[PATCH 04/40] lib: Convert str_to_list() to use alist
Tom Rini
trini at konsulko.com
Mon Jul 29 20:16:51 CEST 2024
On Mon, Jul 29, 2024 at 09:28:57AM -0600, Simon Glass wrote:
> Hi Sughosh,
>
> On Sun, 28 Jul 2024 at 12:07, Sughosh Ganu <sughosh.ganu at linaro.org> wrote:
> >
> > On Thu, 25 Jul 2024 at 18:24, Sughosh Ganu <sughosh.ganu at linaro.org> wrote:
> > >
> > > On Thu, 25 Jul 2024 at 02:24, Tom Rini <trini at konsulko.com> wrote:
> > > >
> > > > On Wed, Jul 24, 2024 at 11:31:48AM +0530, Sughosh Ganu wrote:
> > > >
> > > > > From: Simon Glass <sjg at chromium.org>
> > > > >
> > > > > Use this new data structure in the utility function.
> > > > >
> > > > > Signed-off-by: Simon Glass <sjg at chromium.org>
> > > > > Signed-off-by: Sughosh Ganu <sughosh.ganu at linaro.org>
> > > > > ---
> > > > > lib/strto.c | 35 +++++++++++++++++++----------------
> > > > > 1 file changed, 19 insertions(+), 16 deletions(-)
> > > >
> > > > This is rather big growth when we didn't already have realloc:
> > > > 05: lib: Convert str_to_list() to use alist
> > > > aarch64: (for 1/1 boards) all +1765.0 rodata +37.0 text +1728.0
> > > > xilinx_versal_mini_emmc0: all +1765 rodata +37 text +1728
> > > > u-boot: add: 7/0, grow: 1/0 bytes: 1728/0 (1728)
> > > > function old new delta
> > > > realloc - 1120 +1120
> > > > alist_ensure_ptr - 140 +140
> > > > alist_expand_to - 136 +136
> > > > alist_init - 108 +108
> > > > alist_uninit_move_ptr - 76 +76
> > > > alist_add_ptr - 72 +72
> > > > alist_uninit - 48 +48
> > > > str_to_list 204 232 +28
> > > >
> > >
> > > I am working on an implementation of lmb maps using lists. The list
> > > nodes are then allocated with calloc, which I believe is included in
> > > most of the board images. We can then compare the size impact with the
> > > two implementations (alist vs list). Thanks.
> >
> > I have worked on implementing the LMB maps using simple lists, and we
> > do get a good size benefit with the list based implementation. I have
> > used the script that was shared by Tom some time back to get the size
> > impact [1]. The readings are with 1) alists with realloc 2) alist with
> > malloc and 3) using linked list. These are on a RPI4 build, which has
> > LMB enabled. I have checked the impact on a xilinx_versal_mini config
> > as well, which does not have LMB enabled, and the size impact result
> > is best with lists. The list based changes can be checked on my github
> > [2].
>
> Thanks for doing that. It is quite hard to read with the LTO enabled.
I don't think LTO is enabled there?
--
Tom
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 659 bytes
Desc: not available
URL: <https://lists.denx.de/pipermail/u-boot/attachments/20240729/d37944da/attachment.sig>
More information about the U-Boot
mailing list