cuda out of memory（CUDA共享内存数组变量问题，怎么解决）

本文目录

• CUDA共享内存数组变量问题，怎么解决
• cuda error out of memory 怎么解决
• cuda中page-locked memory怎么使用
• 电脑显示out of video memory，怎样解决
• 提示GPU memory full，是显卡不行吗
• cuda计算结果不对

CUDA共享内存数组变量问题，怎么解决

如果只做矩阵加法没有必要用到共享内存（shared memory）来做缓存。用一位数组存储矩阵，然后直接用strided loop就行了，这样可以保证代买的scalability。提速可以依靠Kepler架构的L1 缓存来实现自动的缓存。

__global__ void MatrixAdd( // Inputs int n, // Size of the matrix float *a, float *b, // Output float *c){ for(auto i = blockIdx.x*blockDim.x+threadIdx.x; i 《 n; i += blockDim.x * gridDim.x) { c[i] = a[i] + b[i]; }}// 在调用这个Kerenel之前设定cudaDeviceSetCacheConfig(cudaFuncCachePreferL1);就行了，意思是主要用L1来做缓存。

cuda error out of memory 怎么解决

今天刚把服务器搭建起来 结果程序就跑不起来 当时差点把自己吓尿了
错误类型：CUDA_ERROE_OUT_OF_MEMORY
E tensorflow/stream_executor/cuda/cuda_driver.cc:924] failed to alloc 17179869184 bytes on host: CUDA_ERROR_OUT_OF_MEMORY
W ./tensorflow/core/common_runtime/gpu/pool_allocator.h:195] could not allocate pinned host memory of size: 17179869184
Killed

其实很容易理解 大致意思就是 服务器的GPU大小为M
tensorflow只能申请N（N《M）
也就是tensorflow告诉你 不能申请到GPU的全部资源 然后就不干了
解决方法：
找到代码中Session
在session定义前 增加

config = tf.ConfigProto(allow_soft_placement=True)
#最多占gpu资源的70%
gpu_options = tf.GPUOptions(per_process_gpu_memory_fraction=0.7)
#开始不会给tensorflow全部gpu资源 而是按需增加
config.gpu_options.allow_growth = True
sess = tf.Session(config=config)
这样就没问题了

其实tensorflow 算是一个比较贪心的工具了
就算用device_id指定gpu 也会占用别的GPU的显存资源 必须在执行程序前
执行 export CUDA_VISIBLE_DEVICES=n（n为可见的服务器编号）
再去执行Python 代码.py 才不会占用别的GPU资源
最近刚开始搞tensorflow 之前都是caffe
这周连续3天被实验室的人 举报 占用过多服务器资源 真是心累 只要用上面的方法
也就是执行代码前 执行 export CUDA_VISIBLE_DEVICES=n
只让1个或者个别GPU可见 其他GPU看不见 就行了

cuda中page-locked memory怎么使用

你好，

CUDA默认的都是pageabled的memory，page-locked也就是pinned memory可以加快host和device之间的数据传输速度，但是使用太多的page-locked的memory会带来整个程序的效率降低。如果程序中存在频繁的cudaMemcpy，可以选择这种memory，具体用法如下：

1. 用cudaHostAlloc代替cudaMalloc，最后一个参数默认就行。

2. 用cudaMemcpyAsync()替代cudaMemcpy保证最大的concurrency。

3. 用cudaFreeHost代替cudaFree()

其他操作均不变。

谢谢，望采纳

电脑显示out of video memory，怎样解决

有关out of memory的问题及解决方法：

1. 运行的程序相对占用内存较多，出现这种情况大多是一些特别大型的程序，例如3DsMax，Maya，当然一些CF游戏也会出现。

2. CF游戏客户端版本过低或版本有问题。

3. 电脑打开的程序过多，这样因程序过多点用的内存资源过多也会出现out of memory问题。

4. 电脑病毒感染，如果电脑中毒了，这时大量的内存被病毒点用掉了，这时同样会出现out of memory提示信息。

5. 电脑设置不正确或电脑程序运行配置不正确。

6. 要解决出现out of memory的问题，首先要找出是什么原因导致这种情况出现，是程序软件问题还是硬件问题。

7. 如果是你在玩CF进出现out of memory情况，先看看你的电脑有没有达到CF的最低要求，例如双核、4G内存以上，关掉一些应用程序，如果仍然不行这时估计是版本问题，更新最新的CF客户端版本，也可以偿试在开始菜单中的运行窗口中输入cmd命令，这时会进入DOS环境下，这时再输入命令：Bcdedit /set IncreaseUserVa 3072，完成之后，按Entel(回车)键确定即可，一般也可以解决，记得要重启，否则不行。

