From 4dca64c1a9ffcb506ad81720951f7536b70e394e Mon Sep 17 00:00:00 2001
From: psychocrypt <psychocrypt@users.noreply.github.com>
Date: Fri, 1 Dec 2017 21:37:11 +0100
Subject: option to controll gpu synchronization

- add option `sync_mode`
- update auto suggestion and jconf
---
 xmrstak/backend/nvidia/nvcc_code/cryptonight.hpp |  3 ++-
 xmrstak/backend/nvidia/nvcc_code/cuda_extra.cu   | 17 ++++++++++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

(limited to 'xmrstak/backend/nvidia/nvcc_code')

diff --git a/xmrstak/backend/nvidia/nvcc_code/cryptonight.hpp b/xmrstak/backend/nvidia/nvcc_code/cryptonight.hpp
index 1b63379..afbdbaf 100644
--- a/xmrstak/backend/nvidia/nvcc_code/cryptonight.hpp
+++ b/xmrstak/backend/nvidia/nvcc_code/cryptonight.hpp
@@ -11,7 +11,8 @@ typedef struct {
 	int device_blocks;
 	int device_threads;
 	int device_bfactor;
-	int device_bsleep;
+	int device_bsleep;	
+	int syncMode;
 
 	uint32_t *d_input;
 	uint32_t inputlen;
diff --git a/xmrstak/backend/nvidia/nvcc_code/cuda_extra.cu b/xmrstak/backend/nvidia/nvcc_code/cuda_extra.cu
index 333ae73..0fc99a4 100644
--- a/xmrstak/backend/nvidia/nvcc_code/cuda_extra.cu
+++ b/xmrstak/backend/nvidia/nvcc_code/cuda_extra.cu
@@ -189,7 +189,22 @@ extern "C" int cryptonight_extra_cpu_init(nvid_ctx* ctx)
 	}
 
 	cudaDeviceReset();
-	cudaSetDeviceFlags(cudaDeviceScheduleBlockingSync);
+	switch(ctx->syncMode)
+	{
+	case 0:
+		cudaSetDeviceFlags(cudaDeviceScheduleAuto);
+		break;
+	case 1:
+		cudaSetDeviceFlags(cudaDeviceScheduleSpin);
+		break;
+	case 2:
+		cudaSetDeviceFlags(cudaDeviceScheduleYield);
+		break;
+	case 3:
+		cudaSetDeviceFlags(cudaDeviceScheduleBlockingSync);
+		break;
+
+	};
 	cudaDeviceSetCacheConfig(cudaFuncCachePreferL1);
 
 	size_t hashMemSize;
-- 
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