[FFmpeg-devel] [PATCH 1/3] change cuda ctx creation flag

[Agatha Hu]

From: agathah <ahu at nvidia.com>

---
 libavcodec/nvenc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/nvenc.c b/libavcodec/nvenc.c
index 5490652..3174b01 100644
--- a/libavcodec/nvenc.c
+++ b/libavcodec/nvenc.c
@@ -580,7 +580,7 @@ static av_cold int nvenc_encode_init(AVCodecContext *avctx)
     }
 
     ctx->cu_context = NULL;
-    cu_res = dl_fn->cu_ctx_create(&ctx->cu_context, 0, dl_fn->nvenc_devices[ctx->gpu]);
+    cu_res = dl_fn->cu_ctx_create(&ctx->cu_context, 4, dl_fn->nvenc_devices[ctx->gpu]); // CU_CTX_SCHED_BLOCKING_SYNC=4, avoid CPU spins
 
     if (cu_res != CUDA_SUCCESS) {
         av_log(avctx, AV_LOG_FATAL, "Failed creating CUDA context for NVENC: 0x%x\n", (int)cu_res);
-- 
1.7.9.5