I am having a super weird behavior ... The CPU load of my computer goes through the roof (>4 on a 8core machine) but there is no process that is taking much CPU (see attached image) Though the 8 core of the machine are experiencing high load (htop shows them all being in between 30-70% oscillating.
This behavior appears after X minutes of using the computer (random, ranging from a couple minutes to a couple hours). Moreover, after this happened, the computer will eventually come to a freeze.
I am at loss here, I had this problem on 15.04, updated to 15.10, same.
The machine has those parts: Motherboard : Asus Z10PE-D8WS CPU: Intel(R) Xeon(R) CPU E5-1620 v3 @ 3.50GHz RAM: 2x Kingston 16Go PC4-2133 CL15 - ECC Registered (KVR21R15D4/16) HDD: 2x 2To ATA ST2000DM001-1ER1 in Raid 0
The only odd thing I found was those lines in the kernel log:
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
with those lines repeating a lot
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
spaced by some
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)
Help !