From 6504b2bf10a3a0322a8dd7be05bf5ce47fd67086 Mon Sep 17 00:00:00 2001
From: Frederic Lecaille <flecaille@haproxy.com>
Date: Wed, 22 Jul 2026 11:00:49 +0200
Subject: [PATCH] BUG/MINOR: haload: set default thread count to 1

By default <arg_thrd> was unset (-1) and fell back to global.nbthread,
causing inconsistencies since <arg_usr> defaults to 1. This patch sets
the default thread count to 1, enforces that <arg_thrd> does not exceed
<arg_usr>, updates usage help, and writes nbthread unconditionally.

Modify the doc/haload.txt file.
---
 doc/haload.txt    |  2 +-
 src/haload_init.c | 10 +++++++---
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/doc/haload.txt b/doc/haload.txt
index c82e6d92f..73ecc5d48 100644
--- a/doc/haload.txt
+++ b/doc/haload.txt
@@ -66,7 +66,7 @@ HALoad displays its usage when run without argument or wrong arguments:
             -n <reqs>        maximum total requests (-1)
             -r <reqs>        number of requests per connection (-1)
             -s <time>        soft start: time in sec to reach 100% load
-            -t <threads>     number of threads
+            -t <threads>     number of threads (1)
             -u <users>       number of users (1)
             -w <time>        I/O timeout in milliseconds (10000)
             -C               dump the configuration and exit
diff --git a/src/haload_init.c b/src/haload_init.c
index 08cf051a0..3482bbce2 100644
--- a/src/haload_init.c
+++ b/src/haload_init.c
@@ -28,7 +28,7 @@ static void  hld_usage(char *name, int argc)
 		"        -n <reqs>        maximum total requests (-1)\n"
 		"        -r <reqs>        number of requests per connection (-1)\n"
 		"        -s <time>        soft start: time in sec to reach 100%% load\n"
-		"        -t <threads>     number of threads\n"
+		"        -t <threads>     number of threads (1)\n"
 		"        -u <users>       number of users (1)\n"
 		"        -w <time>        I/O timeout in milliseconds (10000)\n"
 		"        -A               ignore 1st req for resp time measurements\n"
@@ -650,10 +650,14 @@ void haproxy_init_args(int argc, char **argv)
 		goto leave;
 	}
 
+	if (arg_thrd > arg_usr) {
+		ha_alert("Thread count must not exceed connection count\n");
+		goto leave;
+	}
+
 	/* "global" section */
 	hbuf_appendf(&buf, "%.*s", (int)gbuf.data, gbuf.area);
-	if (arg_thrd != -1)
-		hbuf_appendf(&buf, "\tnbthread %d\n", arg_thrd);
+	hbuf_appendf(&buf, "\tnbthread %d\n", arg_thrd);
 	if (arg_mreqs)
 		hbuf_appendf(&buf,
 		             "\ttune.h2.be.max-concurrent-streams %d\n", arg_mreqs);
-- 
2.47.3