Intel ARCHITECTURE IA-32 User Manual download pdf (Page 392)

100

101

IA-32 Intel® Architecture Optimization

7-46

Per-instance Stack Offset

Each instance an application runs in its own linear address space; but the

address layout of data for stack segments is identical for the both

instances. When the instances are running in lock step, stack accesses

are likely to cause of excessive evictions of cache lines in the first-level

data cache for some implementations of Hyper-Threading Technology

in IA-32 processors.

Although this situation (two copies of an application running in lock

step) is seldom an objective for multithreaded software or a

multiprocessor platform, it can happen by an end-user’s direction. One

solution is to allow application instance to add a suitable linear

address-offset for its stack. Once this offset is added at start-up, a buffer

of linear addresses is established even when two copies of the same

application are executing using two logical processors in the same

physical processor package. The space has negligible impact on running

dissimilar applications and on executing multiple copies of the same

application.

{ DWORD Stack_offset, ID_Thread1, ID_Thread2, ID_Thread3;

Stack_offset = 1024;

// Stack offset between parent thread and the first child thread.

ID_Thread1 = CreateThread(Func_thread_entry, &Stack_offset);

// Call OS thread API.

Stack_offset = 2048;

ID_Thread2 = CreateThread(Func_thread_entry, &Stack_offset);

Stack_offset = 3072;

ID_Thread3 = CreateThread(Func_thread_entry, &Stack_offset);

}

Example 7-9 Adding an Offset to the Stack Pointer of Three Threads (Contd.)

1 2 ... 387 388 389 390 391 392 393 394 395 396 397 ... 567 568

Comments to this Manuals

No comments

Intel ARCHITECTURE IA-32 User Manual Page 392

Comments to this Manuals

Related products and manuals for Computer Accessories Intel ARCHITECTURE IA-32