Subject RE: [firebird-support] Firebird 1.03 and PIV 3Ghz
Author Richard Pendered
FB is not SMP aware (yet !), so will either task switch, or only use 1 proc,
so set the CPU affinity to 1 to only use 1 processor.

-----Original Message-----
From: Patrick Pellizzari [mailto:pp@...]
Sent: 01 August 2003 09:30
Subject: [firebird-support] Firebird 1.03 and PIV 3Ghz


I have just installed my new PIV 3.0Ghz.
The new technology of the PIV 3Ghz makes it possible to see this PIV like 2
procs (like Xeon)...
With Firebird 1.03, considering which it has a parameter which makes it
possible to tell it on which proc it must work, I make some tests.....

Result of the tests:
On a request which take 2,8S on the PIV 3Ghz :
On a PIV 2.5 Ghz
1 user = 3,079s
3 users = 5,578s 5,172s 5,953s

On a PIV 3.0Gh without modifying the IB config
1 user = 2,813s
3 users = 3,313s 3,609s 5,062s

On a PIV 3.0Gh with CPU_AFFINITY 3
1 user = 2,859s
3 users = 3,187s 5,359s 5,703s

I launched the Taskmanager which shows me well that in the first case alone
1 proc works, and in the 2nd case, both works....
Is what somebody has an idea of why it's not faster when using 2 procs ?

Thank you very much

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