Ruud H.G. van Tol on Sun, 03 Dec 2023 16:05:57 +0100

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Re: PARI/GP pthread questions

On 2023-12-03 15:31, Bill Allombert wrote:
On Sun, Dec 03, 2023 at 03:09:49PM +0100, Karim Belabas wrote:
For systems with hyper-threading, one can get the number of physical cores
as follows on my laptop:

# grep '^cpu cores' /proc/cpuinfo | uniq
cpu cores	: 4
This is only work if you have a single CPU!

$ grep '^physical id[^:]*:' /proc/cpuinfo |sort |uniq |wc -l

$ grep '^core id[^:]*:' /proc/cpuinfo |sort |uniq |wc -l

$ grep '^processor[^:]*:' /proc/cpuinfo |wc -l

$ grep '^cpu cores[^:]*:' /proc/cpuinfo |sort |uniq -c
     32 cpu cores       : 8

-- Ruud