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| Sun System Handbook - ISO 3.4 June 2011 Internal/Partner Edition | ||
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Solution Type Technical Instruction Sure Solution 1012272.1 : Why the psrinfo command shows twice as many CPUs in my Sun Fire[TM]V60x/65x as are physically installed.
PreviouslyPublishedAs 216930 Description My Sun Fire[TM] V60x contains two physical processors. Running the psrinfo(1M) command however appears to show details of four physical processors. This document explains why this occurs. Steps to Follow The V60x and V65x servers support Intel Xeon processors which can utilize "Hyper-Threading". This allows the processor to execute threads in parallel and in Solaris[TM] it can make one physical processor show up as two. Hyper-Threading can be enabled/disabled in the bios on the V60x and V65x servers. To control this press the F2 key at power up to enter the bios setup menu. In the "Main" menu use the down arrow to highlight "Processor Settings" and press return. On the processor screen you will see a line for "Hyper-Threading Technology" and it will show the server's current setting (enabled/disabled). If you want to change its value arrow down to this line and press return. Here is an example of the output of "psrinfo -v" on a two processor V60x server when "Hyper-Threading" is enabled: (note- this example is from a system running Solaris[TM] 9 8/03) # psrinfo -v Status of processor 0 as of: 04/12/2004 15:14:41 Processor has been on-line since 04/09/2004 13:46:50. The i386 processor operates at 3190 MHz, and has an i387 compatible floating point processor. Status of processor 1 as of: 04/12/2004 15:14:41 Processor has been on-line since 04/09/2004 13:46:51. The i386 processor operates at 3190 MHz, and has an i387 compatible floating point processor. Status of processor 2 as of: 04/12/2004 15:14:41 Processor has been on-line since 04/09/2004 13:46:53. The i386 processor operates at 3190 MHz, and has an i387 compatible floating point processor. Status of processor 3 as of: 04/12/2004 15:14:41 Processor has been on-line since 04/09/2004 13:46:55. The i386 processor operates at 3190 MHz, and has an i387 compatible floating point processor. Product Sun Fire V60x Server Sun Fire V65x Server xeon, v60x, v65x, psrinfo, hyper-threading Previously Published As 75457 Change History Date: 2004-04-14 User Name: 25440 Action: Approved Comment: Few edits for style (made "v60/V60" consistent, mainly), plus added [TM]. Publishing Version: 0 Date: 2004-04-14 User Name: 25440 Action: Accepted Comment: Version: 0 Date: 2004-04-12 User Name: 112402 Action: Approved Comment: Very informative tech document, I'm sure it will be utilized as the v60 servers roll out to cu's. Version: 0 Date: 2004-04-12 User Name: 11510 Action: Approved Product_uuid 03728cec-0ee3-11d7-9be8-dd41f651e0a3|Sun Fire V60x Server 079e9bbc-0ee3-11d7-8c50-f1061905b56f|Sun Fire V65x Server Attachments This solution has no attachment |
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