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Bug #1081

closed
AG EL

100% CPU utilization with suricata 2.0 beta2+

Bug #1081: 100% CPU utilization with suricata 2.0 beta2+

Added by Alessandro Guido over 12 years ago. Updated over 12 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Eric Leblond
Target version:
2.0rc1
Affected Versions:
Effort:
Difficulty:
Label:

Description

Commmit 98e4a14f6d59fe8928fd6e2af3d9c3e8b42d00bf (af-packet: update packet reading loop logic)
breaks suricata in afpacket mode (with workers).
Every worker thread is stuck at 100%.
Reverting this commit makes CPU utilization return to usual levels.

Apparently it seems at least the new check logic introduced by that commit
is buggy:

if (h.h2->tp_status & (TP_STATUS_KERNEL|TP_STATUS_USER_BUSY))

actually becomes

if (h.h2->tp_status & TP_STATUS_USER_BUSY)

because TP_STATUS_KERNEL is defined as 0.

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