News for hackers. Stuff that matters.

A comment on Threadripper 3990X: The Quest To Compile 1B Lines Of C++ On 64 Cores. Parent comment

Re:Threadripper 3990X: The Quest To Compile 1B Lines Of C++ ... by flukus on Wednesday February 03, 2021 @08:41PM (#26021577)
Most compilers won't fsync will they? The output is likely not being written straight to disk.

It's caches all the way down.

[ Parent | on HN ]
Re:Threadripper 3990X: The Quest To Compile 1B Lines Of C++ ... by rbanffy on Thursday February 04, 2021 @04:39AM (#26024046)
And to max out disk bandwidth before you max out your CPU cores you need a really terrible disk.

I don't think many 8-way Xeon Platinum boxes have eMMC storage.

[ Parent | on HN ]
Re:Threadripper 3990X: The Quest To Compile 1B Lines Of C++ ... by MayeulC on Friday February 05, 2021 @02:11PM (#26040032)
Well, using ramdisks will let you compare and make sure the disk isn't the bottleneck, at least.
[ Parent | on HN ]
Re:Threadripper 3990X: The Quest To Compile 1B Lines Of C++ ... by corty on Thursday February 04, 2021 @04:19AM (#26023961)
But all compilers will close(). Compare compile times on tmpfs and you will see an improvement.
[ Parent | on HN ]