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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 07:27:52 +0000 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 07:27:52 +0000 |
| commit | d0c85e36e4de67af628d54e9ab577cc3fad7796a (patch) | |
| tree | f8f784b0f04343b90516a338d6df81df3a85dfa2 /results/classifier/gemma3:12b/performance/1774677 | |
| parent | 7f4364274750eb8cb39a3e7493132fca1c01232e (diff) | |
| download | qemu-analysis-d0c85e36e4de67af628d54e9ab577cc3fad7796a.tar.gz qemu-analysis-d0c85e36e4de67af628d54e9ab577cc3fad7796a.zip | |
add deepseek and gemma results
Diffstat (limited to 'results/classifier/gemma3:12b/performance/1774677')
| -rw-r--r-- | results/classifier/gemma3:12b/performance/1774677 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/results/classifier/gemma3:12b/performance/1774677 b/results/classifier/gemma3:12b/performance/1774677 new file mode 100644 index 000000000..5be3bb3d7 --- /dev/null +++ b/results/classifier/gemma3:12b/performance/1774677 @@ -0,0 +1,21 @@ + +-icount increases boot time by >10x + +When I specify the -icount option, some guest operations such as booting a Linux kernel take more than 10 times longer than otherwise. For example, the following will boot Aboriginal Linux to the login prompt about 6 seconds on my system (using TCG, not KVM): + +wget http://landley.net/aboriginal/downloads/old/binaries/1.4.5/system-image-i686.tar.gz +gunzip <system-image-i686.tar.gz | tar xfv - +cd system-image-i686 +sh run-emulator.sh + +If I replace the last line with + +QEMU_EXTRA="-icount shift=auto" sh run-emulator.sh + +booting to the login prompt takes about 1 minute 20 seconds. + +I have tried different values for "shift" other than the "auto" used above, but have not been able to find one that gives reasonable performance. Specifying "sleep=off" also did not help. + +During the slow boots, qemu appears to spend most of its time sleeping, not using the host CPU. + +I see this with multiple versions of qemu, including current git sources (c181ddaa176856b3cd2dfd12bbcf25fa9c884a97), and on multiple host OSes, including Debian 9 on x86_64. \ No newline at end of file |