 0
0
mm_stat (jobs3): 3221225472 23592960 37761024 0 37761024 0
0
test-fio-zram-LZ4HC
mm_stat (jobs1): 3221225472 23592960 37761024 0 37761024 0
0
mm_stat (jobs2): 3221225472 23592960 37761024 0 37761024 0
0
mm_stat (jobs3): 3221225472 23592960 37761024 0 37761024 0
0
test-fio-zram-LZO
mm_stat (jobs1): 3221225472 34603008 50335744 0 50335744 0
0
mm_stat (jobs2): 3221225472 34603008 50335744 0 50335744 0
0
mm_stat (jobs3): 3221225472 34603008 50335744 0 50339840 0
0
-ss
