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authorStefan Raspl2018-02-22 12:16:28 +0100
committerPaolo Bonzini2018-02-24 01:43:44 +0100
commit18e8f4100ef14f924514fbd91eb67bd5fa5396b7 (patch)
tree72bb4907359c017fb85deab5f216ed97879d44a9 /drivers/iio
parent516f1190a1e0cce12128a6446e6438745c8de62a (diff)
tools/kvm_stat: separate drilldown and fields filtering
Drilldown (i.e. toggle display of child trace events) was implemented by overriding the fields filter. This resulted in inconsistencies: E.g. when drilldown was not active, adding a filter that also matches child trace events would not only filter fields according to the filter, but also add in the child trace events matching the filter. E.g. on x86, setting 'kvm_userspace_exit' as the fields filter after startup would result in display of kvm_userspace_exit(DCR), although that wasn't previously present - not exactly what one would expect from a filter. This patch addresses the issue by keeping drilldown and fields filter separate. While at it, we also fix a PEP8 issue by adding a blank line at one place (since we're in the area...). We implement this by adding a framework that also allows to define a taxonomy among the debugfs events to identify child trace events. I.e. drilldown using 'x' can now also work with debugfs. A respective parent- child relationship is only known for S390 at the moment, but could be added adjusting other platforms' ARCH.dbg_is_child() methods accordingly. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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