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changeset 7946:61e9c078ee3d

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Switched to using posted next events after sendfile_max_chunk. Previously, 1 millisecond delay was used instead. In certain edge cases this might result in noticeable performance degradation though, notably on Linux with typical CONFIG_HZ=250 (so 1ms delay becomes 4ms), sendfile_max_chunk 2m, and link speed above 2.5 Gbps. Using posted next events removes the artificial delay and makes processing fast in all cases.
author Maxim Dounin <mdounin@mdounin.ru>
date Fri, 29 Oct 2021 20:21:43 +0300
parents f17ba8ecaaf0
children 51a260276425
files src/http/ngx_http_write_filter_module.c
diffstat 1 files changed, 1 insertions(+), 2 deletions(-) [+]
line wrap: on
line diff
--- a/src/http/ngx_http_write_filter_module.c
+++ b/src/http/ngx_http_write_filter_module.c
@@ -331,8 +331,7 @@ ngx_http_write_filter(ngx_http_request_t
         && c->write->ready
         && c->sent - sent >= limit - (off_t) (2 * ngx_pagesize))
     {
-        c->write->delayed = 1;
-        ngx_add_timer(c->write, 1);
+        ngx_post_event(c->write, &ngx_posted_next_events);
     }
 
     for (cl = r->out; cl && cl != chain; /* void */) {