Skylake users - identify gcc options of your chips please [SOLVED]

graysky · 2016-08-29 18:54:44

I am trying to understand the scope of recent changes in gcc. If you have gcc installed on your Skylake-based Arch box (and it's up-to-date), please post a few things for me:

grep -m 1 -i 'model name' /proc/cpuinfo
gcc -c -Q -march=native --help=target | grep -i 'march=\|mtune='

Thank you!

Last edited by graysky (2016-08-30 20:11:28)

R00KIE · 2016-08-29 21:02:51

Here it goes:

> uname -a
Linux arch64 4.7.2-1-ARCH #1 SMP PREEMPT Sat Aug 20 23:02:56 CEST 2016 x86_64 GNU/Linux

> grep -m 1 -i 'model name' /proc/cpuinfo
model name	: Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz

> gcc -c -Q -march=native --help=target | grep -i 'march=\|mtune='
  -march=                     		skylake
  -mtune=                     		skylake

graysky · 2016-08-29 23:00:30

Thanks, R.

frank604 · 2016-08-30 02:25:17

~ master* 14s
❯ grep -m 1 -i 'model name' /proc/cpuinfo                                                  
model name	: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz

~ master*
❯ gcc -c -Q -march=native --help=target | grep -i 'march=\|mtune='                         
  -march=                     		skylake
  -mtune=                     		skylake

graysky · 2016-08-30 20:11:08

Thanks all. I got what I needed.

Arch Linux

#1 2016-08-29 18:54:44

Skylake users - identify gcc options of your chips please [SOLVED]

#2 2016-08-29 21:02:51

Re: Skylake users - identify gcc options of your chips please [SOLVED]

#3 2016-08-29 23:00:30

Re: Skylake users - identify gcc options of your chips please [SOLVED]

#4 2016-08-30 02:25:17

Re: Skylake users - identify gcc options of your chips please [SOLVED]

#5 2016-08-30 20:11:08

Re: Skylake users - identify gcc options of your chips please [SOLVED]

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