static int sched_credit_domain_set(libxl__gc *gc, uint32_t domid,
const libxl_domain_sched_params *scinfo)
{
struct xen_domctl_sched_credit sdom;
xc_domaininfo_t domaininfo;
int rc;
rc = xc_domain_getinfolist(CTX->xch, domid, 1, &domaininfo);
if (rc < 0) {
LOGED(ERROR, domid, "Getting domain info list");
return ERROR_FAIL;
}
if (rc != 1 || domaininfo.domain != domid)
return ERROR_INVAL;
rc = xc_sched_credit_domain_get(CTX->xch, domid, &sdom);
if (rc != 0) {
LOGED(ERROR, domid, "Getting domain sched credit");
return ERROR_FAIL;
}
if (scinfo->weight != LIBXL_DOMAIN_SCHED_PARAM_WEIGHT_DEFAULT) {
if (scinfo->weight < 1 || scinfo->weight > 65535) {
LOGD(ERROR, domid, "Cpu weight out of range, "
"valid values are within range from 1 to 65535");
return ERROR_INVAL;
}
sdom.weight = scinfo->weight;
}
if (scinfo->cap != LIBXL_DOMAIN_SCHED_PARAM_CAP_DEFAULT) {
if (scinfo->cap < 0
|| scinfo->cap > (domaininfo.max_vcpu_id + 1) * 100) {
LOGD(ERROR, domid, "Cpu cap out of range, "
"valid range is from 0 to %d for specified number of vcpus",
((domaininfo.max_vcpu_id + 1) * 100));
return ERROR_INVAL;
}
sdom.cap = scinfo->cap;
}
rc = xc_sched_credit_domain_set(CTX->xch, domid, &sdom);
if ( rc < 0 ) {
LOGED(ERROR, domid, "Setting domain sched credit");
return ERROR_FAIL;
}
return 0;
}
static int sched_credit_domain_get(libxl__gc *gc, uint32_t domid,
libxl_domain_sched_params *scinfo)
{
struct xen_domctl_sched_credit sdom;
int rc;
rc = xc_sched_credit_domain_get(CTX->xch, domid, &sdom);
if (rc != 0) {
LOGED(ERROR, domid, "Getting domain sched credit");
return ERROR_FAIL;
}
libxl_domain_sched_params_init(scinfo);
scinfo->sched = LIBXL_SCHEDULER_CREDIT;
scinfo->weight = sdom.weight;
scinfo->cap = sdom.cap;
return 0;
}
static void configure_vcpus(struct flags f){
struct xen_domctl_sched_credit sdom;
int i, j, r, size, pcpus_supplied, min;
xc_cpumap_t cpumap;
size = xc_get_cpumap_size(xch) * 8; /* array is of uint8_t */
for (i=0; i<f.vcpus; i++){
if (f.vcpu_affinity[i]){ /* NULL means unset */
pcpus_supplied = strlen(f.vcpu_affinity[i]);
min = (pcpus_supplied < size)?pcpus_supplied:size;
cpumap = xc_cpumap_alloc(xch);
if (cpumap == NULL)
failwith_oss_xc("xc_cpumap_alloc");
for (j=0; j<min; j++) {
if (f.vcpu_affinity[i][j] == '1')
cpumap[j/8] |= 1 << (j&7);
}
r = xc_vcpu_setaffinity(xch, domid, i, cpumap, NULL,
XEN_VCPUAFFINITY_HARD);
free(cpumap);
if (r) {
failwith_oss_xc("xc_vcpu_setaffinity");
}
}
}
r = xc_sched_credit_domain_get(xch, domid, &sdom);
/* This should only happen when a different scheduler is set */
if (r) {
xg_info("Failed to get credit scheduler parameters: scheduler not enabled?\n");
return;
}
if (f.vcpu_weight != 0L) sdom.weight = f.vcpu_weight;
if (f.vcpu_cap != 0L) sdom.cap = f.vcpu_cap;
/* This shouldn't fail, if "get" above succeeds. This error is fatal
to highlight the need to investigate further. */
r = xc_sched_credit_domain_set(xch, domid, &sdom);
if (r)
failwith_oss_xc("xc_sched_credit_domain_set");
}
