Fair enough.
MUSL:
-rw-r--r-- 1 adamk adamk 6700676 Aug 27 23:15 root.squashfs
UCLIBC:
-rw-r--r-- 1 adamk adamk 6601764 Aug 27 14:19 root.squashfs
So about 100KB difference.
Running Ubuntu 14.04.2 LTS x64 here.
I guess what I am looking at is the final product, which is around 300KB
bigger in size. Regardless, I'm going to need to reduce features for
routers with 8MB of flash, as kernel bloat also adds around another 300KB.
On 28/08/15 09:11, Felix Fietkau wrote:
On 2015-08-28 01:03, Adam Kuklycz wrote:
Just following up on the suspected memory leak, and image build sizes.
With the memory leak, it's not a memory leak as such rather than
conntrackd filling things up with a log file.
After 22 hours of running:
root@gateway-openwrt:/tmp/log# ls -l
-rw------- 1 root root 30080612 Aug 28 08:44
conntrackd-stats.log
drwxr-xr-x 2 root root 60 Aug 27 10:37 ddns
-rw-r--r-- 1 root root 0 Aug 25 13:06 lastlog
-rw-r--r-- 1 root root 0 Aug 27 10:36 log.nmbd
-rw-r--r-- 1 root root 0 Aug 27 10:36 log.smbd
-rw-r--r-- 1 root root 0 Aug 25 13:06 wtmp
Deleting the log file and then shutting down conntrackd cleared the used
space. I might look at omitting conntrackd from the builds in future.
Now for the build sizes.
musl does produce a larger image. Below is the result of a
configuration file I have used for trunk builds with releases 457xx and
have reused for a build on r46734 the only changes being I selected
either uclibc or musl for the toolchain, otherwise the config file used
is identical.
MUSL:
-rw-r--r-- 1 adamk adamk 8126468 Aug 27 23:15
openwrt-ar71xx-generic-wndr3800-squashfs-sysupgrade.bin
UCLIBC:
-rw-r--r-- 1 adamk adamk 7864324 Aug 27 14:19
openwrt-ar71xx-generic-wndr3800-squashfs-sysupgrade.bin
Now, for stability sakes I'll want to reduce the image size anyway, with
the bloat from latest kernels blowing things out by a good 300KB as
well, but it looks like using musl adds around 300KB too.
Have the devs determined that perhaps the increased performance of using
musl outweighs the hit on image sizes?
Images are padded, often to 256 KB (which is the size increase of your
image). This means that it might be that musl just slightly increases
the image size enough to push it to the next 256KB boundary.
Comparing the size of
build_dir/target-mips_34kc_musl-1.1.10/linux-ar71xx_generic/root.squashfs-raw
between uclibc and musl should be more accurate.
- Felix
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