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

[Tal Shnaiderman]

> Subject: [dpdk-dev] [PATCH] eal/windows: fix default thread priority
> 
> 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
> Fixes: 53ffd9f080f ("eal/windows: add minimum viable code")
> Cc: stable at dpdk.org
> 
> Reported-by: Odi Assli <odia at nvidia.com>
> Signed-off-by: Tal Shnaiderman <talshn at nvidia.com>
> ---
>  lib/librte_eal/windows/eal_thread.c      | 4 ++--
>  lib/librte_eal/windows/include/pthread.h | 4 ++--
>  2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/lib/librte_eal/windows/eal_thread.c
> b/lib/librte_eal/windows/eal_thread.c
> index 908e726d16..9c3f6d69fd 100644
> --- a/lib/librte_eal/windows/eal_thread.c
> +++ b/lib/librte_eal/windows/eal_thread.c
> @@ -134,8 +134,8 @@ 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;
>  }
> diff --git a/lib/librte_eal/windows/include/pthread.h
> b/lib/librte_eal/windows/include/pthread.h
> index fb11a07ce6..9aeab1fa70 100644
> --- a/lib/librte_eal/windows/include/pthread.h
> +++ b/lib/librte_eal/windows/include/pthread.h
> @@ -137,8 +137,8 @@ pthread_create(void *threadid, const void
> *threadattr, void *threadfunc,
>  	hThread = CreateThread(NULL, 0,
> (LPTHREAD_START_ROUTINE)threadfunc,
>  		args, 0, (LPDWORD)threadid);
>  	if (hThread) {
> -		SetPriorityClass(GetCurrentProcess(),
> REALTIME_PRIORITY_CLASS);
> -		SetThreadPriority(hThread,
> THREAD_PRIORITY_TIME_CRITICAL);
> +		SetPriorityClass(GetCurrentProcess(),
> NORMAL_PRIORITY_CLASS);
> +		SetThreadPriority(hThread, THREAD_PRIORITY_NORMAL);
>  	}
>  	return ((hThread != NULL) ? 0 : E_FAIL);  }
> --
> 2.16.1.windows.4

Hi,

Any comments on the patch or can it be Acked as was discussed in the community call?