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.
diff --git a/src/http/ngx_http_write_filter_module.c b/src/http/ngx_http_write_filter_module.c
index 6a5d957..bd37704 100644
--- a/src/http/ngx_http_write_filter_module.c
+++ b/src/http/ngx_http_write_filter_module.c
@@ -331,8 +331,7 @@
&& 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 */) {
