On (02/19/16 13:16), Sergey Senozhatsky wrote: > ok, this sets us on a "do we need 32 and 48 bytes classes at all" track? >
seems that lz4 defines a minimum length to be at least
61 #define COPYLENGTH 8
67 #define MINMATCH 4
70 #define MFLIMIT (COPYLENGTH + MINMATCH)
71 #define MINLENGTH (MFLIMIT + 1)
bytes.
and 32 bytes class still looks unreachable.
# cat /sys/kernel/debug/zsmalloc/zram0/classes
class size huge almost_full almost_empty obj_allocated obj_used
pages_used pages_per_zspage
0 32 0 0 0 0 0
1
1 48 26 0 31488 31259 369
3
2 64 1 0 61760 61756 965
1
3 80 2 1 2295 2253 45
1
4 96 4 0 2176 2127 51
3
5 112 1 1 1387 1358 38
2
6 128 0 1 1312 1281 41
1
7 144 1 0 1105 1086 39
3
8 160 2 2 1173 1137 46
2
9 176 4 0 1023 995 44
4
10 192 6 1 960 913 45
3
11 208 1 1 897 883 46
2
12 224 1 2 803 735 44
4
13 240 2 1 799 785 47
1
14 256 1 1 816 807 51
1
15 272 1 1 765 758 51
1
16 288 3 1 840 831 60
1
17 304 2 1 960 940 72
3
18 320 1 1 1020 999 80
4
19 336 2 0 1104 1102 92
1
20 352 4 1 1265 1247 110
2
21 368 1 1 1287 1280 117
1
22 384 2 0 1248 1242 117
3
23 400 0 0 1380 1380 138
1
24 416 1 0 1404 1403 144
4
25 432 0 0 1400 1400 150
3
26 448 1 0 1278 1277 142
1
27 464 0 2 1295 1263 148
4
28 480 4 0 1326 1319 156
2
29 496 2 2 2343 2311 284
4
30 512 0 0 1360 1360 170
1
31 528 0 3 1395 1365 180
4
32 544 2 1 1320 1306 176
2
33 560 0 1 1218 1203 168
4
34 576 0 0 1162 1162 166
1
35 592 2 1 1053 1033 156
4
36 608 2 2 1440 1424 216
3
37 624 0 1 1664 1659 256
2
38 640 1 1 1197 1186 189
3
40 672 0 2 2292 2287 382
1
42 704 3 0 2369 2365 412
4
43 720 1 1 1207 1198 213
3
44 736 1 1 1232 1227 224
2
46 768 1 2 2336 2323 438
3
49 816 0 0 3615 3615 723
1
51 848 3 1 2185 2174 460
4
52 864 1 1 1148 1141 246
3
54 896 2 2 2889 2881 642
2
57 944 2 0 3796 3794 876
3
58 960 2 0 1428 1423 336
4
62 1024 0 1 5604 5603 1401
1
66 1088 0 1 6060 6047 1616
4
67 1104 1 0 1661 1659 453
3
71 1168 2 0 6440 6438 1840
2
74 1216 4 0 5120 5115 1536
3
76 1248 4 0 3536 3531 1088
4
83 1360 0 1 15282 15281 5094
1
91 1488 3 1 17897 17887 6508
4
94 1536 3 1 5768 5762 2163
3
100 1632 3 1 10275 10270 4110
2
107 1744 1 1 11676 11673 5004
3
111 1808 3 0 6714 6711 2984
4
126 2048 0 2 27758 27756 13879
1
144 2336 0 5 32823 32807 18756
4
151 2448 3 2 9650 9642 5790
3
168 2720 0 8 13341 13326 8894
2
190 3072 0 3 7804 7799 5853
3
202 3264 2 0 255 253 204
4
254 4096 Y 0 0 636960 636960 636960
1
-ss
