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hardware counter information for individual functions via commandline

Prasanna_B_
Beginner
186 Views

Dear Vtune experts,

I am trying to gather hardware counter information for individual functions in a code. While this seems straightforward in GUI, I haven't found a way through command line interface.

In the command line, I tried two reports:
(1)  amplxe-cl -R summary -r r012ge

This gives me hardware counter information (instruction count, cache hit rate) for the entire code, but not for specific functions, which is what I need.

(2) amplxe-cl -R hotspots -r r012ge

This gives me timing information for individual functions, but no hardware counter information.

Thanks

 

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1 Solution
Peter_W_Intel
Employee
186 Views

> In the command line, I tried two reports:

> (1)  amplxe-cl -R summary -r r012ge

> This gives me hardware counter information (instruction count, cache hit rate) for the entire code, but not for specific functions, which is what I need.

Peter: using option "summary" indicates that you want to see overall events counters of general-exploration, no specific data on functiuon

> (2) amplxe-cl -R hotspots -r r012ge

> This gives me timing information for individual functions, but no hardware counter information.

Peter: if you want to see event counters instead of timing info on functions, please use - “amplxe-cl -R hw-events -r r012ge" for displaying event counters on functions.

 

 

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9 Replies
Bernard
Black Belt
186 Views

I also wanted to ask the same question.

David_A_Intel1
Employee
186 Views

Hi Prasanna:

Good question!  Please see the "group-by" option in the help information.  For example:

amplxe-cl -R hotspots -r r012ge -group-by=function

 

Peter_W_Intel
Employee
187 Views

> In the command line, I tried two reports:

> (1)  amplxe-cl -R summary -r r012ge

> This gives me hardware counter information (instruction count, cache hit rate) for the entire code, but not for specific functions, which is what I need.

Peter: using option "summary" indicates that you want to see overall events counters of general-exploration, no specific data on functiuon

> (2) amplxe-cl -R hotspots -r r012ge

> This gives me timing information for individual functions, but no hardware counter information.

Peter: if you want to see event counters instead of timing info on functions, please use - “amplxe-cl -R hw-events -r r012ge" for displaying event counters on functions.

 

 

Bernard
Black Belt
186 Views

Link to VTune command line inteface support.

http://software.intel.com/en-us/node/496639

David_A_Intel1
Employee
186 Views

Sorry. :(  Looks like I answered the wrong question.

1024chickens
Beginner
186 Views

Thanks for the advice, Peter. I tried "amplxe-cl -R hw-events -r r012ge", which displayed the event counters for modules, instead of functions, as shown below. What the Function column shows are not really functions in my application code, but module names. Any ideas?

Thanks.

Yao

Function                            Module                            
----------------------------------  --------------------------------  -------------
[vmlinux]                           vmlinux                                
[sep3_10]                           sep3_10                                  
[libc-2.14.90.so]                   libc-2.14.90.so                          
[micscif]                           micscif                                 
[coi_daemon]                        coi_daemon                                
[libabstract_mic_card.so]           libabstract_mic_card.so                   
[libscif.so.0.0.1]                  libscif.so.0.0.1                         
[dma_module]                        dma_module                              
[ld-2.14.90.so]                     ld-2.14.90.so                           
[ringbuffer]                        ringbuffer                               
[ibp_cm_client]                     ibp_cm_client                         
[ibscif]                            ibscif                                    
[libamplxe_sampling_utils_3.10.so]  libamplxe_sampling_utils_3.10.so          
[libmessage_mic.so]                 libmessage_mic.so                       

 

Peter_W_Intel
Employee
186 Views

> What the Function column shows are not really functions in my application code, but module names

The reason was that hot samples can not be relocated on functions which are in Linux kernel modules, due to lack of debug info. See this article.

1024chickens
Beginner
186 Views

Hi Peter,

The functions I'm interested in are the ones in my application code, not the ones in vmlinux or libc. Would the solution in that article allow me to see information for the functions in my application code?

Thanks,

Yao

Peter_W_Intel
Employee
186 Views

Absolutely "Yes", however it cannot see your functions (even your module name) displayed in top list, maybe your application consumed CPU low?

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