[FFmpeg-devel] [PATCH] change flag of cuCtxCreate to avoid CPU spins

[Agatha Hu]

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

diff --git a/libavcodec/nvenc.c b/libavcodec/nvenc.c
index 7c683ea..a20356f 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);
-- 
1.9.5.github.0