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Is Parallel Programming Hard, And If So, What Can You Do About It?

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Makefile 1.52% C 19.91% Shell 8.64% Propeller Spin 1.49% TeX 67.65% Perl 0.76% Dockerfile 0.03%

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[whymb] Missing writeback

Before CPU0 can mark its cache line as "shared", the line must be written back to main memory to prevent data loss. It is worth mentioning here as long as we are concerned with main memory at all.

perfbook/appendix/whymb/whymemorybarriers.tex

Lines 792 to 796 in 1dd2b89

 \item CPU~0 receives the ``read'' message, and transmits the 

 cache line containing the now-updated value of ``b'' 

 to CPU~1, also marking the line as ``shared'' in its own cache. 

 \item CPU~1 receives the cache line containing ``b'' and installs 

 it in its cache.

perfbook/appendix/whymb/whymemorybarriers.tex

Lines 892 to 898 in 1dd2b89

 \item CPU~0 receives the ``acknowledgement'' message, and puts 

 the cache line containing ``b'' into the ``exclusive'' state. 

 CPU~0 now stores the new value of ``b'' into the cache line. 

 \item CPU~0 receives the ``read'' message, and transmits the 

 cache line containing the new value of ``b'' 

 to CPU~1. 

 It also marks its own copy of this cache line as ``shared''.

how to compile Sample Source Code

Just entering perfbook/CodeSamples and make？
There's lots of error.

Error 127 is not a good error message

this happen when inkscape crashs, could you to change for a better expressive message ?
advsync/irq.svg --> advsync/irq.pdf
make: *** [Makefile:467: advsync/irq.pdf] Error 127

paulmckrcu / perfbook Goto Github PK

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perfbook's Issues

[whymb] Missing writeback

how to compile Sample Source Code

Error 127 is not a good error message

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	\item CPU~0 receives the ``read'' message, and transmits the
	cache line containing the now-updated value of ``b''
	to CPU~1, also marking the line as ``shared'' in its own cache.
	\item CPU~1 receives the cache line containing ``b'' and installs
	it in its cache.

	\item CPU~0 receives the ``acknowledgement'' message, and puts
	the cache line containing ``b'' into the ``exclusive'' state.
	CPU~0 now stores the new value of ``b'' into the cache line.
	\item CPU~0 receives the ``read'' message, and transmits the
	cache line containing the new value of ``b''
	to CPU~1.
	It also marks its own copy of this cache line as ``shared''.