Click here to Skip to main content
15,912,457 members
Home / Discussions / C / C++ / MFC
   

C / C++ / MFC

 
QuestionRe: How to resolve: error LNK2001: unresolved external symbol "public: static void * Pin
Richard MacCutchan13-Feb-19 21:43
mveRichard MacCutchan13-Feb-19 21:43 
AnswerRe: How to resolve: error LNK2001: unresolved external symbol "public: static void * Pin
Davie2124014-Feb-19 5:02
Davie2124014-Feb-19 5:02 
QuestionOverriding problem Pin
NoviceEx10-Feb-19 7:02
NoviceEx10-Feb-19 7:02 
AnswerRe: Overriding problem Pin
Richard Andrew x6410-Feb-19 12:34
professionalRichard Andrew x6410-Feb-19 12:34 
GeneralRe: Overriding problem Pin
NoviceEx10-Feb-19 19:47
NoviceEx10-Feb-19 19:47 
AnswerRe: Overriding problem Pin
CPallini10-Feb-19 21:07
mveCPallini10-Feb-19 21:07 
GeneralRe: Overriding problem Pin
Davie2124014-Feb-19 5:03
Davie2124014-Feb-19 5:03 
QuestionUsing OpenMP - #of CPU or # of threads ? Pin
Vaclav_8-Feb-19 10:19
Vaclav_8-Feb-19 10:19 
AnswerRe: Using OpenMP - #of CPU or # of threads ? Pin
leon de boer8-Feb-19 21:35
leon de boer8-Feb-19 21:35 
AnswerRe: Using OpenMP - #of CPU or # of threads ? Pin
Richard MacCutchan8-Feb-19 22:36
mveRichard MacCutchan8-Feb-19 22:36 
GeneralRe: Using OpenMP - #of CPU or # of threads ? Pin
Vaclav_9-Feb-19 4:14
Vaclav_9-Feb-19 4:14 
GeneralRe: Using OpenMP - #of CPU or # of threads ? Pin
Richard MacCutchan9-Feb-19 6:40
mveRichard MacCutchan9-Feb-19 6:40 
GeneralRe: Using OpenMP - #of CPU or # of threads ? Pin
Vaclav_9-Feb-19 7:17
Vaclav_9-Feb-19 7:17 
GeneralRe: Using OpenMP - #of CPU or # of threads ? Pin
k50549-Feb-19 8:20
mvek50549-Feb-19 8:20 
GeneralRe: Using OpenMP - #of CPU or # of threads ? Pin
k50549-Feb-19 8:38
mvek50549-Feb-19 8:38 
GeneralRe: Using OpenMP - #of CPU or # of threads ? Pin
Vaclav_9-Feb-19 13:11
Vaclav_9-Feb-19 13:11 
GeneralRe: Using OpenMP - #of CPU or # of threads ? Pin
leon de boer9-Feb-19 16:52
leon de boer9-Feb-19 16:52 
OpenMP works out how many CPU core you have at runtime.
It isn't a fixed answer and there may be cores unavailable to you and there isn't a thing you can do about it.

This call returns the number of cores available to you at time of call
int omp_get_num_procs();

Inside Windows or Linux certain threads may have a core locked with core affinity and you can sit there and whistle dixie the OS is never going to give OpenMP that core.

OpenMP is not the OS and is not in control of core scheduling it asks and locks the maximum the O/S will allow.

So if you aren't getting all the cores you need to look at the O/S level.
google something like "Affinity control outside OpenMP"
In vino veritas


modified 9-Feb-19 22:59pm.

GeneralRe: Using OpenMP - #of CPU or # of threads ? Pin
Vaclav_10-Feb-19 4:34
Vaclav_10-Feb-19 4:34 
GeneralRe: Using OpenMP - #of CPU or # of threads ? Pin
Richard MacCutchan10-Feb-19 6:42
mveRichard MacCutchan10-Feb-19 6:42 
GeneralRe: Using OpenMP - #of CPU or # of threads ? Pin
Richard MacCutchan9-Feb-19 22:42
mveRichard MacCutchan9-Feb-19 22:42 
QuestionC coding to evaluate an arithmetic expression Pin
Member 119317847-Feb-19 12:08
Member 119317847-Feb-19 12:08 
AnswerRe: C coding to evaluate an arithmetic expression Pin
jeron17-Feb-19 14:16
jeron17-Feb-19 14:16 
AnswerRe: C coding to evaluate an arithmetic expression Pin
leon de boer7-Feb-19 17:52
leon de boer7-Feb-19 17:52 
AnswerRe: C coding to evaluate an arithmetic expression Pin
CPallini7-Feb-19 23:21
mveCPallini7-Feb-19 23:21 
RantWhy "make"? Pin
Vaclav_7-Feb-19 5:28
Vaclav_7-Feb-19 5:28 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.