Commit graph

76 commits

Author SHA1 Message Date
Moinak Ghosh
7b7c85dab4 Rationalize XXHash implementation to deal with 32-byte blocks instead of 16-byte.
Fix XXHash performance degradation for small keys.
Modify a data analysis loop in adaptive compress to make it auto-vectorizable.
2013-01-23 20:58:39 +05:30
Moinak Ghosh
5c8704c5bb Improve Deduplication throughtput by 90%.
Use SSE4 register as sliding window for default 16-byte window size.
Use local variable for sliding window position to avoid spurios memory access in non-SIMD case.
Avoid computing breakpoint check value if processed length < minimum block length.
2013-01-22 15:54:42 +05:30
Moinak Ghosh
e9e3e1e632 Improve SSE version detection.
Add SSE4 detection.
Fix setting of some opt flags in Makefile.in.
2013-01-20 22:53:36 +05:30
Moinak Ghosh
3888c8d316 Many optimization tweaks
Optimize Rabin Deduplication and Bsdiff
Vectorize XXHash using SE4
2013-01-20 22:02:26 +05:30
Moinak Ghosh
39dbc4be43 Implement algo-specific minimum distance match for Delta Compression. 2013-01-14 13:20:07 +05:30
Moinak Ghosh
d49a088eea Fixes and performance improvements for Dedupe Delta Compression
Avoid using fingerprints in minhash computation and fix write amplification
Modify min-heap to use 64bit values
Improve bsdiff performance
Fix pointer comparison in bsdiff
Use 32bit offsets in bsdiff to reduce memory usage
Improve Zero RLE Encoder performance
Add more buffer overflow checks in Zero RLE Decoder
2013-01-13 22:04:59 +05:30
Moinak Ghosh
d9eb82e0e8 Fix numeric parsing.
Fix dedupe bug introduced in last commit.
Reset valid flag when resetting dedupe context.
Cleanup test suites.
Do not abort test suite on failure of a test case.
2013-01-03 00:27:18 +05:30
Moinak Ghosh
13d9378acd Update to latest XXHash version. 2012-12-31 11:53:47 +05:30
Moinak Ghosh
36d95276ee Further improvements to Delta2 performance.
Fix the byteswap macros.
Start adding assertions.
2012-12-28 22:12:38 +05:30
Moinak Ghosh
26a4f42506 Introduce strict compiler flags and fix scores of warnings/issues.
Avoid different optimization flags for Dedupe sources.
Fix liberal mixing of uint64_t and int64_t (should all be uint64_t).
Fix corner case crash when decompressing.
2012-12-27 23:06:48 +05:30
Moinak Ghosh
a43fdd7d2c Improve Delta2 scanning speed and effectiveness.
Add destination buffer overflow check in Delta2.
Add rough speed computation.
2012-12-23 00:44:56 +05:30
Moinak Ghosh
b0f41c2888 Add matrix transpose to Delta2 encoding.
Change confusing structure member name.
2012-12-13 21:18:16 +05:30
Moinak Ghosh
224fb529e9 Get rid of size_t in places where 64-bitness is assumed. 2012-12-09 10:15:06 +05:30
Moinak Ghosh
29b0d8fd7b Implement Adaptive Delta Encoding. 2012-12-05 00:09:47 +05:30
Moinak Ghosh
d054e0f713 Zlib optimizations. Use raw deflate streams to avoid unnecessary adler32.
Change some function signatures to improve algo init function behavior.
Fix corner case dedupe bug in error handling flow.
Bump archive version signature.
2012-11-22 21:02:50 +05:30
Moinak Ghosh
c5ebe1f30a Portability to Debian based distros.
Enable SSE4/AVX detection for AMD platforms (Bulldozer has both).
Portable long long int print formatting to silence gcc 4.6 warnings.
2012-10-21 21:03:07 +05:30
Moinak Ghosh
d13aad830e Implement HMAC Functionality.
Refactor crypto utility functions in a separate file.
Add HMAC verification for file header.
Add a few extra input validation checks.
Include space in chunk header for HMAC.
2012-10-17 23:32:35 +05:30
Moinak Ghosh
f2d7bea902 Support for chunk-level encryption using AES and Scrypt based PBE.
Couple of minor fixes.
2012-10-15 12:10:00 +05:30
Moinak Ghosh
21cbef6d60 Incorporate SSE/AVX optimized Intel SHA-256 implementation.
Add support for runtime cpuid detection.
2012-10-06 20:51:23 +05:30
Moinak Ghosh
c880b73d26 Fix typo. 2012-10-03 22:47:16 +05:30
Moinak Ghosh
2578676b1b Add support for SHA256 and SHA512 digests from OpenSSL library. 2012-10-03 22:43:02 +05:30
Moinak Ghosh
8386e72566 Rewrite core dedupe logic to simplify code and improve performance.
Hashtable based chunk-level deduplication instead of Quicksort.
Fix a corner case bug in Dedupe decompression.
2012-09-23 14:57:09 +05:30
Moinak Ghosh
e3befd9e16 Add support for Fixed-Block deduplication.
More refactoring of symbol names.
2012-09-16 11:12:58 +05:30
Moinak Ghosh
a6b3719d89 Fix conditional in heapq function. 2012-09-11 21:59:08 +05:30
Moinak Ghosh
f3f472b860 Implement K-min-values Sketch for Similarity detection. 2012-09-11 20:26:36 +05:30
Moinak Ghosh
262566b59a Add xxHash for Rabin block checksums, slightly faster than CRC64.
Fix missing initialization of character counts table.
Some file reorganization.
2012-09-02 20:40:32 +05:30