topic Re: the difference between the source function and function in Analyzers

the difference between the source function and function

去你的 — Mon, 15 Apr 2024 00:06:49 GMT

Hi.

I am trying using vtune to analysis the my code. When I use the microarchitecture analysis. It shows my code is terrible.

Then I go to the bottom-up windows. Trying to see the which function causes this problem. When I choose Function/stack in group:

It shows my four function run very well.(My four functions is update_slack ....)

But when I choose source / function / Call stack in group

It shows that:

It seems that these functions cause my problem. But actually I even not use this function in my code!!.

I have two problem:
1, What is the difference between the source function and function.

2, I never use this function. How these functions appears in my profilers?

Best,

lzxdjb

Re: the difference between the source function and function

yuzhang3_intel — Tue, 16 Apr 2024 02:33:16 GMT

Eigen is a C++ template library for linear algebra, if your functions call these library functions? By default, the child processes will be analyzed by the VTune, if the functions are called by the processes? From the VTune result, the bottlenecks should be located in the library.

Hotspots analysis type with call stack can tell you the callers of the library functions.

Re: the difference between the source function and function

去你的 — Tue, 16 Apr 2024 02:37:20 GMT

I never call Eigen::internal::function;

In fact, These kind of functions even never appears in the Eigen library!

Re: the difference between the source function and function

yuzhang3_intel — Tue, 16 Apr 2024 03:18:28 GMT

It is interesting. Did you launch one application or profile system? Please post your command line.

Re: the difference between the source function and function

去你的 — Tue, 16 Apr 2024 03:22:45 GMT

I actually run a binary file in the VTune-gui. I do not run any command line. I think I just launch one application, put the binary file into it, and I run microarchitecture analysis.

Re: the difference between the source function and function

yuzhang3_intel — Tue, 16 Apr 2024 03:32:32 GMT

Please share the binary if possible. I can try it locally.

Re: the difference between the source function and function

去你的 — Tue, 16 Apr 2024 03:40:37 GMT

This is the binary's zip.

Re: the difference between the source function and function

去你的 — Tue, 16 Apr 2024 03:47:19 GMT

MY code actually use four function: update_slack update_primal update_dual update_linear_cost. I think this four functions should be the top of time. But actually I even could not find them since they cost so short time compare to those Eigen::internal .... , that even not appear in Eigen library!

Re: the difference between the source function and function

yuzhang3_intel — Tue, 16 Apr 2024 05:48:56 GMT

It looks like the binary is based on Mac OS? I can't run it on Windows and Ubuntu. Actually, VTune doesn't support Mac OS anymore.

Re: the difference between the source function and function

去你的 — Tue, 16 Apr 2024 15:23:35 GMT

I run it in ubuntu. I guess because binary can only run in local machine.

here is the source code:

you can first :

mkdir build

cd build

cmake ..

make

and the binary file is in the ../build/examples/original_tine_profile.

Re: the difference between the source function and function

yuzhang3_intel — Wed, 17 Apr 2024 02:33:17 GMT

Failed to build.

yuzhang3@yuzhang3-10710:~/workspace/isvc_jira_ips/TinyMPC/build$ make
[ 16%] Building CXX object src/tinympc/CMakeFiles/tinympc.dir/admm.cpp.o
In file included from /home/yuzhang3/workspace/isvc_jira_ips/TinyMPC/include/Eigen/Eigen.h:61,
from /home/yuzhang3/workspace/isvc_jira_ips/TinyMPC/src/tinympc/types.hpp:3,
from /home/yuzhang3/workspace/isvc_jira_ips/TinyMPC/src/tinympc/admm.hpp:3,
from /home/yuzhang3/workspace/isvc_jira_ips/TinyMPC/src/tinympc/admm.cpp:4:
/home/yuzhang3/workspace/isvc_jira_ips/TinyMPC/include/Eigen/Eigen/Core:39:52: error: missing binary operator before token "("
39 | #if EIGEN_COMP_MINGW && EIGEN_GNUC_STRICT_LESS_THAN(6,0,0)
| ^
/home/yuzhang3/workspace/isvc_jira_ips/TinyMPC/include/Eigen/Eigen/Core:185:10: fatal error: src/Core/arch/Default/ConjHelper.h: No such file or directory
185 | #include "src/Core/arch/Default/ConjHelper.h"
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [src/tinympc/CMakeFiles/tinympc.dir/build.make:76: src/tinympc/CMakeFiles/tinympc.dir/admm.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:118: src/tinympc/CMakeFiles/tinympc.dir/all] Error 2
make: *** [Makefile:91: all] Error 2

Re: the difference between the source function and function

去你的 — Wed, 17 Apr 2024 03:51:44 GMT

It is very strange though.

Try this one?

Re: the difference between the source function and function

yuzhang3_intel — Wed, 17 Apr 2024 07:59:28 GMT

Built success. I captured one hotspot as attached. You can see the call stack information about Eigen.