device: 0.815 socket: 0.807 vnc: 0.780 network: 0.752 graphic: 0.670 files: 0.568 boot: 0.509 semantic: 0.472 debug: 0.452 performance: 0.408 PID: 0.327 permissions: 0.309 other: 0.282 KVM: 0.026 hw/mc146818: error reading RTC_HOURS_ALARM get_next_alarm() doesn't read the RTC_HOURS_ALARM field correctly. - Bit 7 must be masked before conversion from BCD. - Care must be taken to check the don't care condition before masking. - The PM bit must be read from RTC_HOURS_ALARM, not from RTC_HOURS (as is done in convert_hour()). Seen in commit e376a788ae130454ad5e797f60cb70d0308babb6. The problem is obviously there, but I tried pretty hard to make it fail and couldn't so it seems latent. If you can, please provide a patch to tests/rtc-test.c that shows the bug. [Expired for QEMU because there has been no activity for 60 days.]