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runtime: NumCPU returns 0 on Solaris (gccgo) #6109

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calmh opened this issue Aug 11, 2013 · 6 comments
Closed

runtime: NumCPU returns 0 on Solaris (gccgo) #6109

calmh opened this issue Aug 11, 2013 · 6 comments
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@calmh
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calmh commented Aug 11, 2013 

What steps will reproduce the problem?

Getting the value of runtime.NumCPU().

http://play.golang.org/p/cuaf2ZHLIx

What is the expected output?

The number of processor cores installed in the machine, including hyperthreading if
enabled (eight, in my specific case).

What do you see instead?

Zero.

Which compiler are you using (5g, 6g, 8g, gccgo)?

Gccgo.

Which operating system are you using?

SunOS zlogin2.nym.se 5.11 joyent_20130808T195337Z i86pc i386 i86pc Solaris

(i.e. latest Illumos)

Which version are you using?  (run 'go version')

Gccgo in gcc 4.7.2.
@robpike
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robpike commented Aug 12, 2013

Comment 1:

Labels changed: added priority-later, gccgo, removed priority-triage, go1.2maybe.

Status changed to Accepted.

@rsc
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rsc commented Nov 27, 2013

Comment 3:

Labels changed: added go1.3maybe.

@ianlancetaylor
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Comment 4:

Gccgo will not be part of the Go 1.3 release.

Labels changed: removed go1.3maybe.

@rsc
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rsc commented Dec 4, 2013

Comment 5:

Labels changed: added repo-gccgo.

@minux
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minux commented Dec 4, 2013

Comment 6:

this should have been fixed in 4.8 and later.
gccgo 4.7 series doesn't contain code to query the number of processors on Solaris.
could you please try a newer version of gccgo?
(if not, at least you can review the code for solaris,
http://gcc.gnu.org/git/?p=gcc.git;a=blob;f=libgo/runtime/getncpu-solaris.c;h=5d5d7025dfe430fe987186fbcd4f0fd3f18f17ad;hb=HEAD)

Status changed to WaitingForReply.

@ianlancetaylor
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No reply, so closing.

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@rsc @calmh @minux @ianlancetaylor @robpike @gopherbot