在具有 4 个 NVIDIA GPU 的节点上，我在设备 0 上启用了 ECC 内存保护（所有其他都禁用了 ECC）。由于我在设备 0 上启用了 ECC，因此我的应用程序（CUDA，仅使用一个设备）在尝试在此设备 0（驱动程序 API）上创建上下文时挂起。我不知道为什么它会在那个时候挂起。如果我根据另一个设备使用不同的设备设置 CUDA_VISIBLE_DEVICE 它工作正常。它必须与启用 ECC 有关。有什么想法吗？这里的输出nvidia-smi：（为什么它报告 99% 不稳定的 GPU 利用率，那里没有运行？）
+------------------------------------------------------+
| NVIDIA-SMI 4.304.54 Driver Version: 304.54 |
|-------------------------------+----------------------+----------------------+
| GPU Name | Bus-Id Disp. | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 Tesla K20m | 0000:02:00.0 Off | 1 |
| N/A 29C P0 49W / 225W | 0% 12MB / 4799MB | 99% Default |
+-------------------------------+----------------------+----------------------+
| 1 Tesla K20m | 0000:03:00.0 Off | 0 |
| N/A 22C P8 15W / 225W | 0% 12MB / 4799MB | 0% Default |
+-------------------------------+----------------------+----------------------+
| 2 Tesla K20m | 0000:83:00.0 Off | 0 |
| N/A 22C P8 24W / 225W | 0% 11MB / 4799MB | 0% Default |
+-------------------------------+----------------------+----------------------+
| 3 Tesla K20m | 0000:84:00.0 Off | 0 |
| N/A 23C P8 25W / 225W | 0% 11MB / 4799MB | 0% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Compute processes: GPU Memory |
| GPU PID Process name Usage |
|=============================================================================|
| No running compute processes found |
+-----------------------------------------------------------------------------+
编辑：nvidia-smi -a报告在所有设备上启用了 ECC。奇怪的！
==============NVSMI LOG==============
Timestamp : Fri Apr 26 10:18:14 2013
Driver Version : 304.54
Attached GPUs : 4
GPU 0000:02:00.0
Product Name : Tesla K20m
Display Mode : Disabled
Persistence Mode : Enabled
Driver Model
Current : N/A
Pending : N/A
Serial Number : 0324512044699
VBIOS Version : 80.10.11.00.0B
Inforom Version
Image Version : 2081.0208.01.07
OEM Object : 1.1
ECC Object : 3.0
Power Management Object : N/A
GPU Operation Mode
Current : Compute
Pending : Compute
PCI
Bus : 0x02
Device : 0x00
Domain : 0x0000
Device Id : 0x102810DE
Bus Id : 0000:02:00.0
Sub System Id : 0x101510DE
GPU Link Info
PCIe Generation
Max : 2
Current : 2
Link Width
Max : 16x
Current : 16x
Fan Speed : N/A
Performance State : P0
Clocks Throttle Reasons
Idle : Not Active
User Defined Clocks : Not Active
SW Power Cap : Not Active
HW Slowdown : Not Active
Unknown : Not Active
Memory Usage
Total : 4799 MB
Used : 12 MB
Free : 4787 MB
Compute Mode : Default
Utilization
Gpu : 99 %
Memory : 0 %
Ecc Mode
Current : Enabled
Pending : Enabled
ECC Errors
Volatile
Single Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Double Bit
Device Memory : 1
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 1
Aggregate
Single Bit
Device Memory : 1
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 1
Double Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Temperature
Gpu : 29 C
Power Readings
Power Management : Supported
Power Draw : 49.51 W
Power Limit : 225.00 W
Default Power Limit : 225.00 W
Min Power Limit : 150.00 W
Max Power Limit : 225.00 W
Clocks
Graphics : 758 MHz
SM : 758 MHz
Memory : 2600 MHz
Applications Clocks
Graphics : 705 MHz
Memory : 2600 MHz
Max Clocks
Graphics : 758 MHz
SM : 758 MHz
Memory : 2600 MHz
Compute Processes : None
GPU 0000:03:00.0
Product Name : Tesla K20m
Display Mode : Disabled
Persistence Mode : Enabled
Driver Model
Current : N/A
Pending : N/A
Serial Number : 0324512044821
VBIOS Version : 80.10.11.00.0B
Inforom Version
Image Version : 2081.0208.01.07
OEM Object : 1.1
ECC Object : 3.0
Power Management Object : N/A
GPU Operation Mode
Current : Compute
Pending : Compute
PCI
Bus : 0x03
Device : 0x00
Domain : 0x0000
Device Id : 0x102810DE
Bus Id : 0000:03:00.0
Sub System Id : 0x101510DE
GPU Link Info
PCIe Generation
Max : 2
Current : 1
Link Width
Max : 16x
Current : 16x
Fan Speed : N/A
Performance State : P8
Clocks Throttle Reasons
Idle : Active
User Defined Clocks : Not Active
SW Power Cap : Not Active
HW Slowdown : Not Active
Unknown : Not Active
