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Diffstat (limited to 'results/classifier/deepseek-2-tmp/output/performance/1774677')
| -rw-r--r-- | results/classifier/deepseek-2-tmp/output/performance/1774677 | 21 |
1 files changed, 0 insertions, 21 deletions
diff --git a/results/classifier/deepseek-2-tmp/output/performance/1774677 b/results/classifier/deepseek-2-tmp/output/performance/1774677 deleted file mode 100644 index 5be3bb3d7..000000000 --- a/results/classifier/deepseek-2-tmp/output/performance/1774677 +++ /dev/null @@ -1,21 +0,0 @@ - --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 |