Experimental Physics and
Industrial Control System

"Gofron, Kazimierz" <[email protected]> · Tue, 13 Feb 2018 00:42:19 +0000

Hi Mark,
Indeed it is make 4.1 from EPICS web page, that Andrew build.
Kaz
________________________________________
From: Mark Rivers [[email protected]]
Sent: Monday, February 12, 2018 7:36 PM
To: Gofron, Kazimierz; [email protected]
Cc: [email protected]
Subject: RE: Possible issue with epics-base 7 compilation

Hi Kaz,

I don’t think this is a new problem, and is not specific to EPICS 7.  Are you using the make 4.1 that Andrew built and put on the EPICS Web page?

If I run “make –sj” with that version then it will occasionally get into a state when one “make” process is using 100% of a core forever and it never completes.  This happens with 3.14.12.5, 3.15.5, and 7.0.1.1.

I have never had a problem if I use “make –sj8” on my 8-core machine.

Mark

From: Gofron, Kazimierz [mailto:[email protected]]
Sent: Monday, February 12, 2018 6:23 PM
To: [email protected]
Cc: Mark Rivers <[email protected]>; [email protected]
Subject: Possible issue with epics-base 7 compilation

Hi,

There is a possible threading issue when compiling epics-base 7 using 'make -sj'  on 8 hyperthread system.
Observed on System X 3250 M5 with 8 hyperthreads, running windows 7 Professional, Xeon E3-1230 v3, and Visual Studio 2017.

make -sj never completes compilation
make -sj4 completes compilation

Compilation always successfully completes on Lenovo W550s laptop with 4 hyperthreads.

The two attached files show the two cases when compiling 'make' and 'make -sj' on the System X 3250 M5 (8 hyperthreads).

Kaz

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System