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nak: Increase Imma latencies on Blackwell by 4

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We already do +8 on HMMA.  This gives us a +4 on IMMA which seems to fix
the test failures I'm seeing.  This fixes the IMMA CTS tests on my RTX
5090 with NAK_DEBUG=spill.

Fixes: 477533ee00 ("nvk: add sm120 latencies via csv files.")
Reviewed-by: Mel Henning <mhenning@darkrefraction.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36524>
This commit is contained in:
Faith Ekstrand 2025-08-01 16:33:26 -04:00 • committed by Marge Bot
parent 606fa193af
commit ab97fea323
1 changed files with 4 additions and 0 deletions
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4
src/nouveau/compiler/nak/sm120_instr_latencies.rs
View file

@ -428,6 +428,10 @@ impl SM120Latency {
|| read_latency == RegLatencySM100::Hmma
{
RegLatencySM100::raw(write_latency, read_latency, false) + 9
} else if write_latency == RegLatencySM100::Imma
|| read_latency == RegLatencySM100::Imma
{
RegLatencySM100::raw(write_latency, read_latency, false) + 5
} else {
RegLatencySM100::raw(write_latency, read_latency, false) + 1
}