3Com 3C63400-3AC-C - PathBuilder S700 Switch, Reference Manual, Page: 190 / 272

176 C
HAPTER
5: C
ONFIGURING
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ATH
B
UILDER
S700 M
ODULES
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ORTS
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PPLICATIONS
QSIM/HSIM/FAM Performance at Small Frame Sizes
Note that this section pertains to QSIM, HSIM, and FAM performance with traffic
running at small frame sizes. Table 37, Table 38, and Table 39 describe the
configurations supported when the QSIM, HSIM, and FAM, respectively, are
running at small frame sizes.
In general, the maximum total throughput for the QSIM/HSIM/FAM is 31250
packets per second (pps). This is for full duplex traffic. Cases involving small size
frames requires high processing capacity when compared to that of large size
frames. With small size frames, test results show the PPS performance listed in the
following tables. Note that the maximum PPS is 31250.
Table 37 QSIM Performance at Small Frame Sizes
CLK rate
(MHz)
Frame
Size
(Byte) Data Rate
for port
(Mbps)
Max.Packet
rate for
port
(pps)
number of
active ports
packet rate
for card
(duplex)
(pps)
2 64 2 3906 4 31248
4 64 4 7751 2 31004
64 4 1504 4 12032
128 4 635 4 5080
256 4 830 4 6640
8 64 8 9435 1 18870
64 8 1757 2 7028
64 8 977 3 5862
64 8 937 4 7496
128 8 215 4 1720
256 8 147 4 1176