From a4d888857ede39a8e2aa5f961048c6362d3a5377 Mon Sep 17 00:00:00 2001 From: Jay Satiro Date: Wed, 16 Nov 2016 02:55:30 -0500 Subject: [PATCH] http2: Use huge HTTP/2 windows - Improve performance by using a huge HTTP/2 window size. Bug: https://github.com/curl/curl/issues/1102 Reported-by: afrind@users.noreply.github.com Assisted-by: Tatsuhiro Tsujikawa --- docs/TODO | 8 -------- lib/http2.c | 15 +++++++++++++-- 2 files changed, 13 insertions(+), 10 deletions(-) diff --git a/docs/TODO b/docs/TODO index c3bc4eb55..99c610fe9 100644 --- a/docs/TODO +++ b/docs/TODO @@ -63,7 +63,6 @@ 5.1 Better persistency for HTTP 1.0 5.2 support FF3 sqlite cookie files 5.3 Rearrange request header order - 5.4 Use huge HTTP/2 windows 5.5 auth= in URLs 5.6 Refuse "downgrade" redirects 5.7 Brotli compression @@ -528,13 +527,6 @@ This is not detailed in any FTP specification. headers use a default value so only headers that need to be moved have to be specified. -5.4 Use huge HTTP/2 windows - - We're currently using nghttp2's default window size which is terribly small - (64K). This becomes a bottle neck over high bandwidth networks. We should - instead make the window size to be very big (512MB?) as we really don't do - much flow control anyway. - 5.5 auth= in URLs Add the ability to specify the preferred authentication mechanism to use by diff --git a/lib/http2.c b/lib/http2.c index 6720984b0..202ab1b5d 100644 --- a/lib/http2.c +++ b/lib/http2.c @@ -59,6 +59,8 @@ #define nghttp2_session_callbacks_set_error_callback(x,y) #endif +#define HTTP2_HUGE_WINDOW_SIZE (1 << 30) + /* * Curl_http2_init_state() is called when the easy handle is created and * allows for HTTP/2 specific init of state. @@ -965,7 +967,7 @@ static ssize_t data_source_read_callback(nghttp2_session *session, */ static nghttp2_settings_entry settings[] = { { NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 100 }, - { NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, NGHTTP2_INITIAL_WINDOW_SIZE }, + { NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, HTTP2_HUGE_WINDOW_SIZE }, }; #define H2_BUFSIZE 32768 @@ -2031,7 +2033,8 @@ CURLcode Curl_http2_switched(struct connectdata *conn, else { /* stream ID is unknown at this point */ stream->stream_id = -1; - rv = nghttp2_submit_settings(httpc->h2, NGHTTP2_FLAG_NONE, NULL, 0); + rv = nghttp2_submit_settings(httpc->h2, NGHTTP2_FLAG_NONE, settings, + sizeof(settings) / sizeof(settings[0])); if(rv != 0) { failf(data, "nghttp2_submit_settings() failed: %s(%d)", nghttp2_strerror(rv), rv); @@ -2039,6 +2042,14 @@ CURLcode Curl_http2_switched(struct connectdata *conn, } } + rv = nghttp2_session_set_local_window_size(httpc->h2, NGHTTP2_FLAG_NONE, 0, + HTTP2_HUGE_WINDOW_SIZE); + if(rv != 0) { + failf(data, "nghttp2_session_set_local_window_size() failed: %s(%d)", + nghttp2_strerror(rv), rv); + return CURLE_HTTP2; + } + /* we are going to copy mem to httpc->inbuf. This is required since mem is part of buffer pointed by stream->mem, and callbacks called by nghttp2_session_mem_recv() will write stream specific