Windows operating System on uni-processor Vs Multi-processor syste
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From: Prakash Manannavar on 12 Aug 2010 02:48 Hi all, I have some confusions regarding the uni-processor operating system and multi-processor operating system. 1. Is there any change in the architecture of the OS? 2. How the Interrupt scheduling and DPC handling done? Kindly give some information regarding the above. -- ~~~~~ Prakash A Manannavar, Bangalore/Bengaluru.
From: Maxim S. Shatskih on 12 Aug 2010 03:06 > 1. Is there any change in the architecture of the OS? Yes, for instance, in SMP OS, everything is protected by the spinlocks :-) For a better answer, read any classic book on OS development. > 2. How the Interrupt scheduling and DPC handling done? (A)PIC decides what CPU to interrupt in each particular case. With MSI, the hardware device itself (APIC is not used) makes this decision. DPC is usually scheduled on the same CPU where ISR is running. -- Maxim S. Shatskih Windows DDK MVP maxim(a)storagecraft.com http://www.storagecraft.com
From: m on 12 Aug 2010 18:25 IIRC in modern versions of Windows, the UP kernel is obsolete and the multi-processor kernel is used on all hardware. "Maxim S. Shatskih" <maxim(a)storagecraft.com.no.spam> wrote in message news:OcOcwzeOLHA.6100(a)TK2MSFTNGP05.phx.gbl... >> 1. Is there any change in the architecture of the OS? > > Yes, for instance, in SMP OS, everything is protected by the spinlocks :-) > > For a better answer, read any classic book on OS development. > >> 2. How the Interrupt scheduling and DPC handling done? > > (A)PIC decides what CPU to interrupt in each particular case. > > With MSI, the hardware device itself (APIC is not used) makes this > decision. > > DPC is usually scheduled on the same CPU where ISR is running. > > -- > Maxim S. Shatskih > Windows DDK MVP > maxim(a)storagecraft.com > http://www.storagecraft.com >
From: Maxim S. Shatskih on 13 Aug 2010 05:45
Yes, on Vista+ -- Maxim S. Shatskih Windows DDK MVP maxim(a)storagecraft.com http://www.storagecraft.com "m" <m(a)b.c> wrote in message news:OaDhG1mOLHA.5700(a)TK2MSFTNGP04.phx.gbl... > IIRC in modern versions of Windows, the UP kernel is obsolete and the > multi-processor kernel is used on all hardware. > > > "Maxim S. Shatskih" <maxim(a)storagecraft.com.no.spam> wrote in message > news:OcOcwzeOLHA.6100(a)TK2MSFTNGP05.phx.gbl... >>> 1. Is there any change in the architecture of the OS? >> >> Yes, for instance, in SMP OS, everything is protected by the spinlocks :-) >> >> For a better answer, read any classic book on OS development. >> >>> 2. How the Interrupt scheduling and DPC handling done? >> >> (A)PIC decides what CPU to interrupt in each particular case. >> >> With MSI, the hardware device itself (APIC is not used) makes this >> decision. >> >> DPC is usually scheduled on the same CPU where ISR is running. >> >> -- >> Maxim S. Shatskih >> Windows DDK MVP >> maxim(a)storagecraft.com >> http://www.storagecraft.com >> |