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The Unabridged Pentium 4 IA32 Processor Genealogy
book

The Unabridged Pentium 4 IA32 Processor Genealogy

by Tom Shanley, Bob Colwell
July 2004
Intermediate to advanced
1744 pages
35h 3m
English
Addison-Wesley Professional
Content preview from The Unabridged Pentium 4 IA32 Processor Genealogy

Another Example—Awaiting an Event

Task Issues Call to OS for Disk Read

The application program calls the OS requesting that a block of data be read from a disk drive into memory. Once a disk read request is forwarded to the disk interface, the disk read/write head mechanism must be positioned over the target disk cylinder. This is a lengthy mechanical process typically requiring milliseconds to complete. When the head mechanism has positioned the read/write heads over the target cylinder, the disk interface must then wait for the start sector of the requested block to be presented under the read head. The duration of this delay is defined by the rotational speed of the disk drive as well as the circumference of the cylinder. Once again, this ...

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Publisher Resources

ISBN: 032124656XPurchase book