HP ML570 - ProLiant - G2 Tuning Manual page 39

Novell NetWare 6 performance tuning guidelines for ProLiant servers
figure 10. effects of hyper-threading on WebBench performance: quad processors
Performance Effects of Hyper-Threading (HT) on WebBench Test
18,000
16,000
14,000
12,000
10,000
8,000
6,000
4,000
2,000
0
1 4 8
Results: With a workload of 60 clients, the ProLiant ML570 G2 server configured with
four processors provided no statistical difference in performance on average with hyper-
threading disabled compared to when hyper-threading was enabled.
Note: It should be pointed out that we have been able to document modest performance
benefits when hyper-threading is enabled on 1P and 2P servers with several applications
running under Microsoft Windows 2000 Server and Linux operating systems.
Table 12 lists the applications and operating systems used in the test run in figures 7 - 10.
table 12. effects of hyper-threading technology used in different operating systems
Application
SpecWeb99
WebBench 4.1
NetBench 7.0.2
MS Exchange
Yes - hyper-threading is beneficial or improves server performance
No - hyper-threading is not beneficial or degrades server performance
For more information about hyper-threading technology, visit
developer.intel.com/pressroom/archive/releases/20010828comp.htm.
(Higher is Better)
12 16 20 24 28 32 36
# of Clients
W2K server Linux 7.x & up
Yes Yes
Yes Yes
Yes Yes
Yes No Data
40 44 48 52 56 60
NetWare 6.0
No data
No
No
No Data
HT-ON
HT-OFF
39