Bug ID 697878: High crypto request completion time under some workload patterns

Last Modified: Nov 07, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP APM, GTM, LTM, vCMP(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:

Opened: Dec 06, 2017
Severity: 2-Critical


The tmctl tmm/crypto table shows heavily loaded bulk crypto queues backed up into associated waiting queue. The crypto requests continue to complete, but are significantly delayed.


Crypto requests can be delayed as long as 1.5 seconds.


High crypto usage often in conjunction with high compression usage.


Disable hardware crypto by setting the "crypto.hwacceleration" DB key to "disable": tmsh modify sys db crypto.hwacceleration value disable

Fix Information

Improve accelerated crypto poll-timing calculation.

Behavior Change