HP-UX IPSec vA.02.00 Performance and Sizing White Paper

CPU Utilization
Figure 5 shows the percentage of the CPU used by the s
ending system. The percentage of the CPU
used with AH-SHA1 is less than the percentage used with AH-MD5.
Figure 5. One-Way Itanium CPU Utilization for Raw IP, AH-MD5, AH-SHA1
Service Demand
Figure 6 shows the service demand rates for AH-MD5 and AH-SHA1, whic
h are much higher than
those for raw IP at small packet sizes. However, the service demand rate drops sharply (efficiency
increases) for both AH-MD5 and AH-SHA1 as the packet size increases.
Figure 6. One-Way, Itanium Service Demand Raw IP, AH-MD5, AH-SHA1
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