CPU spike observed where lots of tasks are calling SEOS_wait_event() and waiting.

Solution Verified - Updated -

Issue

  • CPU spike observed where lots of tasks are calling SEOS_wait_event() and waiting.
PID: 18111  TASK: ffff946a3df1a0e0  CPU: 9   COMMAND: "logmon"
    [exception RIP: native_queued_spin_lock_slowpath+0x1f]
     RIP: ffffffffb3b1740f  RSP: ffff94669a6ffcf8  RFLAGS: 00000293
     RAX: 0000000000000001  RBX: ffffffffc0a414b8  RCX: 0000000000000001
     RDX: 0000000000000000  RSI: 0000000000000001  RDI: ffffffffc0a414b0
     RBP: ffff94669a6ffcf8   R8: 0000000001414141   R9: 0000000000000001
     R10: 0000000000000001  R11: ffff946a612dff00  R12: ffff946a3df1a0e0
     R13: ffffffffc0a414b0  R14: 0000000000000000  R15: ffff946a3df1a0e0
 #0 [ffff94669a6ffd00] queued_spin_lock_slowpath at ffffffffb417544a
 #1 [ffff94669a6ffd10] _raw_spin_lock at ffffffffb4183330
 #2 [ffff94669a6ffd20] SEOS_wait_event at ffffffffc080995a [seos]
 #3 [ffff94669a6ffdb8] eac_get_msg_orwait at ffffffffc07ffd09 [seos]
 #4 [ffff94669a6ffdf0] eac_getfree_msg_wait at ffffffffc07fff13 [seos]
 #5 [ffff94669a6ffe28] eAC_route_file at ffffffffc080152f [seos]
 #6 [ffff94669a6ffe78] SEOS_check_file at ffffffffc0807473 [seos]
 #7 [ffff94669a6ffeb8] check_file_access at ffffffffc0813d80 [seos]
 #8 [ffff94669a6fff08] my_openat at ffffffffc0817de3 [seos]
 #9 [ffff94669a6fff50] system_call_fastpath at ffffffffb418dede
    RIP: 00007fc2fcb27810  RSP: 00007ffc752f9970  RFLAGS: 00000246
    RAX: 0000000000000101  RBX: 0000000002691b00  RCX: 00000000005ee408
    RDX: 0000000000090800  RSI: 00000000007a94e0  RDI: ffffffffffffff9c
    RBP: 0000000000000000   R8: 00007ffc752fb220   R9: 2d20646e6946656c
    R10: 0000000000000000  R11: 0000000000000246  R12: 00007ffc752fb1d0
    R13: 000000000000003e  R14: 00007ffc752fb20e  R15: 00000000027ac1c0
    ORIG_RAX: 0000000000000101  CS: 0033  SS: 002b

Environment

  • Red Hat Enterprise Linux 7.7 (kernel-3.10.0-1062.7.1.el7)
  • seos installed and loaded

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