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authorChristian Krinitsin <mail@krinitsin.com>2025-07-03 19:39:53 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-07-03 19:39:53 +0200
commitdee4dcba78baf712cab403d47d9db319ab7f95d6 (patch)
tree418478faf06786701a56268672f73d6b0b4eb239 /results/classifier/118/unknown/1862874
parent4d9e26c0333abd39bdbd039dcdb30ed429c475ba (diff)
downloademulator-bug-study-dee4dcba78baf712cab403d47d9db319ab7f95d6.tar.gz
emulator-bug-study-dee4dcba78baf712cab403d47d9db319ab7f95d6.zip
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-KVM: 0.877
-virtual: 0.849
-register: 0.839
-performance: 0.836
-user-level: 0.812
-permissions: 0.804
-debug: 0.803
-mistranslation: 0.802
-graphic: 0.801
-risc-v: 0.800
-x86: 0.797
-TCG: 0.795
-device: 0.785
-VMM: 0.778
-architecture: 0.777
-vnc: 0.774
-ppc: 0.771
-boot: 0.763
-hypervisor: 0.763
-assembly: 0.751
-semantic: 0.750
-peripherals: 0.747
-network: 0.744
-arm: 0.741
-socket: 0.730
-i386: 0.712
-kernel: 0.711
-files: 0.704
-PID: 0.680
-
-java may stuck for a long time in system mode with "-cpu max"
-
-Bug Description:
-Run "java -version" in guest VM, java may stuck for a long time (several hours) and then recover.
-
-Steps to reproduce:
-1. Launch VM by attached simple script: launch.sh
-2. Execute "java -version" and then print "date" in a loop
- while :
- do
- /home/bot/jdk/bin/java -version
- date
- done
-3. A long time gap will be observed: may > 24 hours.
-
-Technical details:
-* host: x86_64 Linux 4.15.0-70-generic
-* qemu v4.2.0
-* java: tried two versions: openjdk-11-jre-headless or compiled java-13
-* command-line: (See details in launch.sh)
-/home/bot/qemu/qemu-build/qemu-4.2.0/binaries/bin/qemu-system-x86_64 \
- -drive "file=${img},format=qcow2" \
- -drive "file=${user_data},format=raw" \
- -cpu max \
- -m 24G \
- -serial mon:stdio \
- -smp 8 \
- -nographic \
-;
-
-* Observed by java core dump generated by "kill -SIGSEGV" when java stucked:
-Different pthreads are blocked on their own condition variables:
-
- Id Target Id Frame
- 1 Thread 0x7f48a041a080 (LWP 22470) __GI_raise (sig=sig@entry=6)
- at ../sysdeps/unix/sysv/linux/raise.c:51
- 2 Thread 0x7f487197d700 (LWP 22473) 0x00007f489f5c49f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f48980197c0)
- at ../sysdeps/unix/sysv/linux/futex-internal.h:88
- 3 Thread 0x7f4861b89700 (LWP 22483) 0x00007f489f5c4ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f4861b88960, expected=0,
- futex_word=0x7f489801b084)
- at ../sysdeps/unix/sysv/linux/futex-internal.h:142
- 4 Thread 0x7f4861e8c700 (LWP 22480) 0x00007f489f5c76d6 in futex_abstimed_wait_cancelable (private=0, abstime=0x0, expected=0, futex_word=0x7f48980107c0)
- at ../sysdeps/unix/sysv/linux/futex-internal.h:205
- 5 Thread 0x7f4861c8a700 (LWP 22482) 0x00007f489f5c4ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f4861c89800, expected=0,
- futex_word=0x7f489801ed44)
- at ../sysdeps/unix/sysv/linux/futex-internal.h:142
- 6 Thread 0x7f48a0418700 (LWP 22471) 0x00007f4880b13200 in ?? ()
- 7 Thread 0x7f48703ea700 (LWP 22478) 0x00007f489f5c49f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f489801dfc0)
- at ../sysdeps/unix/sysv/linux/futex-internal.h:88
- 8 Thread 0x7f48702e9700 (LWP 22479) 0x00007f489f5c49f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f489838cd84)
- at ../sysdeps/unix/sysv/linux/futex-internal.h:88
- 9 Thread 0x7f4870f71700 (LWP 22475) 0x00007f489f5c49f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f489801a300)
- at ../sysdeps/unix/sysv/linux/futex-internal.h:88
- 10 Thread 0x7f487187b700 (LWP 22474) 0x00007f489f5c76d6 in futex_abstimed_wait_cancelable (private=0, abstime=0x0, expected=0, futex_word=0x7f48980cf770)
- at ../sysdeps/unix/sysv/linux/futex-internal.h:205
- 11 Thread 0x7f4871a7f700 (LWP 22472) 0x00007f489f5c76d6 in futex_abstimed_wait_cancelable (private=0, abstime=0x0, expected=0, futex_word=0x7f489809ba30)
- at ../sysdeps/unix/sysv/linux/futex-internal.h:205
- 12 Thread 0x7f4861d8b700 (LWP 22481) 0x00007f489f5c4ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f4861d8a680, expected=0,
- futex_word=0x7f489801ed44)
- at ../sysdeps/unix/sysv/linux/futex-internal.h:142
- 13 Thread 0x7f48704ec700 (LWP 22477) 0x00007f489f5c4ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f48704eb910, expected=0,
- futex_word=0x7f489801d120)
- at ../sysdeps/unix/sysv/linux/futex-internal.h:142
- 14 Thread 0x7f4870e6f700 (LWP 22476) 0x00007f489f5c4ed9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f4870e6eb20, expected=0,
- futex_word=0x7f489828abd0)
- at ../sysdeps/unix/sysv/linux/futex-internal.h:142
-
-
-
-Have you tried with KVM ("-M accel=kvm")?
-
-Please try "strace -o /var/tmp/java.log -f java -version" and upload the strace. If the strace is very large, it's probably safe to remove everything after around 10 seconds.
-
-The QEMU project is currently moving its bug tracking to another system.
-For this we need to know which bugs are still valid and which could be
-closed already. Thus we are setting the bug state to "Incomplete" now.
-
-If the bug has already been fixed in the latest upstream version of QEMU,
-then please close this ticket as "Fix released".
-
-If it is not fixed yet and you think that this bug report here is still
-valid, then you have two options:
-
-1) If you already have an account on gitlab.com, please open a new ticket
-for this problem in our new tracker here:
-
- https://gitlab.com/qemu-project/qemu/-/issues
-
-and then close this ticket here on Launchpad (or let it expire auto-
-matically after 60 days). Please mention the URL of this bug ticket on
-Launchpad in the new ticket on GitLab.
-
-2) If you don't have an account on gitlab.com and don't intend to get
-one, but still would like to keep this ticket opened, then please switch
-the state back to "New" or "Confirmed" within the next 60 days (other-
-wise it will get closed as "Expired"). We will then eventually migrate
-the ticket automatically to the new system (but you won't be the reporter
-of the bug in the new system and thus you won't get notified on changes
-anymore).
-
-Thank you and sorry for the inconvenience.
-
-
-[Expired for QEMU because there has been no activity for 60 days.]
-