[dpdk-stable] [PATCH 19.11.9] eal/windows: fix default thread priority

[Tal Shnaiderman]

[ upstream commit 16afcbfa30e9c2831264fb349457a4228fa687c8 ]

The hard-coded thread priority for Windows threads in EAL
is REALTIME_PRIORITY_CLASS/THREAD_PRIORITY_TIME_CRITICAL.

This results in issues with DPDK threads causing OS thread starvation
and eventually a bugcheck.

The fix reduce the thread priority to
NORMAL_PRIORITY_CLASS/THREAD_PRIORITY_NORMAL.

Bugzilla ID: 600

Reported-by: Odi Assli <odia at nvidia.com>
Signed-off-by: Tal Shnaiderman <talshn at nvidia.com>
Acked-by: Dmitry Kozlyuk <dmitry.kozliuk at gmail.com>
---
 lib/librte_eal/windows/eal/eal_thread.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/librte_eal/windows/eal/eal_thread.c b/lib/librte_eal/windows/eal/eal_thread.c
index 0591d4c7fb..af1e7fe2ea 100644
--- a/lib/librte_eal/windows/eal/eal_thread.c
+++ b/lib/librte_eal/windows/eal/eal_thread.c
@@ -147,8 +147,8 @@ eal_thread_create(pthread_t *thread)
 	if (!th)
 		return -1;
 
-	SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS);
-	SetThreadPriority(th, THREAD_PRIORITY_TIME_CRITICAL);
+	SetPriorityClass(GetCurrentProcess(), NORMAL_PRIORITY_CLASS);
+	SetThreadPriority(th, THREAD_PRIORITY_NORMAL);
 
 	return 0;
 }
-- 
2.16.1.windows.4