diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/http/modules/ngx_http_gzip_filter_module.c | 38 |
1 files changed, 33 insertions, 5 deletions
diff --git a/src/http/modules/ngx_http_gzip_filter_module.c b/src/http/modules/ngx_http_gzip_filter_module.c index 73b6d89be..e4c343c9b 100644 --- a/src/http/modules/ngx_http_gzip_filter_module.c +++ b/src/http/modules/ngx_http_gzip_filter_module.c @@ -57,6 +57,7 @@ typedef struct { unsigned nomem:1; unsigned gzheader:1; unsigned buffering:1; + unsigned intel:1; size_t zin; size_t zout; @@ -233,6 +234,8 @@ static ngx_str_t ngx_http_gzip_ratio = ngx_string("gzip_ratio"); static ngx_http_output_header_filter_pt ngx_http_next_header_filter; static ngx_http_output_body_filter_pt ngx_http_next_body_filter; +static ngx_uint_t ngx_http_gzip_assume_intel; + static ngx_int_t ngx_http_gzip_header_filter(ngx_http_request_t *r) @@ -527,7 +530,27 @@ ngx_http_gzip_filter_memory(ngx_http_request_t *r, ngx_http_gzip_ctx_t *ctx) * *) 5920 bytes on amd64 and sparc64 */ - ctx->allocated = 8192 + (1 << (wbits + 2)) + (1 << (memlevel + 9)); + if (!ngx_http_gzip_assume_intel) { + ctx->allocated = 8192 + (1 << (wbits + 2)) + (1 << (memlevel + 9)); + + } else { + /* + * A zlib variant from Intel, https://github.com/jtkukunas/zlib. + * It can force window bits to 13 for fast compression level, + * on processors with SSE 4.2 it uses 64K hash instead of scaling + * it from the specified memory level, and also introduces + * 16-byte padding in one out of the two window-sized buffers. + */ + + if (conf->level == 1) { + wbits = ngx_max(wbits, 13); + } + + ctx->allocated = 8192 + 16 + (1 << (wbits + 2)) + + (1 << (ngx_max(memlevel, 8) + 8)) + + (1 << (memlevel + 8)); + ctx->intel = 1; + } } @@ -1003,7 +1026,7 @@ ngx_http_gzip_filter_alloc(void *opaque, u_int items, u_int size) alloc = items * size; - if (alloc % 512 != 0 && alloc < 8192) { + if (items == 1 && alloc % 512 != 0 && alloc < 8192) { /* * The zlib deflate_state allocation, it takes about 6K, @@ -1025,9 +1048,14 @@ ngx_http_gzip_filter_alloc(void *opaque, u_int items, u_int size) return p; } - ngx_log_error(NGX_LOG_ALERT, ctx->request->connection->log, 0, - "gzip filter failed to use preallocated memory: %ud of %ui", - items * size, ctx->allocated); + if (ctx->intel) { + ngx_log_error(NGX_LOG_ALERT, ctx->request->connection->log, 0, + "gzip filter failed to use preallocated memory: " + "%ud of %ui", items * size, ctx->allocated); + + } else { + ngx_http_gzip_assume_intel = 1; + } p = ngx_palloc(ctx->request->pool, items * size); |