8. 打开程序过多，这个好解决，用力点X，关闭再关闭就行。

9. 中毒了也好办，杀杀杀………，不用我来教，一切交给杀毒软件就好了。

提示GPU memory full，是显卡不行吗

1. 提示GPU memory full说明显卡的显存使用已达到最高，无法容纳了；

2. GPU占用率较高有可能是运行大型的游戏或者是运行软件，可关闭后台运行的软件看是否正常或者可直接升级显卡的硬件。
   

cuda计算结果不对

68.29 + 13.88 = 82.17
38.80 + 73.42 = 112.23
37.82 + 52.92 = 90.74
48.28 + 46.46 = 94.74
26.75 + 0.53 = 27.28
14.66 + 91.82 = 106.48
72.33 + 34.75 = 107.07
11.04 + 73.72 = 84.76
81.99 + 49.18 = 131.17
91.21 + 8.72 = 99.92
97.31 + 33.23 = 130.54
27.91 + 17.64 = 45.55
88.95 + 38.54 = 127.49
98.61 + 59.50 = 158.11
87.36 + 77.63 = 164.98
29.85 + 34.29 = 64.14
40.54 + 19.02 = 59.55
50.75 + 87.14 = 137.89
72.88 + 6.43 = 79.31
59.24 + 55.84 = 115.08
58.66 + 1.00 = 59.66
84.70 + 89.83 = 174.53
84.40 + 87.08 = 171.47
49.65 + 44.12 = 93.77
17.48 + 56.63 = 74.11
3.40 + 28.12 = 31.52
86.75 + 56.83 = 143.57
35.45 + 80.36 = 115.81
77.04 + 13.17 = 90.21
87.35 + 57.39 = 144.74
6.62 + 88.13 = 94.75
81.95 + 81.65 = 163.60
55.30 + 66.12 = 121.42
90.89 + 0.98 = 91.87
6.26 + 31.50 = 37.76
76.69 + 84.76 = 161.45
16.86 + 90.13 = 106.99
88.61 + 29.88 = 118.49
6.64 + 39.07 = 45.70
72.44 + 88.04 = 160.48
6.38 + 75.97 = 82.34
87.67 + 64.44 = 152.11
13.13 + 21.92 = 35.04
22.63 + 91.89 = 114.52
4.78 + 71.51 = 76.29
71.45 + 63.77 = 135.22
46.89 + 44.33 = 91.22
99.80 + 28.49 = 128.29
36.55 + 55.04 = 91.59
90.40 + 18.50 = 108.90
35.00 + 8.08 = 43.08
37.60 + 21.48 = 59.07
6.05 + 18.81 = 24.86
65.43 + 12.48 = 77.91
62.53 + 29.91 = 92.43
87.12 + 66.05 = 153.17
91.10 + 91.13 = 182.24
19.83 + 68.98 = 88.81
39.62 + 65.20 = 104.82
28.09 + 70.25 = 98.34
71.87 + 75.10 = 146.97
4.91 + 47.17 = 52.07
86.81 + 81.22 = 168.02
25.60 + 47.98 = 73.58
23.30 + 31.94 = 55.24
35.35 + 4.39 = 39.74
91.50 + 32.75 = 124.25
72.90 + 4.44 = 77.33
49.08 + 87.33 = 136.42
99.74 + 89.85 = 189.59
38.99 + 43.50 = 82.50
10.99 + 4.54 = 15.53
85.39 + 88.61 = 174.00
61.85 + 85.43 = 147.28
70.99 + 46.22 = 117.21
65.66 + 64.93 = 130.59
52.46 + 91.11 = 143.57
18.47 + 59.15 = 77.62
74.74 + 84.75 = 159.48
92.37 + 60.34 = 152.71
82.12 + 1.74 = 83.86
29.22 + 46.96 = 76.17
56.00 + 31.16 = 87.16
69.95 + 84.78 = 154.73
99.47 + 57.91 = 157.38
84.09 + 28.49 = 112.57
98.96 + 21.01 = 119.97
33.45 + 58.19 = 91.64
86.75 + 69.91 = 156.66
24.30 + 12.38 = 36.68
66.09 + 59.88 = 125.98
86.86 + 19.34 = 106.21
7.56 + 4.90 = 12.46
82.15 + 96.78 = 178.93
