[master] 31ec2bd22 Rush waitinglist when doing hit-for-pass
Martin Blix Grydeland
martin at varnish-software.com
Tue Apr 23 12:42:08 UTC 2019
commit 31ec2bd22c3a9beb61a4af93c103550e5affaf05
Author: Martin Blix Grydeland <martin at varnish-software.com>
Date: Wed Apr 17 16:35:55 2019 +0200
Rush waitinglist when doing hit-for-pass
This rushes the waitinglist when encountering a hit-for-pass during
HSH_Lookup. Without this, the rushing may be delayed until the passed
object completes delivery.
Test cases c00098.vtc and c00099.vtc tests this early rushing behaviour
for HFP and HFM respectively.
Fixes: #2978
diff --git a/bin/varnishd/cache/cache_hash.c b/bin/varnishd/cache/cache_hash.c
index 113615b73..ead55932c 100644
--- a/bin/varnishd/cache/cache_hash.c
+++ b/bin/varnishd/cache/cache_hash.c
@@ -483,7 +483,7 @@ HSH_Lookup(struct req *req, struct objcore **ocp, struct objcore **bocp)
if (oc != NULL && oc->flags & OC_F_HFP) {
xid = ObjGetXID(wrk, oc);
dttl = EXP_Dttl(req, oc);
- AN(hsh_deref_objhead_unlock(wrk, &oh, 0));
+ AN(hsh_deref_objhead_unlock(wrk, &oh, HSH_RUSH_POLICY));
wrk->stats->cache_hitpass++;
VSLb(req->vsl, SLT_HitPass, "%u %.6f", xid, dttl);
return (HSH_HITPASS);
diff --git a/bin/varnishtest/tests/c00098.vtc b/bin/varnishtest/tests/c00098.vtc
new file mode 100644
index 000000000..423c4f995
--- /dev/null
+++ b/bin/varnishtest/tests/c00098.vtc
@@ -0,0 +1,123 @@
+varnishtest "Hit-for-pass and waitinglist rushing"
+
+barrier b2 cond 6
+
+server s1 {
+ rxreq
+ txresp -nolen -hdr "Transfer-Encoding: chunked"
+ chunkedlen 10
+ barrier b2 sync
+ chunkedlen 10
+ chunkedlen 0
+} -start
+
+server s2 {
+ rxreq
+ txresp -nolen -hdr "Transfer-Encoding: chunked"
+ chunkedlen 10
+ barrier b2 sync
+ chunkedlen 10
+ chunkedlen 0
+} -start
+
+server s3 {
+ rxreq
+ txresp -nolen -hdr "Transfer-Encoding: chunked"
+ chunkedlen 10
+ barrier b2 sync
+ chunkedlen 10
+ chunkedlen 0
+} -start
+
+server s4 {
+ rxreq
+ txresp -nolen -hdr "Transfer-Encoding: chunked"
+ chunkedlen 10
+ barrier b2 sync
+ chunkedlen 10
+ chunkedlen 0
+} -start
+
+server s5 {
+ rxreq
+ txresp -nolen -hdr "Transfer-Encoding: chunked"
+ chunkedlen 10
+ barrier b2 sync
+ chunkedlen 10
+ chunkedlen 0
+} -start
+
+server s6 {
+ rxreq
+ txresp -nolen -hdr "Transfer-Encoding: chunked"
+ chunkedlen 10
+ barrier b2 sync
+ chunkedlen 10
+ chunkedlen 0
+} -start
+
+varnish v1 -arg "-p rush_exponent=2" -arg "-p debug=+syncvsl" -vcl+backend {
+ import vtc;
+ sub vcl_backend_fetch {
+ if (bereq.http.client == "1") {
+ set bereq.backend = s1;
+ } else if (bereq.http.client == "2") {
+ set bereq.backend = s2;
+ } else if (bereq.http.client == "3") {
+ set bereq.backend = s3;
+ } else if (bereq.http.client == "4") {
+ set bereq.backend = s4;
+ } else if (bereq.http.client == "5") {
+ set bereq.backend = s5;
+ } else if (bereq.http.client == "6") {
+ set bereq.backend = s6;
+ }
+ }
+ sub vcl_backend_response {
+ return (pass(1m));
+ }
+} -start
+
+client c1 {
+ txreq -url /hfp -hdr "Client: 1"
+ rxresp
