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<tzimmermann>
jfalempe, hi! a question on https://patchwork.freedesktop.org/series/131977/ on connector polling. the issue with the idrac likely comes from the final patch, which enables the polling. i'd like to send the first 9 patches as new patchset for DDC refactoring. as we discussed, polling requires bmc support. that would be a separate patch. but i think about modelling the bmc as a bridge instead of a connector. the bmc
<tzimmermann>
connector depends on the real connector, while a bridge would sit within the regular encoder-to-connector chain. thoughts?
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<jfalempe>
tzimmermann: sure you can re-send the first 9 patches, that shouldn't break the bmc use case.
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<tzimmermann>
great.
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<jfalempe>
for bridge vs connector, tbh I'm not sure what are the differences. I would still prefer something similar with AST.
<tzimmermann>
jfalempe, do you have thoughts on the brigde issue? the bmc connector's problem is that it depends on the hardware connector. for example, the DRM helpers have to do ->detect_ctx the hardware first, otherwise the bmc might return incorrect values. but there's no such guarantee in the helpers. it works because the hardware connector comes first in the list.
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<tzimmermann>
with a bridge, we always test the hardware conenctor first. if it's disconnected, we'd refer to the bmc bridge
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<jfalempe>
tzimmermann: if you think it will work better with a bridge, let's try it. We just need a way to configure the output even if the vga connector is disconnected.
<jfalempe>
tzimmermann: what will be the difference for userspace ? it will see only 1 connector, but if vga is disconnected, it will still report as "connected", but with "fake bmc" value ?
<tzimmermann>
yes, it's never diconnected
<tzimmermann>
but the reported modes might change
<karolherbst>
does anybody know what games/applications heavily rely on glMultiDraw* being low CPU overhead?
<jfalempe>
tzimmermann: ok, so it avoid the "bmc is connected only if vga is disconnected" trick, so that's good for me.
<jfalempe>
and it will also be easier for userspace, since it won't think it can display different thing on different connectors.
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<tzimmermann>
jfalempe, i have to experiment first
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<jfalempe>
tzimmermann: the mgag200 ioburst workaround works for some servers, but I have report that poweredge XR11 and XR5610 needs to completely disable Write Combine to achieve low latency. May I submit a new patch for that ? Should I revert the current ioburst workaround since we probably don't need two different workaround ?
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<tzimmermann>
jfalempe, i have recently reworked the fbdev handling for many drivers. specifically, there's now fbdev-shmem, which does away with the additonal shadow buffer. it's now used by mgag200 on drm-misc-next. it would be interesting to first see how that affects the problem
<jfalempe>
tzimmermann: sure I can test that, but I doubt it will have an impact, since memory-intensive application don't affect the latency.
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<tzimmermann>
jfalempe, there's one buffer less in the console's output. i'm thinking that might affect caching (and by extension latency). not sure if anything comes from that
<tzimmermann>
as in 'fewer cache misses; higher locality'
<tzimmermann>
just an idea
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<zmike>
eric_engestrom: pls just assign marge when you ack
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<polderan>
First I'll discuss the data indexing, it works so that one bank is value+contiguous_index+2xlengthfrom_const*nrofcell+bank_ffset where contiguous_index and bank_offset is filled in at runtime, and bank_offset is in range of 1024 with same size steps to subsequent banks. 2xlengthfrom_const is distance to known smallest elimination value times two, so upon eliminating first element, you have
<polderan>
1time distance for first element,two times distance for rest of elements, now you add bank times distances, it forms as 2times distance for first and three times the rest and banktimes-1 value+index, so you have to add banktimes value, that is gotten as allindexes+offset filled - allindexes+offset filled-alldistances the last which itself comes by filling in the offset and all indexes and
<polderan>
eliminating the constants by perbanktimes so we get 1time value+index and banktimes-1*2times value+index, so in other words after addition it combines as one times distance for first element and two times for second and other elements, removing all distances it's one elements distance missing, which removed from all the distances gets one a single distance, and this added to all values
<polderan>
allows to eliminate one value using an index on it too, and all values -allbutonevalue missing is the final operation accessing the value at index, the logics behind hence very simple arithmetic i.e simple linear algebra based derivative in integral computation but it is also expressed in logics as that resembles elimination based of mutual inclusion or exclusion. computation is simpler than
<polderan>
data access through compiling procedures. and what's also easy is encoding and decoding the powers to smaller and higher weights per power. result is super extreme performance machine when those accesses get mixed so data access to access instructions, and computation access through compiling for execution.
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<zmike>
DavidHeidelberg: you are also welcome to ack ^
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<DavidHeidelberg>
zmike: ack. Btw. why I need the bump? Some useful fixes?
<zmike>
yes
<zmike>
need to keep bumping
<zmike>
always
<DavidHeidelberg>
This would be interesting adept for the automated bumps then
<zmike>
yeah, doing a saturday bump every week (there's a guaranteed friday tag) would be nice
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<jasoneasydraw>
so I launch my last warning to your bomber and assaulting networks with your trash stories, you die through our hands if you talk to me in public, assault me or trash me through calling whores my wife, she is a thieve, who was taken care of already, I gave her crank gangsters a last warning if they do not honor those, and keep talking to me about me or harass my hotel we spawn a hitman
<jasoneasydraw>
list against your shit scum. and what airlied talks about is a lie, they assaulted me with British trash before I ever threatened them, you keep doing it retarded worms and soon I come after you with my team. it's just I have a list of assaulters to treat an extensive one, they end up in either similar situation broken bones and no teeth as the whores who trashed me or maybe we kill
<jasoneasydraw>
them I am deciding over this, we have loads of guns to do it.
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<p0ch1ta>
Hi
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<alyssa>
mareko: sorry I missed the MR, but what's the motivation for "nir: validate src_type of store_output"?
<p0ch1ta>
I was interested in the DRM task : Remove driver dependency on FB_DEVICE. I was wondering how to get started with it
<alyssa>
it blows up asahi, which neither reads nor writes src type. easy to fix - my fault for being sloppy - but I'm not sure why we have src_type at all for store_output
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<alyssa>
I don't really care - just took *checks clock* 5 minutes to deal with, faster than a ci pipeline would've been :p
<alyssa>
but also if we could just torch store_output's src_type, that would be cool
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<jenatali>
alyssa: It's currently load-bearing for us, just FYI
<alyssa>
jenatali: Terrifying! :-D
<jenatali>
DXIL annotates loads/stores with function overloads, so i32 vs i16 vs f32 vs f16 are different functions to call
<alyssa>
ouch
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<Company>
how does that get the acquire and release points?
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* Company
thinks his mental model is still missing an indirection somewhere
<mareko>
alyssa: the motivation was that src_type didn't match bit_size when I was writing a shader in NIR, which broke radeonsi, which could have been caught by nir_validate
<mareko>
alyssa: we could make src_type indicate float/int/uint, but not the bit size, which is already in nir_def
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<alyssa>
mareko: makes sense.
<alyssa>
I'm still not solid on why any backend other than DXIL and Zink care about the float/int/uint-ness, though
<alyssa>
but it's not a big deal
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