在 128 核上进行大型模拟的内存上的硬件错误

Question

我已经在天体物理学背景下启动了一个大型模拟（enzo 代码），在 128 个内核上执行 MPI，如下所示：

mpirun -np 128 ./enzo.exe amr_cosmology.enzo

并且我在运行ning 期间收到以下错误：它被标记为 Hardware Error，所以我得出结论，总 RAM (1GB) 的内存条是坏的。如您所见，代码并没有停止，但这些错误消息经常出现在所有运行的代码中：

TopGrid dt = 3.705042e-02     time = 1.2350099725762    cycle = 14    z = 834.55610989934
TopGrid dt = 3.816191e-02     time = 1.272060395839    cycle = 15    z = 818.25224654732
TopGrid dt = 3.930675e-02     time = 1.3102223091899    cycle = 16    z = 802.26651295398

Message from syslogd@pablo at Sep 24 20:52:00 ...
 kernel:[2415943.711318] [Hardware Error]: Corrected error, no action required.

Message from syslogd@pablo at Sep 24 20:52:00 ...
 kernel:[2415943.711377] [Hardware Error]: CPU:2 (17:31:0) MC17_STATUS[-|CE|MiscV|-|AddrV|-|-|SyndV|-|CECC]: 0x9c2041000000011b

Message from syslogd@pablo at Sep 24 20:52:00 ...
 kernel:[2415943.711387] [Hardware Error]: Error Addr: 0x0000001c9f3d4ac0

Message from syslogd@pablo at Sep 24 20:52:00 ...
 kernel:[2415943.711388] [Hardware Error]: IPID: 0x0000009600450f00, Syndrome: 0x0f5940000a801001

Message from syslogd@pablo at Sep 24 20:52:00 ...
 kernel:[2415943.711399] [Hardware Error]: Unified Memory Controller Extended Error Code: 0

Message from syslogd@pablo at Sep 24 20:52:00 ...
 kernel:[2415943.711407] [Hardware Error]: Unified Memory Controller Error: DRAM ECC error.

Message from syslogd@pablo at Sep 24 20:52:00 ...
 kernel:[2415943.711422] [Hardware Error]: cache level: L3/GEN, tx: GEN, mem-tx: RD

Message from syslogd@pablo at Sep 24 20:52:00 ...
 kernel:[2415943.711474] [Hardware Error]: Corrected error, no action required.

Message from syslogd@pablo at Sep 24 20:52:00 ...
 kernel:[2415943.711479] [Hardware Error]: CPU:2 (17:31:0) MC18_STATUS[Over|CE|MiscV|-|AddrV|-|-|SyndV|-|CECC]: 0xdc2041000000011b

Message from syslogd@pablo at Sep 24 20:52:00 ...
 kernel:[2415943.711483] [Hardware Error]: Error Addr: 0x0000001ee2f9b140

Message from syslogd@pablo at Sep 24 20:52:00 ...
 kernel:[2415943.711484] [Hardware Error]: IPID: 0x0000009600550f00, Syndrome: 0xda9020000a800d01

Message from syslogd@pablo at Sep 24 20:52:00 ...
 kernel:[2415943.711489] [Hardware Error]: Unified Memory Controller Extended Error Code: 0

Message from syslogd@pablo at Sep 24 20:52:00 ...
 kernel:[2415943.711492] [Hardware Error]: Unified Memory Controller Error: DRAM ECC error.

Message from syslogd@pablo at Sep 24 20:52:00 ...
 kernel:[2415943.711497] [Hardware Error]: cache level: L3/GEN, tx: GEN, mem-tx: RD
TopGrid dt = 4.048593e-02     time = 1.3495290567141    cycle = 17    z = 786.59270291163
TopGrid dt = 4.170048e-02     time = 1.3900149827028    cycle = 18    z = 771.22472945212
TopGrid dt = 4.295147e-02     time = 1.4317154617942    cycle = 19    z = 756.15662471201

这是什么错误：是自动更正还是硬件故障？总之，有点不对劲。

Answer 1

这是由于 RAM 故障造成的。频繁的 ECC 纠错（如您的情况）定义了故障硬件。修复是找出导致此问题的内存并更换它。如果它不是关键系统，您可能不需要立即修复它。

在某些情况下，未按预期频率工作的 RAM 也会导致此问题。

有关详细信息，请参阅参考资料。 Ref 1, Ref 2, Ref 3

在 128 核上进行大型模拟的内存上的硬件错误

Hardware errors on Memory with a large simulation on 128 cores

memory

mpi

hardware

distributed-computing

ram