From 6474272d13e23b1ab7156ebd20827ea1ac9c255a Mon Sep 17 00:00:00 2001 From: Craig Tiller Date: Wed, 19 Oct 2016 16:28:00 -0700 Subject: [PATCH] Eliminate extraneous variables now that initial window is 0 based --- .../chttp2/transport/chttp2_transport.c | 73 ++++++++----------- .../ext/transport/chttp2/transport/internal.h | 7 -- .../ext/transport/chttp2/transport/parsing.c | 2 - 3 files changed, 30 insertions(+), 52 deletions(-) diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c index 8e7e2e03046..cfa88af0889 100644 --- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c +++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c @@ -233,7 +233,6 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, t->is_client = is_client; t->outgoing_window = DEFAULT_WINDOW; t->incoming_window = DEFAULT_WINDOW; - t->stream_lookahead = DEFAULT_WINDOW; t->connection_window_target = DEFAULT_CONNECTION_WINDOW_TARGET; t->ping_counter = 1; t->pings.next = t->pings.prev = &t->pings; @@ -317,14 +316,6 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, t->next_stream_id = (uint32_t)value; } } - } else if (0 == strcmp(channel_args->args[i].key, - GRPC_ARG_HTTP2_STREAM_LOOKAHEAD_BYTES)) { - const grpc_integer_options options = {-1, 5, INT_MAX}; - const int value = - grpc_channel_arg_get_integer(&channel_args->args[i], options); - if (value >= 0) { - t->stream_lookahead = (uint32_t)value; - } } else if (0 == strcmp(channel_args->args[i].key, GRPC_ARG_HTTP2_HPACK_TABLE_SIZE_ENCODER)) { const grpc_integer_options options = {-1, 0, INT_MAX}; @@ -340,24 +331,26 @@ static void init_transport(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t, grpc_chttp2_setting_id setting_id; grpc_integer_options integer_options; bool availability[2] /* server, client */; - } settings_map[] = { - {GRPC_ARG_MAX_CONCURRENT_STREAMS, - GRPC_CHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, - {-1, 0, INT_MAX}, - {true, false}}, - {GRPC_ARG_HTTP2_HPACK_TABLE_SIZE_DECODER, - GRPC_CHTTP2_SETTINGS_HEADER_TABLE_SIZE, - {-1, 0, INT_MAX}, - {true, true}}, - {GRPC_ARG_MAX_METADATA_SIZE, - GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE, - {-1, 0, INT_MAX}, - {true, true}}, - {GRPC_ARG_HTTP2_MAX_FRAME_SIZE, - GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE, - {-1, 16384, 16777215}, - {true, true}}, - }; + } settings_map[] = {{GRPC_ARG_MAX_CONCURRENT_STREAMS, + GRPC_CHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, + {-1, 0, INT32_MAX}, + {true, false}}, + {GRPC_ARG_HTTP2_HPACK_TABLE_SIZE_DECODER, + GRPC_CHTTP2_SETTINGS_HEADER_TABLE_SIZE, + {-1, 0, INT32_MAX}, + {true, true}}, + {GRPC_ARG_MAX_METADATA_SIZE, + GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE, + {-1, 0, INT32_MAX}, + {true, true}}, + {GRPC_ARG_HTTP2_MAX_FRAME_SIZE, + GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE, + {-1, 16384, 16777215}, + {true, true}}, + {GRPC_ARG_HTTP2_STREAM_LOOKAHEAD_BYTES, + GRPC_CHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, + {-1, 5, INT32_MAX}, + {true, true}}}; for (j = 0; j < (int)GPR_ARRAY_SIZE(settings_map); j++) { if (0 == strcmp(channel_args->args[i].key, settings_map[j].channel_arg_name)) { @@ -774,7 +767,6 @@ void grpc_chttp2_add_incoming_goaway(grpc_exec_ctx *exec_ctx, static void maybe_start_some_streams(grpc_exec_ctx *exec_ctx, grpc_chttp2_transport *t) { grpc_chttp2_stream *s; - uint32_t stream_incoming_window; /* start streams where we have free grpc_chttp2_stream ids and free * concurrency */ while (t->next_stream_id <= MAX_CLIENT_STREAM_ID && @@ -797,10 +789,6 @@ static void maybe_start_some_streams(grpc_exec_ctx *exec_ctx, "no_more_stream_ids"); } - stream_incoming_window = - t->settings[GRPC_SENT_SETTINGS] - [GRPC_CHTTP2_SETTINGS_INITIAL_WINDOW_SIZE]; - s->max_recv_bytes = GPR_MAX(stream_incoming_window, s->max_recv_bytes); grpc_chttp2_stream_map_add(&t->stream_map, s->id, s); post_destructive_reclaimer(exec_ctx, t); grpc_chttp2_become_writable(exec_ctx, t, s, true, "new_stream"); @@ -1127,8 +1115,7 @@ static void perform_stream_op_locked(grpc_exec_ctx *exec_ctx, void *stream_op, s->recv_message = op->recv_message; if (s->id != 0 && (s->incoming_frames.head == NULL || s->incoming_frames.head->is_tail)) { - incoming_byte_stream_update_flow_control(exec_ctx, t, s, - t->stream_lookahead, 0); + incoming_byte_stream_update_flow_control(exec_ctx, t, s, 5, 0); } grpc_chttp2_maybe_complete_recv_message(exec_ctx, t, s); } @@ -1890,10 +1877,12 @@ static void incoming_byte_stream_update_flow_control(grpc_exec_ctx *exec_ctx, size_t max_size_hint, size_t have_already) { uint32_t max_recv_bytes; + uint32_t initial_window_size = + t->settings[GRPC_SENT_SETTINGS][GRPC_CHTTP2_SETTINGS_INITIAL_WINDOW_SIZE]; /* clamp max recv hint to an allowable size */ - if (max_size_hint >= UINT32_MAX - t->stream_lookahead) { - max_recv_bytes = UINT32_MAX - t->stream_lookahead; + if (max_size_hint >= UINT32_MAX - initial_window_size) { + max_recv_bytes = UINT32_MAX - initial_window_size; } else { max_recv_bytes = (uint32_t)max_size_hint; } @@ -1906,14 +1895,12 @@ static void incoming_byte_stream_update_flow_control(grpc_exec_ctx *exec_ctx, } /* add some small lookahead to keep pipelines flowing */ - GPR_ASSERT(max_recv_bytes <= UINT32_MAX - t->stream_lookahead); - max_recv_bytes += t->stream_lookahead; - if (s->max_recv_bytes < max_recv_bytes) { - uint32_t add_max_recv_bytes = max_recv_bytes - s->max_recv_bytes; + GPR_ASSERT(max_recv_bytes <= UINT32_MAX - initial_window_size); + if (s->incoming_window_delta < max_recv_bytes) { + uint32_t add_max_recv_bytes = + (uint32_t)(max_recv_bytes - s->incoming_window_delta); bool new_window_write_is_covered_by_poller = - s->max_recv_bytes < have_already; - GRPC_CHTTP2_FLOW_CREDIT_STREAM("op", t, s, max_recv_bytes, - add_max_recv_bytes); + s->incoming_window_delta + initial_window_size < (int64_t)have_already; GRPC_CHTTP2_FLOW_CREDIT_STREAM("op", t, s, incoming_window_delta, add_max_recv_bytes); GRPC_CHTTP2_FLOW_CREDIT_STREAM("op", t, s, announce_window, diff --git a/src/core/ext/transport/chttp2/transport/internal.h b/src/core/ext/transport/chttp2/transport/internal.h index 3dbcdbb78fa..efc11357e9f 100644 --- a/src/core/ext/transport/chttp2/transport/internal.h +++ b/src/core/ext/transport/chttp2/transport/internal.h @@ -271,9 +271,6 @@ struct grpc_chttp2_transport { copied to next_stream_id in parsing when parsing commences */ uint32_t next_stream_id; - /** how far to lookahead in a stream? */ - uint32_t stream_lookahead; - /** last new stream id */ uint32_t last_new_stream_id; @@ -365,10 +362,6 @@ struct grpc_chttp2_stream { * size of the transport... ie: * outgoing_window = outgoing_window_delta + transport.initial_window_size */ int64_t outgoing_window_delta; - /** The number of bytes the upper layers have offered to receive. - As the upper layer offers more bytes, this value increases. - As bytes are read, this value decreases. */ - uint32_t max_recv_bytes; /** things the upper layers would like to send */ grpc_metadata_batch *send_initial_metadata; grpc_closure *send_initial_metadata_finished; diff --git a/src/core/ext/transport/chttp2/transport/parsing.c b/src/core/ext/transport/chttp2/transport/parsing.c index eccff0db8a8..086ed18560c 100644 --- a/src/core/ext/transport/chttp2/transport/parsing.c +++ b/src/core/ext/transport/chttp2/transport/parsing.c @@ -398,8 +398,6 @@ static grpc_error *update_incoming_window(grpc_exec_ctx *exec_ctx, GRPC_CHTTP2_FLOW_DEBIT_STREAM("parse", t, s, incoming_window_delta, incoming_frame_size); s->received_bytes += incoming_frame_size; - s->max_recv_bytes -= - (uint32_t)GPR_MIN(s->max_recv_bytes, incoming_frame_size); } return GRPC_ERROR_NONE;