Re: JFFS3 & performance

xemc
2004-12-22T20:43:47Z

If you're interested, here are some more meaningful results for an ARM
architecture (Sharp LH7A400):

# rmmod crc_test; insmod ./crc_test.ko
[crctst] 16-bit CRC CCITT 32 bytes: ts1 37059, ts2 37070, delta 11
[crctst] 16-bit CRC CCITT 4096 bytes: ts1 60342, ts2 61427, delta 1085
[crctst] 16-bit CRC CCITT 65536 bytes: ts1 31089, ts2 51127, delta 20038
[crctst] crc32 32 bytes: ts1 38319, ts2 38325, delta 6
[crctst] crc32 4096 bytes: ts1 57032, ts2 57458, delta 426
[crctst] crc32 65536 bytes: ts1 49367, ts2 58710, delta 9343
[crctst] crc32c 32 bytes: ts1 42039, ts2 42048, delta 9
[crctst] crc32c 4096 bytes: ts1 61670, ts2 62677, delta 1007
[crctst] crc32c 65536 bytes: ts1 64761, ts2 46754, delta 4294949289
[crctst] adler32 32 bytes: ts1 32352, ts2 32357, delta 5
[crctst] adler32 4096 bytes: ts1 51543, ts2 51811, delta 268
[crctst] adler32 65536 bytes: ts1 41608, ts2 48194, delta 6586
[crctst] adler32r 32 bytes: ts1 32140, ts2 32145, delta 5
[crctst] adler32r 4096 bytes: ts1 51663, ts2 51921, delta 258
[crctst] adler32r 65536 bytes: ts1 41654, ts2 47917, delta 6263
[crctst] engel32 32 bytes: ts1 32182, ts2 32188, delta 6
[crctst] engel32 4096 bytes: ts1 51549, ts2 51918, delta 369
[crctst] engel32 65536 bytes: ts1 43199, ts2 51347, delta 8148
[crctst] engel32r 32 bytes: ts1 35293, ts2 35298, delta 5
[crctst] engel32r 4096 bytes: ts1 54784, ts2 55173, delta 389
[crctst] engel32r 65536 bytes: ts1 44905, ts2 51102, delta 6197

Mike