Mercurial > hg > nginx
diff src/http/ngx_http_upstream.c @ 6443:fc72784b1f52
Threads: writing via threads pools in event pipe.
The "aio_write" directive is introduced, which enables use of aio
for writing. Currently it is meaningful only with "aio threads".
Note that aio operations can be done by both event pipe and output
chain, so proper mapping between r->aio and p->aio is provided when
calling ngx_event_pipe() and in output filter.
In collaboration with Valentin Bartenev.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Fri, 18 Mar 2016 06:44:49 +0300 |
parents | 81329f6a4254 |
children | 984687f25998 |
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line diff
--- a/src/http/ngx_http_upstream.c Fri Mar 18 06:44:03 2016 +0300 +++ b/src/http/ngx_http_upstream.c Fri Mar 18 06:44:49 2016 +0300 @@ -76,6 +76,13 @@ static ngx_int_t ngx_http_upstream_non_buffered_filter_init(void *data); static ngx_int_t ngx_http_upstream_non_buffered_filter(void *data, ssize_t bytes); +#if (NGX_THREADS) +static ngx_int_t ngx_http_upstream_thread_handler(ngx_thread_task_t *task, + ngx_file_t *file); +static void ngx_http_upstream_thread_event_handler(ngx_event_t *ev); +#endif +static ngx_int_t ngx_http_upstream_output_filter(void *data, + ngx_chain_t *chain); static void ngx_http_upstream_process_downstream(ngx_http_request_t *r); static void ngx_http_upstream_process_upstream(ngx_http_request_t *r, ngx_http_upstream_t *u); @@ -2870,7 +2877,7 @@ p = u->pipe; - p->output_filter = (ngx_event_pipe_output_filter_pt) ngx_http_output_filter; + p->output_filter = ngx_http_upstream_output_filter; p->output_ctx = r; p->tag = u->output.tag; p->bufs = u->conf->bufs; @@ -2913,6 +2920,13 @@ p->max_temp_file_size = u->conf->max_temp_file_size; p->temp_file_write_size = u->conf->temp_file_write_size; +#if (NGX_THREADS) + if (clcf->aio == NGX_HTTP_AIO_THREADS && clcf->aio_write) { + p->thread_handler = ngx_http_upstream_thread_handler; + p->thread_ctx = r; + } +#endif + p->preread_bufs = ngx_alloc_chain_link(r->pool); if (p->preread_bufs == NULL) { ngx_http_upstream_finalize_request(r, u, NGX_ERROR); @@ -3487,6 +3501,97 @@ } +#if (NGX_THREADS) + +static ngx_int_t +ngx_http_upstream_thread_handler(ngx_thread_task_t *task, ngx_file_t *file) +{ + ngx_str_t name; + ngx_event_pipe_t *p; + ngx_thread_pool_t *tp; + ngx_http_request_t *r; + ngx_http_core_loc_conf_t *clcf; + + r = file->thread_ctx; + p = r->upstream->pipe; + + clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); + tp = clcf->thread_pool; + + if (tp == NULL) { + if (ngx_http_complex_value(r, clcf->thread_pool_value, &name) + != NGX_OK) + { + return NGX_ERROR; + } + + tp = ngx_thread_pool_get((ngx_cycle_t *) ngx_cycle, &name); + + if (tp == NULL) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "thread pool \"%V\" not found", &name); + return NGX_ERROR; + } + } + + task->event.data = r; + task->event.handler = ngx_http_upstream_thread_event_handler; + + if (ngx_thread_task_post(tp, task) != NGX_OK) { + return NGX_ERROR; + } + + r->main->blocked++; + r->aio = 1; + p->aio = 1; + + return NGX_OK; +} + + +static void +ngx_http_upstream_thread_event_handler(ngx_event_t *ev) +{ + ngx_connection_t *c; + ngx_http_request_t *r; + + r = ev->data; + c = r->connection; + + ngx_http_set_log_request(c->log, r); + + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http upstream thread: \"%V?%V\"", &r->uri, &r->args); + + r->main->blocked--; + r->aio = 0; + + r->write_event_handler(r); + + ngx_http_run_posted_requests(c); +} + +#endif + + +static ngx_int_t +ngx_http_upstream_output_filter(void *data, ngx_chain_t *chain) +{ + ngx_int_t rc; + ngx_event_pipe_t *p; + ngx_http_request_t *r; + + r = data; + p = r->upstream->pipe; + + rc = ngx_http_output_filter(r, chain); + + p->aio = r->aio; + + return rc; +} + + static void ngx_http_upstream_process_downstream(ngx_http_request_t *r) { @@ -3505,6 +3610,10 @@ c->log->action = "sending to client"; +#if (NGX_THREADS) + p->aio = r->aio; +#endif + if (wev->timedout) { if (wev->delayed) { @@ -3634,6 +3743,12 @@ p = u->pipe; +#if (NGX_THREADS) + if (p->writing) { + return; + } +#endif + if (u->peer.connection) { if (u->store) {