[PATCH v3] gprof: only process line numbers for intersection of vmas and histograms

[H.J. Lu]

On Sat, Mar 8, 2025 at 7:17 PM Richard Allen <rsaxvc@gmail.com> wrote:
>
> > Here is the patch to delay loading the symbol table until its first use.
> > Does it work for you?
>
> I changed core_create_line_syms() to call get_symtab_direct()
> to fix runaway recursion and stack overflow.

Fixed it and core_create_syms_from.

> I ran gprof with small gmon file against the Linux kernel debug symbols:
>
> Before: 55 minutes.
> After: ~8 seconds.
>
> Also, I'm not sure if it is enough for core_create_line_syms() to check
> only the histograms for symbols. Do you think we'll also need to lookup
> symbols for basic-block and call-graph addresses?

How can we get these symbols?

>

Here is the v3 patch.


--
H.J.
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