search for: tick_period_us

...CE_MS; +integer_param("sched_credit_tslice_ms", sched_credit_tslice_ms); /* * Physical CPU @@ -176,6 +172,9 @@ struct csched_private { uint32_t credit; int credit_balance; uint32_t runq_sort; + /* Period of master and tick in milliseconds */ + unsigned tslice_ms, tick_period_us, ticks_per_tslice; + unsigned credits_per_tslice; }; static void csched_tick(void *_cpu); @@ -326,7 +325,7 @@ csched_free_pdata(const struct scheduler spin_lock_irqsave(&prv->lock, flags); - prv->credit -= CSCHED_CREDITS_PER_ACCT; + prv->credit -= prv->credits_...

...+static inline void +__csched_set_tslice(struct csched_private *prv, unsigned timeslice) +{ + prv->tslice_ms = timeslice; + prv->ticks_per_tslice = CSCHED_TICKS_PER_TSLICE; + if ( prv->tslice_ms < prv->ticks_per_tslice ) + prv->ticks_per_tslice = 1; + prv->tick_period_us = prv->tslice_ms * 1000 / prv->ticks_per_tslice; + prv->credits_per_tslice = CSCHED_CREDITS_PER_MSEC * prv->tslice_ms; +} + static int csched_sys_cntl(const struct scheduler *ops, struct xen_sysctl_scheduler_op *sc) @@ -1089,7 +1100,7 @@ csched_sys_cntl(con...

...lice_ms; prv->ratelimit_us = params->ratelimit_us; ------- /* my patch: these parameters should also be changed */ prv->ticks_per_tslice = CSCHED_TICKS_PER_TSLICE; if ( prv->tslice_ms < prv->ticks_per_tslice ) prv->ticks_per_tslice = 1; prv->tick_period_us = prv->tslice_ms * 1000 / prv->ticks_per_tslice; prv->credits_per_tslice = CSCHED_CREDITS_PER_MSEC * prv->tslice_ms; ------- ... } Particularly, [prv->credits_per_tslice] is very important to maintain the *fairness* of credit allocation in csched_acct(). This bug has been...

Hello everyone, this is the very first version of the patch series that introduces ARMv7 with virtualization extensions support in Xen. The series allows Xen and Dom0 to boot on a Cortex-A15 based Versatile Express simulator. See the following announce email for more informations about what we are trying to achieve, as well as the original git history: See