On 03/02/15 at 01:47P, bugzilla-nore...@freebsd.org wrote: > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=198148 > > Bug ID: 198148 > Summary: [hwpmc] pmcstat -G doesn't resolve symbols from > userland processes > Product: Base System > Version: 11.0-CURRENT > Hardware: Any > OS: Any > Status: New > Severity: Affects Only Me > Priority: --- > Component: kern > Assignee: freebsd-bugs@FreeBSD.org > Reporter: adr...@freebsd.org > > pmcstat -G doesn't seem to resolve symbols from userland processes correctly > or > reliably. In almost every instance, running pmcstat -G on a log file just > plainly doesn't resolve anything that isn't a kernel symbol. > > To reproduce: > > * run some very CPU busy process with lots of threads and syscalls; > * run pmcstat -O to record events to a logfile; > * when you're done, try using pmcstat -R <file> -G to spit out the callgraph > to > stdout. > > Even if all of the events are process-spec, I see /just/ kernel events. > > This happens on both -HEAD and -10.
On -HEAD (r278050M), I do see non-kernel events.
# pmcstat -S instructions -O /var/tmp/sample
# pmcstat -R /var/tmp/sample -G /var/tmp/sample.callgraph
In sample.callgraph, I see things like
00.24% [1] sqlite3_column_bytes @ /usr/local/lib/libsqlite3.so.0.8.6
100.0% [1] 0xdb799d @ /usr/local/lib/firefox/libxul.so
00.24% [1] unixShmLock @ /usr/local/lib/libsqlite3.so.0.8.6
100.0% [1] walTryBeginRead
100.0% [1] sqlite3PagerSharedLock
100.0% [1] sqlite3BtreeBeginTrans
100.0% [1] sqlite3VdbeExec
100.0% [1] sqlite3_step
100.0% [1] 0xdb06b1 @ /usr/local/lib/firefox/libxul.so
00.24% [1] copy_boxes @ /usr/local/lib/libcairo.so.2.11200.18
100.0% [1] clip_and_composite_boxes
100.0% [1] _cairo_traps_compositor_paint
100.0% [1] _cairo_compositor_paint
100.0% [1] _cairo_surface_paint
100.0% [1] _cairo_gstate_paint
100.0% [1] _cairo_default_context_paint_with_alpha
100.0% [1] cairo_paint_with_alpha
100.0% [1] 0xf540c6 @ /usr/local/lib/firefox/libxul.so
Am I understanding this correctly?
cheers,
Hiren
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