Messages in this thread |  | | | Date | Sat, 03 May 2008 01:13:41 +0200 | | From | Andi Kleen <> | | Subject | Re: HELP: Is writeq an atomic operation?? |
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Moore, Eric wrote: > On Friday, May 02, 2008 4:50 PM, Andi Kleen wrote: >>> Here is a trace from pci express analyzer. I'm sending >> With what CPU/chipset was that? >> > > I'm developing sas driver for next generation controllers. They should > work at least on x86, x86_64, ia64, and ppc64. The host I was using for > gathering that trace was x86_64 Intel Platform. Here is the lspci > output:
I doubt the CPU was to blame. Probably the chipset split it up for some reason. Did you check the data sheets?
At the CPU level writeq is simply a 64bit store on x86-64 Linux.
-Andi
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