From 65b5fcdb2e74caeeae63a47f0674357ff4816efa Mon Sep 17 00:00:00 2001
From: HU <uestc.hugo@gmail.com>
Date: Mon, 1 Aug 2022 10:15:44 +0800
Subject: [PATCH] fix #1973 (#1863)

Co-authored-by: XiguoHu <huxiguo@baidu.com>
---
 src/bvar/detail/sampler.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/bvar/detail/sampler.cpp b/src/bvar/detail/sampler.cpp
index 3a14b375da..9887539f15 100644
--- a/src/bvar/detail/sampler.cpp
+++ b/src/bvar/detail/sampler.cpp
@@ -17,6 +17,7 @@
 
 // Date: Tue Jul 28 18:14:40 CST 2015
 
+#include <gflags/gflags.h>
 #include "butil/time.h"
 #include "butil/memory/singleton_on_pthread_once.h"
 #include "bvar/reducer.h"
@@ -127,7 +128,11 @@ static PassiveStatus<double>* s_cumulated_time_bvar = NULL;
 static bvar::PerSecond<bvar::PassiveStatus<double> >* s_sampling_thread_usage_bvar = NULL;
 #endif
 
+DEFINE_int32(bvar_sampler_thread_start_delay_us, 10000, "bvar sampler thread start delay us");
+
 void SamplerCollector::run() {
+    ::usleep(FLAGS_bvar_sampler_thread_start_delay_us);
+    
 #ifndef UNIT_TEST
     // NOTE:
     // * Following vars can't be created on thread's stack since this thread