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<kilobyte>
pmpp: finally got around to benchmark nbd vs aoe. Turns out there is a difference in speed after all. And a big one. In every test.
<kilobyte>
for example, "btrfs scrub" takes 5m48s (median of 5) on aoe vs 2m30s on nbd
<kilobyte>
raw linear block device speed: 103MB/s nbd vs 46MB/s aoe (exactly same read and write -- even spinning rust can more than saturate a GBe link)
<kilobyte>
client: Pine64 on 4.13-rc1, server: QNAP 253a (amd64) on 4.9, both Debian. Backing device is spinning rust.
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<kilobyte>
pmpp: it's that slow from an amd64 on the same network, too
<kilobyte>
in case I'm doing something wrong, theoretical comparison is: aoe: packet payload capped to 1024 bytes, overhead: ethernet 42 bytes + unknown aoe (at least 24-bit major:minor and some kind of sequence number); nbd: packets up to full MTU; overhead: ethernet 42 bytes + IPv6 40 bytes + TCP 20 bytes
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<diego71>
kilobyte: may be the TCP congestion control, help to use the right bandwidth
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<pmpp>
kilobyte: interesting results what were the nbd server software and aoe ( vblade or kvblade ) ?
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<MoeIcenowy>
qschulz: I found a problem when trying to add H3 support to sun4i-gpadc-iio
<MoeIcenowy>
For the first thermal reading
<MoeIcenowy>
the regmap_read operation is performed *before* runtime_resume is executed
<MoeIcenowy>
so it read out 0
<MoeIcenowy>
and for H3 the scale is negative, and 0 will mean a extremely high tempature (216 degree C)
<MoeIcenowy>
could you verify whether this problem exists on A33?
<MoeIcenowy>
(P.S. for thermal reading after booting the readout is normal)
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<MoeIcenowy>
(On H3 if trip points are added, the system will consider the chip is 216 degree when first read, as critical trip point is ~105 degree the system will emergency halt)
<MoeIcenowy>
(This problem may be hidden on A33 as on A33 0 will mean a very low temperature, and low temperatures won't trigger trip points, and when you run thermal reading once more after booting the new thermal reading will be okay
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<MoeIcenowy>
my temporary hack of this problem is let the sun4i_gpadc_temp_read function return -EINVAL when the raw val read out is 0 (seems very problematic)
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<kilobyte>
pmpp: official nbd-server, vblade; both with default settings
<kilobyte>
pmpp: looks like kvblade still hasn't been merged despite all the years, and it's not packaged in Debian either, so I have some doubts wrt trusting its stability
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<kilobyte>
(this probably goes too off-topic for -sunxi: discussing alternatives to local SD was okay, platform-independent issues with aoe not really. Let's continue on another channel?)
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<KotCzarny>
kilobyte: you can always come to #h3droid
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<lurchi_>
Have I overlooked something, or is the current A64 dtsi (up to "for-next" branch) missing the DT nodes for SPI0/1?
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<lurchi_>
H5 imports it from arm/sunxi-h3-h5.dtsi
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