On 28 August 2012 21:00, Adrian Chadd <adr...@freebsd.org> wrote: > The default (most things as modules) kernel build is still ~ 3.5mb. > That's rather large for a board with 16MB of RAM. > > Additionally, I can't load the ath device after the system has come up > single user - the driver fails to allocate descriptors/buffer entries. > I'll do some digging about it in a couple of weeks. I'd like some > pointers on how to dump the current state of memory so I can see > exactly what's going on. > > For reference, 'sysctl vm.vmtotal' shows the total free RAM is around > 1 to 1.5MB. I'm guessing some are allocated to buffers but I'd like to > see what else is actually holding onto memory..
It turns out memory fragmentation due to a huge (for embedded) userland are to blame. I'll see if I can get ray@ to help me port phkmalloc to -HEAD again and try to tweak the default allocator parameters to not pre-allocate large pools for each process. Seeing login, sh, etc have an RSS of 1MB is kind of scary. I'll do some more digging with procstat (when I fit it into the current image) and report back. There's also the problem of a 3.5MB "stripped down nothing but what's needed to boot and read the rootfs from SPI flash + FFS" kernel size problem. That seems slightly(!) too big.. Adrian _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-wireless To unsubscribe, send any mail to "freebsd-wireless-unsubscr...@freebsd.org"