From 31c50e110cf5c0c37dc05c4730419d83f31ec495 Mon Sep 17 00:00:00 2001
From: Karol Latecki <karol.latecki@intel.com>
Date: Mon, 19 Apr 2021 17:33:36 +0200
Subject: [PATCH] scripts/nvmf_perf: disable sysctl busy_read timeout

Set busy_poll to 0 for non-ADQ. Having it enabled with
this value results is huge latency increase.

Signed-off-by: Karol Latecki <karol.latecki@intel.com>
Change-Id: Ic68ed2b7dc19b8d4b274ce8622194489693863cb
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/7480
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Maciej Wawryk <maciejx.wawryk@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
---
 scripts/perf/nvmf/run_nvmf.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/perf/nvmf/run_nvmf.py b/scripts/perf/nvmf/run_nvmf.py
index 6614d1c79..8d365eb41 100755
--- a/scripts/perf/nvmf/run_nvmf.py
+++ b/scripts/perf/nvmf/run_nvmf.py
@@ -173,7 +173,7 @@ class Server:
     def configure_sysctl(self):
         self.log_print("Tuning sysctl settings...")
 
-        busy_read = 50000
+        busy_read = 0
         if self.enable_adq and self.mode == "spdk":
             busy_read = 1