diff options
author | George Dunlap <george.dunlap@eu.citrix.com> | 2012-02-23 10:17:21 +0000 |
---|---|---|
committer | George Dunlap <george.dunlap@eu.citrix.com> | 2012-02-23 10:17:21 +0000 |
commit | 3ffbb6bf35abbf33b04e98a04123ab6b2c9fd4b8 (patch) | |
tree | ed379d7f25ca5930b794ca74f58c573096b402f8 /xen/common/sched_credit.c | |
parent | 7a191adcfb36836c7ee472e2daa50bdad365e484 (diff) | |
download | xen-3ffbb6bf35abbf33b04e98a04123ab6b2c9fd4b8.tar.gz xen-3ffbb6bf35abbf33b04e98a04123ab6b2c9fd4b8.tar.bz2 xen-3ffbb6bf35abbf33b04e98a04123ab6b2c9fd4b8.zip |
scheduler: Implement SCHEDOP sysctl for credit scheduler
Allow tslice_ms and ratelimit_us to be modified.
Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
Committed-by: Keir Fraser <keir@xen.org>
Diffstat (limited to 'xen/common/sched_credit.c')
-rw-r--r-- | xen/common/sched_credit.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/xen/common/sched_credit.c b/xen/common/sched_credit.c index 2579a226a0..df1ba3249b 100644 --- a/xen/common/sched_credit.c +++ b/xen/common/sched_credit.c @@ -833,6 +833,36 @@ csched_dom_cntl( return 0; } +static int +csched_sys_cntl(const struct scheduler *ops, + struct xen_sysctl_scheduler_op *sc) +{ + int rc = -EINVAL; + xen_sysctl_credit_schedule_t *params = &sc->u.sched_credit; + struct csched_private *prv = CSCHED_PRIV(ops); + + switch ( sc->cmd ) + { + case XEN_SYSCTL_SCHEDOP_putinfo: + if (params->tslice_ms > XEN_SYSCTL_CSCHED_TSLICE_MAX + || params->tslice_ms < XEN_SYSCTL_CSCHED_TSLICE_MIN + || params->ratelimit_us > XEN_SYSCTL_SCHED_RATELIMIT_MAX + || params->ratelimit_us < XEN_SYSCTL_SCHED_RATELIMIT_MIN + || MICROSECS(params->ratelimit_us) > MILLISECS(params->tslice_ms) ) + goto out; + prv->tslice_ms = params->tslice_ms; + prv->ratelimit_us = params->ratelimit_us; + /* FALLTHRU */ + case XEN_SYSCTL_SCHEDOP_getinfo: + params->tslice_ms = prv->tslice_ms; + params->ratelimit_us = prv->ratelimit_us; + rc = 0; + break; + } + out: + return rc; +} + static void * csched_alloc_domdata(const struct scheduler *ops, struct domain *dom) { @@ -1566,6 +1596,28 @@ csched_init(struct scheduler *ops) INIT_LIST_HEAD(&prv->active_sdom); prv->master = UINT_MAX; + if ( sched_credit_tslice_ms > XEN_SYSCTL_CSCHED_TSLICE_MAX + || sched_credit_tslice_ms < XEN_SYSCTL_CSCHED_TSLICE_MIN ) + { + printk("WARNING: sched_credit_tslice_ms outside of valid range [%d,%d].\n" + " Resetting to default %u\n", + XEN_SYSCTL_CSCHED_TSLICE_MIN, + XEN_SYSCTL_CSCHED_TSLICE_MAX, + CSCHED_DEFAULT_TSLICE_MS); + sched_credit_tslice_ms = CSCHED_DEFAULT_TSLICE_MS; + } + + if ( sched_ratelimit_us > XEN_SYSCTL_SCHED_RATELIMIT_MAX + || sched_ratelimit_us < XEN_SYSCTL_SCHED_RATELIMIT_MIN ) + { + printk("WARNING: sched_ratelimit_us outside of valid range [%d,%d].\n" + " Resetting to default %u\n", + XEN_SYSCTL_SCHED_RATELIMIT_MIN, + XEN_SYSCTL_SCHED_RATELIMIT_MAX, + SCHED_DEFAULT_RATELIMIT_US); + sched_ratelimit_us = SCHED_DEFAULT_RATELIMIT_US; + } + prv->tslice_ms = sched_credit_tslice_ms; prv->ticks_per_tslice = CSCHED_TICKS_PER_TSLICE; if ( prv->tslice_ms < prv->ticks_per_tslice ) @@ -1641,6 +1693,7 @@ const struct scheduler sched_credit_def = { .yield = csched_vcpu_yield, .adjust = csched_dom_cntl, + .adjust_global = csched_sys_cntl, .pick_cpu = csched_cpu_pick, .do_schedule = csched_schedule, |