Memory Usage
Total : 4799 MB
Used : 12 MB
Free : 4787 MB
Compute Mode : Default
Utilization
Gpu : 0 %
Memory : 0 %
Ecc Mode
Current : Enabled
Pending : Enabled
ECC Errors
Volatile
Single Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Double Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Aggregate
Single Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Double Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Temperature
Gpu : 19 C
Power Readings
Power Management : Supported
Power Draw : 15.22 W
Power Limit : 225.00 W
Default Power Limit : 225.00 W
Min Power Limit : 150.00 W
Max Power Limit : 225.00 W
Clocks
Graphics : 324 MHz
SM : 324 MHz
Memory : 324 MHz
Applications Clocks
Graphics : 705 MHz
Memory : 2600 MHz
Max Clocks
Graphics : 758 MHz
SM : 758 MHz
Memory : 2600 MHz
Compute Processes : None
GPU 0000:83:00.0
Product Name : Tesla K20m
Display Mode : Disabled
Persistence Mode : Enabled
Driver Model
Current : N/A
Pending : N/A
Serial Number : 0324512044783
VBIOS Version : 80.10.11.00.0B
Inforom Version
Image Version : 2081.0208.01.07
OEM Object : 1.1
ECC Object : 3.0
Power Management Object : N/A
GPU Operation Mode
Current : Compute
Pending : Compute
PCI
Bus : 0x83
Device : 0x00
Domain : 0x0000
Device Id : 0x102810DE
Bus Id : 0000:83:00.0
Sub System Id : 0x101510DE
GPU Link Info
PCIe Generation
Max : 2
Current : 1
Link Width
Max : 16x
Current : 16x
Fan Speed : N/A
Performance State : P8
Clocks Throttle Reasons
Idle : Active
User Defined Clocks : Not Active
SW Power Cap : Not Active
HW Slowdown : Not Active
Unknown : Not Active
Memory Usage
Total : 4799 MB
Used : 11 MB
Free : 4788 MB
Compute Mode : Default
Utilization
Gpu : 0 %
Memory : 0 %
Ecc Mode
Current : Enabled
Pending : Enabled
ECC Errors
Volatile
Single Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Double Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Aggregate
Single Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Double Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Temperature
Gpu : 22 C
Power Readings
Power Management : Supported
Power Draw : 24.74 W
Power Limit : 225.00 W
Default Power Limit : 225.00 W
Min Power Limit : 150.00 W
Max Power Limit : 225.00 W
Clocks
Graphics : 324 MHz
SM : 324 MHz
Memory : 324 MHz
Applications Clocks
Graphics : 705 MHz
Memory : 2600 MHz
Max Clocks
Graphics : 758 MHz
SM : 758 MHz
Memory : 2600 MHz
Compute Processes : None
GPU 0000:84:00.0
Product Name : Tesla K20m
Display Mode : Disabled
Persistence Mode : Enabled
Driver Model
Current : N/A
Pending : N/A
Serial Number : 0324512044628
VBIOS Version : 80.10.11.00.0B
Inforom Version
Image Version : 2081.0208.01.07
OEM Object : 1.1
ECC Object : 3.0
Power Management Object : N/A
GPU Operation Mode
Current : Compute
Pending : Compute
PCI
Bus : 0x84
Device : 0x00
Domain : 0x0000
Device Id : 0x102810DE
Bus Id : 0000:84:00.0
Sub System Id : 0x101510DE
GPU Link Info
PCIe Generation
Max : 2
Current : 1
Link Width
Max : 16x
Current : 16x
Fan Speed : N/A
Performance State : P8
Clocks Throttle Reasons
Idle : Active
User Defined Clocks : Not Active
SW Power Cap : Not Active
HW Slowdown : Not Active
Unknown : Not Active
Memory Usage
Total : 4799 MB
Used : 11 MB
Free : 4788 MB
Compute Mode : Default
Utilization
Gpu : 0 %
Memory : 0 %
Ecc Mode
Current : Enabled
Pending : Enabled
ECC Errors
Volatile
Single Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Double Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Aggregate
Single Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Double Bit
Device Memory : 0
Register File : 0
L1 Cache : 0
L2 Cache : 0
Texture Memory : 0
Total : 0
Temperature
Gpu : 23 C
Power Readings
Power Management : Supported
Power Draw : 25.47 W
Power Limit : 225.00 W
Default Power Limit : 225.00 W
Min Power Limit : 150.00 W
Max Power Limit : 225.00 W
Clocks
Graphics : 324 MHz
SM : 324 MHz
Memory : 324 MHz
Applications Clocks
Graphics : 705 MHz
Memory : 2600 MHz
Max Clocks
Graphics : 758 MHz
SM : 758 MHz
Memory : 2600 MHz
Compute Processes : None