我遇到了一种非常奇怪的现象...我的计算机的 CPU 负载急剧上升（8 核机器上为 >4），但没有任何进程占用太多 CPU（见附图）尽管机器的 8 个核心负载很高（htop 显示它们的负载都在 30-70% 之间波动。
这种现象会在使用电脑X分钟后出现（随机，从几分钟到几小时不等）。而且，这种情况发生后，电脑最终会死机。
我很困惑，我在 15.04 上遇到了这个问题，更新到 15.10 后还是一样。
该机器有以下部件：主板：华硕 Z10PE-D8WS CPU：英特尔（R）至强（R）CPU E5-1620 v3 @ 3.50GHz 内存：2x 金士顿 16Go PC4-2133 CL15 - ECC Registered（KVR21R15D4/16） 硬盘：2x 2To ATA ST2000DM001-1ER1 在 Raid 0 中
我发现的唯一奇怪的事情是内核日志中的这些行：
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17386.894665] CMCI storm detected: switching to poll mode
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17387.299974] EDAC MC0: 4 CE memory read error on CPU_SrcID#0_Ha#0_Chan#1_DIMM#0 (channel:1 slot:0 page:0x1042 offset:0x100 grain:32 syndrome:0x0 - OVERFLOW area:DRAM err_code:0001:0090 socket:0 ha:0 channel_mask:2 rank:0)
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17387.299989] EDAC MC0: 4 CE memory read error on CPU_SrcID#0_Ha#0_Chan#0_DIMM#0 (channel:0 slot:0 page:0x85392b offset:0xa80 grain:32 syndrome:0x0 - OVERFLOW area:DRAM err_code:0001:0090 socket:0 ha:0 channel_mask:1 rank:1)
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17387.299999] EDAC MC0: 2 CE memory read error on CPU_SrcID#0_Ha#0_Chan#1_DIMM#0 (channel:1 slot:0 page:0x850da9 offset:0x580 grain:32 syndrome:0x0 - OVERFLOW area:DRAM err_code:0001:0090 socket:0 ha:0 channel_mask:2 rank:1)
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17387.300009] EDAC MC0: 3 CE memory read error on CPU_SrcID#0_Ha#0_Chan#1_DIMM#0 (channel:1 slot:0 page:0x85f599 offset:0x100 grain:32 syndrome:0x0 - OVERFLOW area:DRAM err_code:0001:0090 socket:0 ha:0 channel_mask:2 rank:1)
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17387.300018] EDAC MC0: 3 CE memory read error on CPU_SrcID#0_Ha#0_Chan#1_DIMM#0 (channel:1 slot:0 page:0x11b2 offset:0x780 grain:32 syndrome:0x0 - OVERFLOW area:DRAM err_code:0001:0090 socket:0 ha:0 channel_mask:2 rank:0)
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17387.300022] EDAC MC0: 2 CE Error at MMIOH area, on addr 0x000000087fd43a40 on any memory ( page:0x0 offset:0x0 grain:32 syndrome:0x0)
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17387.300032] EDAC MC0: 1 CE memory read error on CPU_SrcID#0_Ha#0_Chan#1_DIMM#0 (channel:1 slot:0 page:0x8474e2 offset:0xf00 grain:32 syndrome:0x0 - area:DRAM err_code:0001:0090 socket:0 ha:0 channel_mask:2 rank:0)
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17387.300042] EDAC MC0: 1 CE memory read error on CPU_SrcID#0_Ha#0_Chan#1_DIMM#0 (channel:1 slot:0 page:0x8476f8 offset:0xd80 grain:32 syndrome:0x0 - area:DRAM err_code:0001:0090 socket:0 ha:0 channel_mask:2 rank:1)
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17387.300051] EDAC MC0: 2 CE memory read error on CPU_SrcID#0_Ha#0_Chan#1_DIMM#0 (channel:1 slot:0 page:0x8466eb offset:0x500 grain:32 syndrome:0x0 - OVERFLOW area:DRAM err_code:0001:0090 socket:0 ha:0 channel_mask:2 rank:1)
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17387.300060] EDAC MC0: 1 CE memory read error on CPU_SrcID#0_Ha#0_Chan#1_DIMM#0 (channel:1 slot:0 page:0x846b23 offset:0x7c0 grain:32 syndrome:0x0 - area:DRAM err_code:0001:0090 socket:0 ha:0 channel_mask:2 rank:0)
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17387.300070] EDAC MC0: 1 CE memory read error on CPU_SrcID#0_Ha#0_Chan#0_DIMM#0 (channel:0 slot:0 page:0x846b23 offset:0xcc0 grain:32 syndrome:0x0 - area:DRAM err_code:0001:0090 socket:0 ha:0 channel_mask:1 rank:0)