41.27 + 4.37 = 45.64
86.45 + 95.39 = 181.84
19.58 + 40.67 = 60.26
55.34 + 20.66 = 76.00
69.12 + 70.57 = 139.70
35.07 + 88.83 = 123.91
53.89 + 67.17 = 121.06
81.56 + 71.64 = 153.20
93.83 + 73.29 = 167.11
78.41 + 72.55 = 150.96
88.98 + 64.09 = 153.07
28.91 + 65.77 = 94.68
50.40 + 48.94 = 99.34
43.43 + 33.37 = 76.80
97.63 + 32.50 = 130.13
67.71 + 65.11 = 132.83
11.73 + 65.50 = 77.24
10.01 + 54.97 = 64.98
94.84 + 8.74 = 103.58
39.42 + 48.60 = 88.02
44.32 + 72.36 = 116.68
56.03 + 80.62 = 136.65
64.71 + 38.65 = 103.35
88.24 + 1.83 = 90.07
75.95 + 93.43 = 169.38
66.90 + 46.44 = 113.34
94.67 + 40.24 = 134.92
71.03 + 41.45 = 112.48
28.48 + 16.50 = 44.98
49.79 + 25.82 = 75.61
95.05 + 33.08 = 128.14
11.19 + 39.74 = 50.92
18.67 + 82.03 = 100.70
43.53 + 75.55 = 119.08
32.06 + 62.26 = 94.31
12.09 + 64.98 = 77.07
80.39 + 24.48 = 104.87
64.52 + 24.38 = 88.90
52.42 + 95.29 = 147.71
95.73 + 3.31 = 99.04
11.20 + 69.25 = 80.45
79.49 + 94.54 = 174.03
27.71 + 20.01 = 47.72
82.14 + 77.64 = 159.78
96.51 + 38.51 = 135.02
45.54 + 96.95 = 142.49
96.59 + 21.50 = 118.09
75.36 + 29.23 = 104.59
14.36 + 68.84 = 83.20
8.31 + 90.62 = 98.94
32.95 + 66.31 = 99.26
71.32 + 77.65 = 148.98
73.99 + 94.01 = 168.00
98.70 + 47.02 = 145.72
18.20 + 71.97 = 90.17
53.61 + 24.62 = 78.23
91.38 + 95.81 = 187.19
18.83 + 9.82 = 28.66
45.76 + 90.05 = 135.81
92.36 + 17.45 = 109.81
54.75 + 76.28 = 131.03
58.00 + 90.97 = 148.96
35.94 + 80.76 = 116.70
12.26 + 37.70 = 49.95
83.29 + 54.27 = 137.57
28.99 + 93.28 = 122.27
89.27 + 7.27 = 96.53
45.00 + 30.61 = 75.61
32.14 + 39.61 = 71.76
65.65 + 0.66 = 66.31
56.39 + 27.97 = 84.36
32.00 + 41.04 = 73.04
46.80 + 87.88 = 134.68
72.16 + 26.10 = 98.26
52.78 + 14.59 = 67.38
92.95 + 71.36 = 164.31
20.08 + 88.97 = 109.05
64.67 + 58.52 = 123.19
96.22 + 74.53 = 170.75
25.69 + 27.23 = 52.92
54.70 + 92.65 = 147.35
96.00 + 98.68 = 194.68
95.30 + 5.31 = 100.61
53.36 + 66.48 = 119.84
84.70 + 24.07 = 108.77
3.93 + 25.10 = 29.03
67.00 + 59.47 = 126.47
84.02 + 17.10 = 101.12
58.74 + 92.44 = 151.19
73.76 + 80.50 = 154.26
11.52 + 47.88 = 59.40
98.78 + 79.75 = 178.53
38.47 + 46.08 = 84.55
55.76 + 19.20 = 74.96
22.44 + 59.67 = 82.11
33.73 + 80.43 = 114.15
15.04 + 76.78 = 91.81
28.11 + 6.52 = 34.63
60.37 + 26.90 = 87.28
71.56 + 88.99 = 160.54
96.88 + 26.74 = 123.62
46.01 + 10.37 = 56.38
68.19 + 12.10 = 80.29
8.29 + 69.12 = 77.41
