operating system - what does mellanox interrupt mlx4-async@pci:0000 ... means? -


i'm using infiniband mellanox card [connectx vpi pcie 2.0 5gt/s - ib qdr / 10gige] ofed version 4-1.0.0 on ubuntu 3.13.0 running on x86_64 computer 4 cores.

here result of ibstat on computer

ca 'mlx4_0' ca type: mt26428 number of ports: 1 firmware version: 2.8.600 hardware version: b0 node guid: 0x0002c903004d58ee system image guid: 0x0002c903004d58f1 port 1:     state: active     physical state: linkup     rate: 40     base lid: 1     lmc: 0     sm lid: 1     capability mask: 0x02510868     port guid: 0x0002c903004d58ef     link layer: infiniband

and /proc/interrupts looks :

  67:      17923       4654          0          0   pci-msi-edge      mlx4-async@pci:0000:01:00.0   68:      26696          0         54          0   pci-msi-edge      mlx4_0-0   69:          0         34         23          0   pci-msi-edge      mlx4_0-1   70:          0          0          0          0   pci-msi-edge      mlx4_0-2   71:          0          0          0          0   pci-msi-edge      mlx4_0-3

i read each mlx4_0-x interrupts associated each cpu. question : first interrupt mlx4-async@pci:0000:01:00.0 means ? experiment when opensm deamon not yet running, interrupt occur every 5 minutes.

mlx4-async used asynchronous events other completion events, e.g. link events, catastrophic events, cq overrun, etc.

the interrupt handled adapter driver , depending on event different modules activated, such link event notifications or cleanups due asynchronous errors.


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