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17387.300080] EDAC MC0: 1 CE memory read error on CPU_SrcID#0_Ha#0_Chan#0_DIMM#0 (channel:0 slot:0 page:0x846d32 offset:0xe40 grain:32 syndrome:0x0 - area:DRAM err_code:0001:0090 socket:0 ha:0 channel_mask:1 rank:0)
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17387.300089] EDAC MC0: 2 CE memory read error on CPU_SrcID#0_Ha#0_Chan#0_DIMM#0 (channel:0 slot:0 page:0x5c251b offset:0x640 grain:32 syndrome:0x0 - OVERFLOW area:DRAM err_code:0001:0090 socket:0 ha:0 channel_mask:1 rank:1)
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17387.300099] EDAC MC0: 1 CE memory read error on CPU_SrcID#0_Ha#0_Chan#1_DIMM#0 (channel:1 slot:0 page:0x8474e3 offset:0x1c0 grain:32 syndrome:0x0 - area:DRAM err_code:0001:0090 socket:0 ha:0 channel_mask:2 rank:0)
Feb 15 18:46:02 XXXX-Z10PE-D8-WS kernel: [17387.300108] EDAC MC0: 1 CE memory read error on CPU_SrcID#0_Ha#0_Chan#1_DIMM#0 (channel:1 slot:0 page:0x847711 offset:0xf40 grain:32 syndrome:0x0 - area:DRAM err_code:0001:0090 socket:0 ha:0 channel_mask:2 rank:0)
Feb 15 18:46:03 XXXX-Z10PE-D8-WS kernel: [17387.891537] EDAC sbridge MC0: HANDLING MCE MEMORY ERROR
Feb 15 18:46:03 XXXX-Z10PE-D8-WS kernel: [17387.891561] EDAC sbridge MC0: CPU 0: Machine Check Event: 0 Bank 7: cc08388000010090
Feb 15 18:46:03 XXXX-Z10PE-D8-WS kernel: [17387.891566] EDAC sbridge MC0: TSC 0
Feb 15 18:46:03 XXXX-Z10PE-D8-WS kernel: [17387.891569] EDAC sbridge MC0: ADDR 87fc60500 EDAC sbridge MC0: MISC 14032b286
Feb 15 18:46:03 XXXX-Z10PE-D8-WS kernel: [17387.891576] EDAC sbridge MC0: PROCESSOR 0:306f2 TIME 1455579963 SOCKET 0 APIC 0
Feb 15 18:46:03 XXXX-Z10PE-D8-WS kernel: [17388.299184] EDAC MC0: 8418 CE Error at MMIOH area, on addr 0x000000087fc60500 on any memory ( page:0x0 offset:0x0 grain:32 syndrome:0x0)
Feb 15 18:51:03 XXXX-Z10PE-D8-WS kernel: [17687.707744] CMCI storm subsided: switching to interrupt mode
这些台词重复了很多次
Feb 15 19:07:47 XXXX-Z10PE-D8-WS kernel: [18691.236569] EDAC sbridge MC0: HANDLING MCE MEMORY ERROR
Feb 15 19:07:47 XXXX-Z10PE-D8-WS kernel: [18691.236586] EDAC sbridge MC0: CPU 0: Machine Check Event: 0 Bank 7: cc00064000010090
Feb 15 19:07:47 XXXX-Z10PE-D8-WS kernel: [18691.236589] EDAC sbridge MC0: TSC 0
Feb 15 19:07:47 XXXX-Z10PE-D8-WS kernel: [18691.236592] EDAC sbridge MC0: ADDR 103fb00 EDAC sbridge MC0: MISC 4062e286
Feb 15 19:07:47 XXXX-Z10PE-D8-WS kernel: [18691.236597] EDAC sbridge MC0: PROCESSOR 0:306f2 TIME 1455581267 SOCKET 0 APIC 0
间隔一些
Feb 15 19:07:48 XXXX-Z10PE-D8-WS kernel: [18692.381405] EDAC MC0: 26415 CE memory read error on CPU_SrcID#0_Ha#0_Chan#0_DIMM#0 (channel:0 slot:0 page:0x1042 offset:0xa00 grain:32 syndrome:0x0 - OVERFLOW area:DRAM err_code:0001:0090 socket:0 ha:0 channel_mask:1 rank:0)
Feb 15 19:07:48 XXXX-Z10PE-D8-WS kernel: [18692.381481] EDAC MC0: 4 CE memory scrubbing error on CPU_SrcID#0_Ha#0_Chan#0_DIMM#0 (channel:0 slot:0 page:0x7c5acf offset:0x0 grain:32 syndrome:0x0 - OVERFLOW area:DRAM err_code:0008:00c1 socket:0 ha:0 channel_mask:1 rank:1)
帮助 ！
答案1
仍在跟踪此问题？似乎您的内存模块有问题，机器暂停等待硬件自行纠正此错误。您可能需要尝试移除或更换第一个 CPU、第二个通道和第一个插槽处的内存。请参考：https://serverfault.com/questions/569289/server-freezes-completely-in-unknown-condition
希望能帮助到你。
答案2
谢谢你提醒我完成这件事！
确实，看了这些行之后，我注意到：slot:0 是问题所在。我以为是内存坏了，就把它拔了出来（插槽是由主板分配的，或者至少在我的主板上，插槽 0 是主板的插槽 1）
于是我把它拿出来，测试了 48 小时，没有出现任何错误。将 RAM 送去保修，拿回了一个新的。
仙境里一切都是完美的！