HP Server rp4440 TCP Segmentation Offload (TSO) Performance On HP rp4440 Serve
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- HP Server rp4440 | TCP Segmentation Offload (TSO) Performance On HP rp4440 Serve - Page 1
TCP Segmentation Offload (TSO) Performance On HP rp4440 Servers Using PCI-X 2-Port Gigabit Ethernet Cards Table of Contents August 2004 Introduction ...3 rp4440 Performance with GigE and TSO 5 Service Demand: Less = More 6 Throughput: Faster = Better 7 Performance Highlights 8 Suggested - HP Server rp4440 | TCP Segmentation Offload (TSO) Performance On HP rp4440 Serve - Page 2
- HP Server rp4440 | TCP Segmentation Offload (TSO) Performance On HP rp4440 Serve - Page 3
TCP Segmentation Offload (TSO) capabilities in conjunction with the new A7011A and A7012A 2-port Gigabit Ethernet cards (Figure 1) in a powerful server such as the HP rp4440. TSO works especially well in networks sending large amounts of data, such as in: web serving applications, data backups, or - HP Server rp4440 | TCP Segmentation Offload (TSO) Performance On HP rp4440 Serve - Page 4
protection would require four single-port I/O cards that would consume twice the number of I/O slots. The cards also fully support HP Serviceguard supporting distances of up to 100m. HP rp4440 servers like the one used in this demonstration are highly dependable, adaptable, and efficient servers - HP Server rp4440 | TCP Segmentation Offload (TSO) Performance On HP rp4440 Serve - Page 5
Performance with GigE and TSO Efficiency of the HP rp4440 server with TSO over PCI-X 2-port Gigabit Ethernet A7011A and A7012A cards is best demonstrated through tests that show: • Service Demand. Service demand is the amount of time (in microseconds) it takes one CPU to handle one kilobyte of - HP Server rp4440 | TCP Segmentation Offload (TSO) Performance On HP rp4440 Serve - Page 6
Demand: Less = More Service Demand: Less = More Figure 2 rp4440 Service Demand with GigE and TSO Figure 2 shows Service Demand results on the rp4440 over GigE both without and with TSO. Service Demand is the amount of time it takes one CPU to handle one kilobyte of data. In this test, the - HP Server rp4440 | TCP Segmentation Offload (TSO) Performance On HP rp4440 Serve - Page 7
Throughput with GigE and TSO Figure 3 shows transmit and bidirectional throughput results on the rp4440 over GigE both without and with TSO. In the enclosed graph, the Gigabit Ethernet throughput numbers are shown in Megabits per second. In this test, - HP Server rp4440 | TCP Segmentation Offload (TSO) Performance On HP rp4440 Serve - Page 8
traffic over multiple ports of the A7011A/A7012A GigE cards, TSO reduces service demand by up to 30% while improving bidirectional throughput by up to 577 Mbit/s. When installed in a 4-way HP rp4440 server, the A7011A and A7012A cards provide exceptional networking throughput, connectivity, and - HP Server rp4440 | TCP Segmentation Offload (TSO) Performance On HP rp4440 Serve - Page 9
requirements, the GigE product you use with TSO provides the following choices: • If you want optimum system service demand: both drivers and the cards they support will reduce service port GigE core I/O card on the rx4640 server. The igelan driver supports A6825A copper and A6847A fiber GigE cards, - HP Server rp4440 | TCP Segmentation Offload (TSO) Performance On HP rp4440 Serve - Page 10
used for the performance measurement tests: Table 1 Products Used in the Performance Measurement Tests Server Tested Card Tested rp4440 Server. 800 MHz CPU 4-way 16 GB RAM Operating System - HP-UX 11i version 1 (B.11.11.0312). Prerequisite software - The TOUR 2.0 (transport software) needs to - HP Server rp4440 | TCP Segmentation Offload (TSO) Performance On HP rp4440 Serve - Page 11
PHNE_30279 in order to enable this functionality. Also note that this functionality is disabled by default on HP-UX 11i v2.0 and can be enabled/disabled on a per interface basis. For further assistance including a detailed analysis of your specific requirements and needs, please contact your local - HP Server rp4440 | TCP Segmentation Offload (TSO) Performance On HP rp4440 Serve - Page 12
to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors
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August 2004
Table of Contents
Introduction
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3
rp4440 Performance with GigE and TSO
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5
Service Demand: Less = More
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6
Throughput: Faster = Better
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7
Performance Highlights
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8
Suggested Use
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8
Achieving High Availability with 2-Port Cards
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8
Technology Combinations to Use or to Be Aware Of
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9
Test Details
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10
Products Used in Testing
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10
Test Configuration
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11
For More Information
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11
Taking the Next Step
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11
Legal Notices
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12
TCP Segmentation Offload (TSO) Performance
On HP rp4440 Servers
Using PCI-X 2-Port Gigabit Ethernet Cards