On Sat, Apr 27, 2013 at 06:14:07PM +0200, Borislav Petkov wrote: ... Thanks a LOT, Borislav!
> The other trivial test passes too, although branch-misses doesn't get > counted: > > ./perf stat sleep 1 > > Performance counter stats for 'sleep 1': > > 1.433368 task-clock # 0.001 CPUs utilized > > 1 context-switches # 0.698 K/sec > > 0 cpu-migrations # 0.000 K/sec > > 147 page-faults # 0.103 M/sec > > 78,446 cycles # 0.055 GHz > > 0 stalled-cycles-frontend # 0.00% frontend cycles idle > > 0 stalled-cycles-backend # 0.00% backend cycles idle > [27.37%] > 1,268,044 instructions # 16.16 insns per cycle > [27.37%] > 223,742 branches # 156.095 M/sec > [27.37%] > <not counted> branch-misses > > 1.002191045 seconds time elapsed It's known effect. instructions retired and branch-misses can't run simultaneously since they both use same escr msr register (if I recall correctly, out of repo at moment). > However, if I do this, it works: > > ./perf stat -e branch-misses sleep 1 > > Performance counter stats for 'sleep 1': > > 8,583 branch-misses > > 1.001992384 seconds time elapsed Thanks! -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
