Hi list, I looked at the xenoprof, did some sampling and got results I don''t fully understand. First I tried to sample dom0 user events with --event CPU_CLK_UNHALTED:100000:0:0:1 Here I saw samples from dom0 user and dom0 kernel. This is OK for me because dom0 kernel runs with cpl 3 too. But there were some samples from the hypervisor too (symbol validate_gl3e). Then I tried to sample only do0 kernel events with --event CPU_CLK_UNHALTED:100000:0:1:0 what means sampling only in cpl 0. But I got samples from dom0-kernel, hypervisor and few samples from the user land in dom0 too. The conclusion is that it seems that sometimes user runs in cpl 0 and sometimes hypervisor in cpl > 0. As I understand from the spec a vmexit leads always to cpl 0. So hypervisor code should never run in cpl > 0? But is there a possibility where user land code runs in cpl 0 in few cases? Please can anybody give me a light on this behavior or a link in doc or source! Thanks. Dietmar. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel