something wrong with compile.sh

[baiwfg2]

Hi. I see this article https://johnnysswlab.com/faster-hash-maps-binary-trees-etc-through-data-layout-modification/

and is eager to try the example. But I find that something wrong with https://github.com/ibogosavljevic/johnysswlab/blob/master/2023-09-datastucturelayout/compile.sh

clang++ -Werror -DLIKWID_PERFMON -O3 -std=c++17 -Werror -g array_of_pointers.cpp -I ../common/ -fopenmp works.

I wonder whether common/likwid.h can be used Or should I download likwid library by myself ?

[ibogosavljevic]

either sudo apt-get install liblikwid or use the replacement I provided if you don't have likwid or likwid doens't work for you.

[baiwfg2]

@ibogosavljevic Hi, I have another question. For many folders there is a compile.sh for us to build. Often build command is like this: g++/clang++ -g -O3 -DLIKWID_PERFMON -llikwid xxx.cpp

From this I infer that you build them using likwid installed within standard path(including headers and library) on your host instead of using common/likwid.h the repo provided, right ? I wonder how you run program in this situation, use likwid-perfctr or directly run ?

I've done likwid 5.3.0 building on my virtualized fedora environment, so I can build and run like this :

# clang++ -std=c++17 -g -mavx2 -fopenmp-simd -DLIKWID_PERFMON -llikwid sequential_test.cpp
root@2022-07-memproperties (master)# ./a.out
Running without Marker API. Activate Marker API with -m on commandline.

However nothing performance data is output, comparing to the scenario where I just use likwid.h the repo provided.

I don't know what's wrong. Any guidence ? I may want to see the similar performance data given by your customized likwid.h using standard likwid library, seems that the latter is more powerful.

[ibogosavljevic]

You need to run it through likwid-perfctr, e.g.

likwid-perfctr -g CLOCK - c 0 -m ./main

On Tue, Oct 1, 2024, 12:01 PM Lewis Chan @.***> wrote:

@ibogosavljevic https://github.com/ibogosavljevic Hi, I have another question. For many folders there is a compile.sh for us to build. Often build command is like this: g++/clang++ -g -O3 -DLIKWID_PERFMON -llikwid xxx.cpp

From this I infer that you build them using likwid installed within standard path(including headers and library) on your host instead of using common/likwid.h the repo provided, right ? I wonder how you run program in this situation, use likwid-perfctr or directly run ?

I've done likwid 5.3.0 building on my virtualized fedora environment, so I can build and run like this :

clang++ -std=c++17 -g -mavx2 -fopenmp-simd -DLIKWID_PERFMON -llikwid sequential_test.cpp

@.*** (master)# ./a.out Running without Marker API. Activate Marker API with -m on commandline.

However nothing performance data is output, comparing to the scenario where I just use likwid.h the repo provided.

I don't know what's wrong. Any guidence ? I may want to see the similar performance data given by your customized likwid.h using standard likwid library, seems that the latter is more powerful.

— Reply to this email directly, view it on GitHub https://github.com/ibogosavljevic/johnysswlab/issues/1#issuecomment-2385354585, or unsubscribe https://github.com/notifications/unsubscribe-auth/ACAJBLZP5ZFUFY5NRE6KVHTZZJXGDAVCNFSM6AAAAABPCUSBHSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDGOBVGM2TINJYGU . You are receiving this because you were mentioned.Message ID: @.***>

[baiwfg2]

Many thanks. It works for me, although it doesn't run the case of 32M, 64M or larger array size. Strange.