Message 349555 - Python tracker

➜

This issue tracker has been migrated to GitHub, and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

Author	vstinner
Recipients	Mark.Shannon, jdemeyer, josh.r, malin, methane, vstinner
Date	2019-08-13.13:40:18
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<[email protected]>
In-reply-to

Content
Another example to explain my concern. In the Linux kernel, list macros used to prefetch next items: “(...) So the conclusion is: prefetches are absolutely toxic, even if the NULL ones are excluded.” https://lwn.net/Articles/444336/ The lesson is that we should not let developers tune the compiler: let the CPU do that for you :-) For example, CPUs have evolved heuristics to prefetch data for you.

Another example to explain my concern. In the Linux kernel, list macros used to prefetch next items: “(...) So the conclusion is: prefetches are absolutely toxic, even if the NULL ones are excluded.”

https://lwn.net/Articles/444336/

The lesson is that we should not let developers tune the compiler: let the CPU do that for you :-) For example, CPUs have evolved heuristics to prefetch data for you.

History
Date	User	Action	Args
2019-08-13 13:40:18	vstinner	set	recipients: + vstinner, methane, Mark.Shannon, jdemeyer, josh.r, malin
2019-08-13 13:40:18	vstinner	set	messageid: <[email protected]>
2019-08-13 13:40:18	vstinner	link	issue37774 messages
2019-08-13 13:40:18	vstinner	create