Messages in this thread | | | Date | Tue, 22 Aug 2017 10:45:18 +0200 | From | Jiri Olsa <> | Subject | Re: [PATCH v2 08/19] perf, tools: Expression parser enhancements for metrics |
| |
On Fri, Aug 11, 2017 at 04:26:23PM -0700, Andi Kleen wrote: > From: Andi Kleen <ak@linux.intel.com> > > Enhance the expression parser for more complex metric formulas. > > - Support python style IF ELSE operators > - Add an #SMT_On magic variable for formulas that depend on the SMT > status. > > Example: 4 *( CPU_CLK_UNHALTED.THREAD_ANY / 2 ) if #SMT_on else cycles > > - Support MIN/MAX operations > > Example: min(1 , IDQ.MITE_UOPS / ( UPI * 16 * ( ICACHE.HIT + ICACHE.MISSES ) / 4.0 ) ) > > This is useful to fix up problems caused by multiplexing. > > - Support | & ^ operators > - Minor cleanups and fixes > - Support an \ escape for operators. This allows to specify event names > like c2-residency > - Support @ as an alternative for / to be able to specify pmus without > conflicts with operators (like msr/tsc/ as msr@tsc@) > > Example: (cstate_core@c3\\-residency@ / msr@tsc@) * 100 > > Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
thanks, jirka
| |