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<GitHub-m-labs>
[artiq] sbourdeauducq commented on pull request #1115 61d1a5c: Should the frequent use case be ``channel.count(channel.gate_rising(10*us))`` or ``channel.gate_rising(10*us); channel.count()``?... https://github.com/m-labs/artiq/pull/1115#discussion_r207083628
<kaolpr>
what is the easiest way to access CSR from ARTIQ experiment?
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<rjo>
sb0: that connection reset was with a known-goot gs110tp (the same things that i have been using). when icleaned up the vlan setup there it disappeared. i think some packets went wrong and the keepalive killed it. not really sure though how much to attribute to smoltcp since everything else was working fine.
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<rjo>
sb0: do we have an issue for that thing occuring with shaky wifi?
<sb0>
rjo, no; not sure if that's the device's fault...
<sb0>
there is generally a non-negligible packet loss rate on that wifi
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<rjo>
sb0: christian had the artiq network on a vlan and the rest on another. on the link between his pc and the switch he was running the artiq vlan tagged and the other network untagged. i changed it to both tagged and the problem disappeared. but that should definitely not affect tcp keepalive on the artiq connection.
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<sb0>
could be different problems too...
<rjo>
i'll post the packet dump when i get it.
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<rjo>
other than that grabber looks good. two things: i am pretty sure the pixel duplication is a way to comply with the cl spec. the adc is running at 30 MHz (in that case) and the min cl freq is ~40 MHz. so they just send each pixel twice to double the frequency. checked that the lines get correspondingly longer if i reduce the adc freq.
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<rjo>
i.e. three times the pixels on 20 MHz etc
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<rjo>
christian asked for a way to get notified when the resolution changes. i wouldn't add that to the rtio interface because it'll become difficult to use. the easiest, least intrusive and most useful way seems to just log resolution changes in the grabber runtime task.
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<GitHub-m-labs>
[artiq] jordens commented on pull request #1115 61d1a5c: I'm ok with dropping the default for `up_to_timestamp`. That would also prevent a few more cases of the original problem of silently assuming that the count end time can be handled automatically (in DMA or with multiple gates). https://github.com/m-labs/artiq/pull/1115#discussion_r207170911
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<GitHub-m-labs>
[artiq] cjbe opened pull request #1122: share moninj injection state between dashboards (master...moninj_injection) https://github.com/m-labs/artiq/pull/1122
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<GitHub-m-labs>
[artiq] sbourdeauducq commented on issue #1122: > With the current implementation the modifying client receives a notification of its change up to 200ms after the change, which means that the dashboard moninj panel cannot be used to generate events faster than 200ms.... https://github.com/m-labs/artiq/pull/1122#issuecomment-409889363
<cjbe>
sb0, rjo: FWIW we also see connection resets on our Kaslis at a rate of ~1/day per Kasli when running experiments on a wired network through a couple of switches - have not managed to get a packet dump yet
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<GitHub-m-labs>
[artiq] cjbe commented on pull request #1122 cd9f832: OK - permuting the packet numbering would allow new firmware with the old dashboard. New dashboard and old firmware would always break things though (firmware aborts connection on unknown packet type). https://github.com/m-labs/artiq/pull/1122#discussion_r207188129
<GitHub-m-labs>
[artiq] klickverbot closed pull request #1112: test_rtio: Add loopback test using DMA (master...dma-loopback-test) https://github.com/m-labs/artiq/pull/1112
<cjbe>
rjo: the Kasli and master are on the same VLAN - the configuration of this is out of my control, but I don't think it is doing anything exceptional
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<rjo>
cjbe: there is no vlan tagging on the linux machine going on?
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<uberardy>
hey, maybe a bit off-topic, we're using migen in an open source project and I happen to be in Hong Kong at the moment, so I was wondering wheter I could stop by the office some time just to say hi?
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