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best memory profiler (to debug accumulated allocation of each line) for D?
Oct 14, 2022
mw
Oct 14, 2022
rassoc
Oct 15, 2022
mw
October 14, 2022
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mw
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Hi,

With CPU profiler, we can see the accumulated run time of each function & line, I'm wondering if there is such a profiler for memory allocation?

The reason I'm asking is because I suspect there are some small but repetitive memory allocation going on in the libraries (in C and D) I'm using which I do not have control (and no source available), but I want to find out where.

I want to run on some test data, and get the memory allocation stats for each function (better for each line of code), so I can find out where the problem is.

Any suggestions?

Thanks.

October 14, 2022
Gravatar of rassocPosted by rassoc
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On 10/14/22 20:45, mw via Digitalmars-d-learn wrote:
> Any suggestions?

There's `dmd -profile=gc` or `dub build --build=profile-gc`.
October 15, 2022
Gravatar of mwPosted by mw
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On Friday, 14 October 2022 at 19:06:12 UTC, rassoc wrote:
> On 10/14/22 20:45, mw via Digitalmars-d-learn wrote:
>> Any suggestions?
>
> There's `dmd -profile=gc` or `dub build --build=profile-gc`.

Thanks. I eventually use valgrind --tool=massif, and found the problem was in a underlying C library doing lots of small allocations.