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authorChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
commitd0c85e36e4de67af628d54e9ab577cc3fad7796a (patch)
treef8f784b0f04343b90516a338d6df81df3a85dfa2 /results/classifier/gemma3:12b/boot/2686
parent7f4364274750eb8cb39a3e7493132fca1c01232e (diff)
downloademulator-bug-study-d0c85e36e4de67af628d54e9ab577cc3fad7796a.tar.gz
emulator-bug-study-d0c85e36e4de67af628d54e9ab577cc3fad7796a.zip
add deepseek and gemma results
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+
+rng-seed addition causing test_loongarch64_virt.py to hang in EFI startup
+Description of problem:
+Since the rng-seed addition, the test_loongarch64_virt.py test will periodically hang.
+
+git bisect blames this
+
+```
+commit d9bd1ccbf1d84d872aed684c65fec33814b8ac1b
+Author: Jason A. Donenfeld <Jason@zx2c4.com>
+Date: Thu Sep 5 17:33:16 2024 +0200
+
+ hw/loongarch: virt: pass random seed to fdt
+
+ If the FDT contains /chosen/rng-seed, then the Linux RNG will use it to
+ initialize early. Set this using the usual guest random number
+ generation function.
+
+ This is the same procedure that's done in b91b6b5a2c ("hw/microblaze:
+ pass random seed to fdt"), e4b4f0b71c ("hw/riscv: virt: pass random seed
+ to fdt"), c6fe3e6b4c ("hw/openrisc: virt: pass random seed to fdt"),
+ 67f7e426e5 ("hw/i386: pass RNG seed via setup_data entry"), c287941a4d
+ ("hw/rx: pass random seed to fdt"), 5e19cc68fb ("hw/mips: boston: pass
+ random seed to fdt"), 6b23a67916 ("hw/nios2: virt: pass random seed to fdt")
+ c4b075318e ("hw/ppc: pass random seed to fdt"), and 5242876f37
+ ("hw/arm/virt: dt: add rng-seed property").
+
+ These earlier commits later were amended to rerandomize the RNG seed on
+ snapshot load, but the LoongArch code somehow already does that, despite
+ not having this patch here, presumably due to some lucky copy and
+ pasting.
+
+ Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+ Reviewed-by: Song Gao <gaosong@loongson.cn>
+ Message-Id: <20240905153316.2038769-1-Jason@zx2c4.com>
+ Signed-off-by: Song Gao <gaosong@loongson.cn>
+```
+
+When it hangs, test_loongarch64_virt.py will get stuck waiting for serial console output from the guest.
+
+Looking at the console.log file shows it to be completely empty.
+
+This appears to indicate it has hung before EDK has even initialized, as it has not even printed the 'Entering C environment' message
+Steps to reproduce:
+1. ./configure --target-list=loongarch64-softmmu
+2. make -j 20
+3. n=0 ; while true ; do n=$(expr $n + 1); echo $n ; QEMU_TEST_QEMU_BINARY=./build/qemu-system-loongarch64 PYTHONPATH=./python ./tests/functional/test_loongarch64_virt.py ; done
+
+Most commonly it will hang within 10 iterations, very occasionally needing upto 25