Hyper Threaded P4

Author	Message
tickopa Send message Joined: 8 Apr 02 Posts: 17 Credit: 62,691 RAC: 0	Message 124615 - Posted: 17 Jun 2005, 17:08:17 UTC The Task Manager shows a pair of setiathome_4.09 processes each at between about 45% to 49% of CPU time. Boinc manager shows a pair of work units running at the same time but the progress numbers are different. The question, is each work unit shared between the two processor threads or is each work unit allocated to one thread ? ID: 124615 ·

John McLeod VII Volunteer developer Volunteer tester Send message Joined: 15 Jul 99 Posts: 24806 Credit: 790,712 RAC: 0	Message 124619 - Posted: 17 Jun 2005, 17:12:59 UTC - in response to Message 124615. The Task Manager shows a pair of setiathome_4.09 processes each at between about 45% to 49% of CPU time. Boinc manager shows a pair of work units running at the same time but the progress numbers are different. The question, is each work unit shared between the two processor threads or is each work unit allocated to one thread ? Processor affinity is not set. I believe that this means that the processes will normally stay with the CPU that they start on, but they could swap of both be on the same one for a bit if a higher priority task takes over one of the CPUs (virtual or real). BOINC WIKI ID: 124619 ·

Pepo Volunteer tester Send message Joined: 5 Aug 99 Posts: 308 Credit: 418,019 RAC: 0	Message 124626 - Posted: 17 Jun 2005, 17:28:01 UTC - in response to Message 124619. The Task Manager shows a pair of setiathome_4.09 processes each at between about 45% to 49% of CPU time. Boinc manager shows a pair of work units running at the same time but the progress numbers are different. The question, is each work unit shared between the two processor threads or is each work unit allocated to one thread ? Processor affinity is not set. I believe that this means that the processes will normally stay with the CPU that they start on, but they could swap of both be on the same one for a bit if a higher priority task takes over one of the CPUs (virtual or real). A work unit is allocated to one thread. The thread could possibly move between the processors, until the affinity is set. ID: 124626 ·

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