71.95 + 1.24 = 73.20
67.49 + 75.95 = 143.45
56.02 + 46.70 = 102.72
10.86 + 75.38 = 86.24
97.51 + 39.99 = 137.50
96.66 + 24.05 = 120.71
34.05 + 98.66 = 132.71
31.16 + 62.92 = 94.08
20.48 + 50.42 = 70.91
34.91 + 63.61 = 98.52
21.36 + 97.28 = 118.64
92.10 + 25.53 = 117.63
81.74 + 56.11 = 137.85
80.83 + 59.15 = 139.99
8.79 + 93.37 = 102.16
11.44 + 27.64 = 39.08
7.16 + 63.23 = 70.39
69.29 + 43.74 = 113.03
4.09 + 82.89 = 86.97
78.87 + 45.87 = 124.74
38.86 + 98.39 = 137.25
90.46 + 18.07 = 108.53
37.39 + 72.18 = 109.57
52.08 + 85.82 = 137.90
9.44 + 20.85 = 30.29
79.30 + 26.32 = 105.62
55.17 + 12.98 = 68.15
87.41 + 89.63 = 177.03
12.70 + 62.25 = 74.95
16.27 + 49.34 = 65.61
80.80 + 85.22 = 166.02
70.61 + 99.98 = 170.59
73.59 + 97.09 = 170.67
29.66 + 5.93 = 35.60
69.86 + 55.80 = 125.66
63.56 + 96.26 = 159.82
70.80 + 96.87 = 167.67
40.44 + 2.67 = 43.12
38.23 + 91.56 = 129.79
32.31 + 68.27 = 100.58
15.05 + 71.29 = 86.33
40.01 + 23.07 = 63.08
91.24 + 54.34 = 145.58
72.24 + 43.42 = 115.67
36.03 + 49.35 = 85.38
41.64 + 96.54 = 138.18
31.88 + 56.49 = 88.38
95.94 + 32.72 = 128.66
81.40 + 3.71 = 85.11
96.18 + 37.95 = 134.13
76.23 + 4.86 = 81.08
99.36 + 11.43 = 110.79
80.73 + 71.33 = 152.06
12.60 + 98.25 = 110.85
54.25 + 11.29 = 65.54
71.94 + 99.91 = 171.84
77.66 + 73.44 = 151.10
74.08 + 16.87 = 90.95
24.07 + 97.95 = 122.02
66.29 + 60.20 = 126.49
83.35 + 88.17 = 171.52
90.22 + 16.53 = 106.74
77.85 + 75.46 = 153.32
93.10 + 74.18 = 167.28
54.26 + 78.74 = 133.01
75.99 + 31.01 = 107.00
67.38 + 22.00 = 89.39
56.82 + 18.69 = 75.50
47.61 + 30.54 = 78.15
98.11 + 6.60 = 104.72
27.53 + 41.53 = 69.07
97.81 + 3.37 = 101.18
57.37 + 99.99 = 157.36
79.39 + 67.79 = 147.18
25.67 + 29.23 = 54.90
56.60 + 86.87 = 143.47
84.12 + 28.60 = 112.72
1.71 + 87.79 = 89.50
15.20 + 22.30 = 37.50
25.74 + 36.95 = 62.69
41.82 + 25.04 = 66.85
98.30 + 54.66 = 152.96
21.31 + 64.22 = 85.53
5.11 + 50.19 = 55.29
54.54 + 68.62 = 123.15
75.84 + 73.52 = 149.36
37.10 + 60.61 = 97.71
26.04 + 96.82 = 122.85
46.48 + 37.10 = 83.58
57.11 + 95.47 = 152.58
58.11 + 54.88 = 112.99
60.10 + 6.49 = 66.58
78.18 + 12.12 = 90.30
84.78 + 13.99 = 98.77
33.58 + 1.61 = 35.19
78.04 + 60.39 = 138.43
32.17 + 65.18 = 97.36
76.90 + 19.27 = 96.17
62.29 + 66.03 = 128.32
74.54 + 5.49 = 80.03
1.19 + 77.54 = 78.73
请按任意键继续. . .

我编译了一下没有问题啊...你是不是头文件搞错了？还是驱动有问题？