Nortel Symposium Agent, Справочное руководство

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Understanding client features Standard 2.0
34 Nortel Networks Symposium Agent
TAPI Server CPU vrs. Call Rate
y = 0.0172x
R
2
= 0.9801
0
50
100
150
200
250
300
0 5000 10000 15000
CPH
CPU-Sec in 1 Hour
CPU-Sec in 1 hour
Linear (CPU-Sec in
1 hour)
CPU loading model
The test results show linear scaling of CPU usage with call load. CPU calibration
values based on the above analysis are summarized in Table 1.
Table 1
The equation for CPU estimation is given by:
( )
BaseCPU CPU scale U
CPU
, *
3600





 +
=
λµ
υ
where
ν
is the no-load CPU ,
λ
is the call rate in CPH and
µ
is the CPU cost per
call in CPU-Sec. Scale() is a scaling factor that scales the utilization to any
processor desired (CPU) using the measured or base processor (Base CPU).
Scaling factors are shown in Table 2.
Internal Name Measured Scaled to
Processor Memory Units Value PII400
SA_NL PII400 256 % 10% 10%
TAPI_NL PII400 256 % 1% 1%
SA_CPU PII400 256 CPU-Sec 0.0216 0.0216
TAPI_CPU PII400 256 CPU-Sec 0.0172 0.0172
Measured Platform