diff options
Diffstat (limited to 'searchlib/src/vespa/searchlib/bitcompression/compression.cpp')
| -rw-r--r-- | searchlib/src/vespa/searchlib/bitcompression/compression.cpp | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/searchlib/src/vespa/searchlib/bitcompression/compression.cpp b/searchlib/src/vespa/searchlib/bitcompression/compression.cpp index 0f089c60e4b..f3fc31ac8b1 100644 --- a/searchlib/src/vespa/searchlib/bitcompression/compression.cpp +++ b/searchlib/src/vespa/searchlib/bitcompression/compression.cpp @@ -359,6 +359,24 @@ getParams(PostingListParams ¶ms) const params.clear(); } +template <bool bigEndian> +void +FeatureEncodeContext<bigEndian>::pad_for_memory_map_and_flush() +{ + // Write some pad bits to avoid decompression readahead going past + // memory mapped file during search and into SIGSEGV territory. + + // First pad to 64 bits alignment. + this->smallAlign(64); + writeComprBufferIfNeeded(); + + // Then write 128 more bits. This allows for 64-bit decoding + // with a readbits that always leaves a nonzero preRead + padBits(128); + this->alignDirectIO(); + this->flush(); + writeComprBuffer(); // Also flushes slack +} template <bool bigEndian> void |