<naobsd>
anyway it's special configuration, not standard mainline
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<naobsd>
mmm, there are issues to run "bitbake core-image-minimal" on linux/arm...
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<rperier>
naobsd: which kind of issues ?
<rperier>
naobsd: if you use meta-rockchip, you might have to customize your kernel config to your needs (bitbake -c menuconfig virtual/kernel)
<naobsd>
rperier: I think I need to set TARGET_* properly
<naobsd>
at least "armv7l" is not recognized :(
<naobsd>
return to home...
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<rperier>
you need to use a "machine" for that...
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<rperier>
naobsd: what do you try to do ? you have a build/conf/local.conf, and you need to use a "machine" defined in your meta-bsp layer. This file defines the ARM CPU target throught an include file, provided by poky and defined the right cflags , abi and optimizations to use
<rperier>
s/defined the right/define the right/
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<naobsd>
I just tried "bitbake core-image-minimal" on ubuntu 14.04 armhf
<naobsd>
this is my first OE/Yocto trial, I know almost nothing...
<naobsd>
host uname returns armv7l which is probably not handled properly
<naobsd>
is Simon Glass here?
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<rperier>
mhhh... this emac bug is really... really... strange... we only loose packet at the beginning of the connection, only when trying to connect to an nfs server, or trying to get an zImage throught tftp for the first time... once booted on my rootfs throught NFS, I can use ssh with dropbear, iperf or tftp and exchange a ton of data without any issues... :/
<rperier>
the only useful information I found is that I get a TX BD tagged with "UFLO" sometimes (from arc_emac_tx_clean) which means: "Underflow erRr, packet data corrupted and
<rperier>
dropped because data was not available in time. Larger FIFOs, more AHB bus bandwidth or lower system latency required." => Change ring buffer size, does not solve the issue, changing the emac pollrate does not solve the issue too... and I don't think that it has to do with AHB bus bandwith... perhaps...
<rperier>
:D
<rperier>
I am patching the driver to add more support for ethtool and I will change parameters...
<rperier>
the boring stuff being that I cannot use tools like ftrace (which might give me informations about latency or about some events , including irq...) because most of my issues are at boot time when the kernel tries to mount the rootfs throught the network :D
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<rperier>
that's a funny task :D
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<gb_master>
rperier: is the packet loss linked somehow with skb_panic?
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<rperier>
gb_master: it seems to be a separated issue. BUT ! skb_panic seems to be related to the ring buffer size and the "budget" passed to the poll function , so it should be easily fixable I think. The big deal is these packets loss
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<gb_master>
rperier: were you able to easily reproduce the panic?
<rperier>
easily not, but able to reproduce the panic yes
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