Avi Kivity wrote: > Jan Kiszka wrote: >> It's both: -rt tests were performed with nosmp (-rt locks up under SMP >> here), and the Xenomai tests, including the last instrumentation, ran in >> SMP mode. So I tend to exclude SMP effects. >> >> Do you have some suggestion how to analyse what the guest is executing >> while those IRQs are delayed? As I said, I suspect some interaction of >> the Bochs BIOS is triggering the effect, because it only shows up (with >> a Linux guest) before the BIOS prints the first messages. >> > > The guest is probably spinning. Can you try modifying > user/test/bootstrap.S, around the start label, to look like > > start: jmp start > > ? This can then be executed with > > user/kvmctl user/test/bootstrap user/test/access.flat
Access flat is not being built here (kvm-48), or I'm pressing the wrong button. Forcing it with "make test/access.flat" gives build errors. What's the trick? > > This will give us something consistent to test. The output of kvm_stat > should also be interesting (should show exits and irq_exits advancing at > 10K/sec). You probably mean with the artificial test, not with qemu/kvm. > > > (once Linux starts executing, it takes a lot of pagefault exits for the > mmu, and then a lot of hlt exit once it idles). > > Jan -- Siemens AG, Corporate Technology, CT SE 2 Corporate Competence Center Embedded Linux ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ kvm-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/kvm-devel
