#1125449 llama.cpp: autopkgtests with BLAS backend fail on arm64

Package:
llama.cpp
Source:
llama.cpp
Submitter:
Christian Kastner
Date:
2026-03-15 09:27:01 UTC
Severity:
normal
#1125449#5
Date:
2026-01-13 22:22:57 UTC
From:
To:
On arm64, the llama.cpp autopkgtests using the BLAS backends currently fail.
#1125449#10
Date:
2026-02-01 19:59:06 UTC
From:
To:
I erroneously filed the bug against llama.cpp, instead of ggml.

I'm lowering the severity because this test passes on ci.debian.net's
arm64. This could actually be a hardware-specific issue with my device
(Orion O6).

Furthermore, only a single test is affected:

MUL_MAT] ERR = 0.193812193 > 0.000500000
MUL_MAT(type_a=f32,type_b=f32,m=64,n=77,k=77,bs=[12,1],nr=[1,1],per=[0,1,2,3],k_v=0,o=1):
FAIL

I initially thought of skipping this one test, but it's better to keep
it for now, so that I can re-run it on other hardware.

Best,
Christian
#1125449#23
Date:
2026-02-16 22:12:53 UTC
From:
To:
That (single) BLAS test also failed on Graviton4.

Perhaps this is an SVE2 issue?