On Wed, Aug 05, 2015 at 06:13:29PM +0300, Alexey Brodkin wrote: > Even though this hardware implementation allows for more flexibility, > in Linux kernel we decided to mimic behavior of other architectures this > way: > > [1] Set limit value as half of counter's max value (to allow counter to > run after reaching it limit, see below for more explanation): > ---------->8----------- > arc_pmu->max_period = (1ULL << counter_size) / 2 - 1ULL; > ---------->8-----------
> @@ -317,10 +365,11 @@ static int arc_pmu_device_probe(struct platform_device > *pdev) > return -ENOMEM; > > arc_pmu->n_counters = pct_bcr.c; > - arc_pmu->counter_size = 32 + (pct_bcr.s << 4); > + counter_size = 32 + (pct_bcr.s << 4); > + arc_pmu->max_period = (1ULL << counter_size) - 1ULL; > I don't see that /2 there.. -- 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/
