On Mon, Oct 14, 2024 at 11:31:42AM +0100, Alan Maguire wrote:
> This reduces peak memory utilization during BTF vmlinux encoding,
> replacing ELF section-sized malloc()s with mmap()s.
>
> For -j1 peak memory resident set size drops from
>
> Maximum resident set size (kbytes): 1069220
>
> ...to:
>
> Maximum resident set size (kbytes): 701888
>
> ...with this patch.
>
> For -j8, peak memory resident set size drops from
>
> Maximum resident set size (kbytes): 1121172
>
> ...to:
>
> Maximum resident set size (kbytes): 963516
Thanks, applied to perf-tools-next,
- Arnaldo
> Signed-off-by: Alan Maguire <alan.maguire@xxxxxxxxxx>
> ---
> btf_encoder.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/btf_encoder.c b/btf_encoder.c
> index 5954238..9599faf 100644
> --- a/btf_encoder.c
> +++ b/btf_encoder.c
> @@ -1879,7 +1879,7 @@ static int btf_encoder__tag_kfuncs(struct btf_encoder *encoder)
> goto out;
> }
>
> - elf = elf_begin(fd, ELF_C_READ, NULL);
> + elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
> if (elf == NULL) {
> elf_error("Cannot update ELF file");
> goto out;
> --
> 2.43.5