+} -start
+
+client c2 {
+ txreq -url /hfp -hdr "Client: 2"
+ rxresp
+} -start
+
+client c3 {
+ txreq -url /hfp -hdr "Client: 3"
+ rxresp
+} -start
+
+client c4 {
+ txreq -url /hfp -hdr "Client: 4"
+ rxresp
+} -start
+
+client c5 {
+ txreq -url /hfp -hdr "Client: 5"
+ rxresp
+} -start
+
+client c6 {
+ txreq -url /hfp -hdr "Client: 6"
+ rxresp
+} -start
+
+client c1 -wait
+client c2 -wait
+client c3 -wait
+client c4 -wait
+client c5 -wait
+client c6 -wait
+
+server s1 -wait
+server s2 -wait
+server s3 -wait
+server s4 -wait
+server s5 -wait
+server s6 -wait
diff --git a/bin/varnishtest/tests/c00099.vtc b/bin/varnishtest/tests/c00099.vtc
new file mode 100644
index 000000000..ec2840796
--- /dev/null
+++ b/bin/varnishtest/tests/c00099.vtc
@@ -0,0 +1,123 @@
+varnishtest "Hit-for-miss and waitinglist rushing"
+
+barrier b3 cond 6
+
+server s1 {
+ rxreq
+ txresp -nolen -hdr "Transfer-Encoding: chunked"
+ chunkedlen 10
+ barrier b3 sync
+ chunkedlen 10
+ chunkedlen 0
+} -start
+
+server s2 {
+ rxreq
+ txresp -nolen -hdr "Transfer-Encoding: chunked"
+ chunkedlen 10
+ barrier b3 sync
+ chunkedlen 10
+ chunkedlen 0
+} -start
+
+server s3 {
+ rxreq
+ txresp -nolen -hdr "Transfer-Encoding: chunked"
+ chunkedlen 10
+ barrier b3 sync
+ chunkedlen 10
+ chunkedlen 0
+} -start
+
+server s4 {
+ rxreq
+ txresp -nolen -hdr "Transfer-Encoding: chunked"
+ chunkedlen 10
+ barrier b3 sync
+ chunkedlen 10
+ chunkedlen 0
+} -start
+
+server s5 {
+ rxreq
+ txresp -nolen -hdr "Transfer-Encoding: chunked"
+ chunkedlen 10
+ barrier b3 sync
+ chunkedlen 10
+ chunkedlen 0
+} -start
+
+server s6 {
+ rxreq
+ txresp -nolen -hdr "Transfer-Encoding: chunked"
+ chunkedlen 10
+ barrier b3 sync
+ chunkedlen 10
+ chunkedlen 0
+} -start
+
+varnish v1 -arg "-p rush_exponent=2" -arg "-p debug=+syncvsl" -vcl+backend {
+ import vtc;
+ sub vcl_backend_fetch {
+ if (bereq.http.client == "1") {
+ set bereq.backend = s1;
+ } else if (bereq.http.client == "2") {
+ set bereq.backend = s2;
+ } else if (bereq.http.client == "3") {
+ set bereq.backend = s3;
+ } else if (bereq.http.client == "4") {
+ set bereq.backend = s4;
+ } else if (bereq.http.client == "5") {
+ set bereq.backend = s5;
+ } else if (bereq.http.client == "6") {
+ set bereq.backend = s6;
+ }
+ }
+ sub vcl_backend_response {
+ set beresp.uncacheable = true;
+ }
+} -start
+
+client c1 {
+ txreq -url /hfm -hdr "Client: 1"
+ rxresp
+} -start
+
+client c2 {
+ txreq -url /hfm -hdr "Client: 2"
+ rxresp
+} -start
+
+client c3 {
+ txreq -url /hfm -hdr "Client: 3"
+ rxresp
+} -start
+
+client c4 {
+ txreq -url /hfm -hdr "Client: 4"
+ rxresp
+} -start
+
+client c5 {
+ txreq -url /hfm -hdr "Client: 5"
+ rxresp
+} -start
+
+client c6 {
+ txreq -url /hfm -hdr "Client: 6"
+ rxresp
+} -start
+
+client c1 -wait
+client c2 -wait
+client c3 -wait
+client c4 -wait
+client c5 -wait
+client c6 -wait
+
+server s1 -wait
+server s2 -wait
+server s3 -wait
+server s4 -wait
+server s5 -wait
+server s6 -wait
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