| View previous topic :: View next topic |
| Author |
Message |
cowboy0629
Tux's lil' helper
Joined: 11 May 2016
Posts: 105
Location: Kawartha Lakes, Ontario
|
 Posted: Sun Mar 01, 2020 3:13 am Post subject: Cflags help |
 |
|
Hi all I am working on getting distcc working on a few of my systems
I have ran into something I have never worried about before for instance my CFLAGS in my make.conf
my question is how do I figure out what my cpu is ie (sandybridge, ivybridge) and what do I set the CFLAGS too when I can't use the native flag with distcc
The First Computer is a Dell CORE i5 vPRO
| Code: | $ lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
Address sizes: 36 bits physical, 48 bits virtual
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 2
Core(s) per socket: 2
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 58
Model name: Intel(R) Core(TM) i5-3320M CPU @ 2.60GHz
Stepping: 9
CPU MHz: 1239.818
CPU max MHz: 3300.0000
CPU min MHz: 1200.0000
BogoMIPS: 5182.69
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 3072K
NUMA node0 CPU(s): 0-3
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht
tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm cpuid_fault epb pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms xsaveopt dtherm ida arat pln
pts flush_l1d
|
thanks in advance
Mike |
|
| Back to top |
|
 |
Goverp
Advocate
Joined: 07 Mar 2007
Posts: 2014
|
| Posted: Sun Mar 01, 2020 10:06 am Post subject: |
|
|
Run
| Code: | | gcc =march=native -Q --help=target |
on your target machine.
_________________
Greybeard |
|
| Back to top |
|
|
cowboy0629
Tux's lil' helper
Joined: 11 May 2016
Posts: 105
Location: Kawartha Lakes, Ontario
|
| Posted: Sun Mar 01, 2020 5:58 pm Post subject: |
|
|
Goverp
Hi Im on a complete stand still at the moment does not seem that they are talking to each other when I try to emerge something..
the server is a 2x XEON 8 Core machine
but when I run distccmon-gui or distccmon-text n10 nothing appears in either program
next what file do I put this in
| Code: | | gcc =march=native -Q --help=target |
thanks
Mike |
|
| Back to top |
|
|
ali3nx
l33t
Joined: 21 Sep 2003
Posts: 722
Location: Winnipeg, Canada
|
| Posted: Sun Mar 01, 2020 6:31 pm Post subject: |
|
|
| cowboy0629 wrote: |
next what file do I put this in
| Code: | | gcc =march=native -Q --help=target |
thanks
Mike |
If you type that command in bash shell it will print the results revealing the recommended cpu clfags for you to review. Personally i prefer this one but either command will accomplish the desired results.
https://wiki.gentoo.org/wiki/GCC_optimization#-march
| Code: | | gcc -### -march=native /usr/include/stdlib.h |
| cowboy0629 wrote: | | but when I run distccmon-gui or distccmon-text n10 nothing appears in either program |
if your using systemd the services configuration file for distccd is located in an enitrely different file than when distccd is used with openrc.
| Code: | | /etc/systemd/system/distccd.service.d/00gentoo.conf |
distccd will also spam system logs so if using distccd with systemd or openrc you can tail the system logfiles or journal using systemd journalctl to view the distcc log entries.
_________________
Compiling Gentoo since version 1.4
Thousands of Gentoo Installs Completed
Emerged on every continent but Antarctica
Compile long and Prosper! |
|
| Back to top |
|
|
Goverp
Advocate
Joined: 07 Mar 2007
Posts: 2014
|
| Posted: Mon Mar 02, 2020 8:09 am Post subject: |
|
|
More to the point, it prints out the value of "-march" that gcc thinks is right for the CPU running the command.
_________________
Greybeard |
|
| Back to top |
|
|
NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54317
Location: 56N 3W
|
| Posted: Mon Mar 02, 2020 8:19 am Post subject: |
|
|
cowboy0629,
I'm a bit late to this party but I like this Stack Overflow topic.
Here, I get | Code: | $ gcc -### -E - -march=native 2>&1 | sed -r '/cc1/!d;s/(")|(^.* - )|( -mno-[^\ ]+)//g'
-march=amdfam10 -mmmx -m3dnow -msse -msse2 -msse3 -msse4a -mcx16 -msahf -mpopcnt -mabm -mlzcnt -mprfchw -mfxsr --param l1-cache-size=64 --param l1-cache-line-size=64 --param l2-cache-size=512 -mtune=amdfam10 |
So dumping the output of that command into CFLAGS is right for me.
Take care when posting your emerge --info to explain where it came from.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
|
| Back to top |
|
|
|
Other Things Gentoo
