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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v8 for Xen 4.7 4/4] xl: enable per-VCPU parameter for RTDS
Change main_sched_rtds and related output functions to support
per-VCPU settings.
Signed-off-by: Chong Li <chong.li@xxxxxxxxx>
Signed-off-by: Meng Xu <mengxu@xxxxxxxxxxxxx>
Signed-off-by: Sisu Xi <xisisu@xxxxxxxxx>
---
Changes on PATCH v7:
1) Add example to xl.pod.1
Changes on PATCH v6:
1) More explain in xl.pod.1 and cmdtable.c
2) Resolve some coding sytle issues
Changes on PATCH v5:
1) Add sched_vcpu_set_all() for the cases that all vcpus of a
domain need to be changed together.
Changes on PATCH v4:
1) Coding style changes
Changes on PATCH v3:
1) Support commands, e.g., "xl sched-rtds -d vm1" to output the
default scheduling parameters
Changes on PATCH v2:
1) Remove per-domain output functions for RTDS scheduler.
2) Users now use '-v all' to specify all VCPUs.
3) Support outputting a subset of the parameters of the VCPUs
of a specific domain.
4) When setting all VCPUs with the same parameters (by only one
command), no per-domain function is invoked.
CC: <dario.faggioli@xxxxxxxxxx>
CC: <george.dunlap@xxxxxxxxxxxxx>
CC: <dgolomb@xxxxxxxxxxxxxx>
CC: <mengxu@xxxxxxxxxxxxx>
CC: <wei.liu2@xxxxxxxxxx>
CC: <lichong659@xxxxxxxxx>
---
docs/man/xl.pod.1 | 77 ++++++++++++
tools/libxl/xl_cmdimpl.c | 301 +++++++++++++++++++++++++++++++++++++++++-----
tools/libxl/xl_cmdtable.c | 4 +-
3 files changed, 348 insertions(+), 34 deletions(-)
diff --git a/docs/man/xl.pod.1 b/docs/man/xl.pod.1
index 4279c7c..0350baa 100644
--- a/docs/man/xl.pod.1
+++ b/docs/man/xl.pod.1
@@ -1051,6 +1051,10 @@ B<OPTIONS>
Specify domain for which scheduler parameters are to be modified or retrieved.
Mandatory for modifying scheduler parameters.
+=item B<-v VCPUID/all>, B<--vcpuid=VCPUID/all>
+
+Specify vcpu for which scheduler parameters are to be modified or retrieved.
+
=item B<-p PERIOD>, B<--period=PERIOD>
Period of time, in microseconds, over which to replenish the budget.
@@ -1066,6 +1070,79 @@ Restrict output to domains in the specified cpupool.
=back
+B<EXAMPLE>
+
+=over 4
+
+1) show the budget and period of each VCPU of each domain,
+by using "xl sched-rtds -v all" command. An example would be like:
+
+xl sched-rtds -v all
+
+Cpupool Pool-0: sched=RTDS
+
+ Name ID VCPU Period Budget
+ Domain-0 0 0 10000 4000
+ vm1 1 0 300 150
+ vm1 1 1 400 200
+ vm1 1 2 10000 4000
+ vm1 1 3 1000 500
+ vm2 2 0 10000 4000
+ vm2 2 1 10000 4000
+
+Using "xl sched-rtds" will output the default scheduling parameters
+for each domain. An example would be like:
+
+xl sched-rtds
+
+Cpupool Pool-0: sched=RTDS
+
+ Name ID Period Budget
+ Domain-0 0 10000 4000
+ vm1 1 10000 4000
+ vm2 2 10000 4000
+
+
+2) show the budget and period of each VCPU of a specific domain,
+by using, e.g., "xl sched-rtds -d vm1 -v all" command. The output
+would be like:
+
+xl sched-rtds -d vm1 -v all
+
+ Name ID VCPU Period Budget
+ vm1 1 0 300 150
+ vm1 1 1 400 200
+ vm1 1 2 10000 4000
+ vm1 1 3 1000 500
+
+To show a subset of the parameters of the VCPUs of a specific domain,
+please use, e.g.,"xl sched-rtds -d vm1 -v 0 -v 3" command.
+The output would be:
+
+xl sched-rtds -d vm1 -v 0 -v 3
+
+ Name ID VCPU Period Budget
+ vm1 1 0 300 150
+ vm1 1 3 1000 500
+
+Using command, e.g., "xl sched-rtds -d vm1" will output the default
+scheduling parameters of vm1. An example would be like:
+
+xl sched-rtds -d vm1
+
+ Name ID Period Budget
+ vm1 1 10000 4000
+
+
+3) Users can set the budget and period of multiple VCPUs of a
+specific domain with only one command,
+e.g., "xl sched-rtds -d vm1 -v 0 -p 100 -b 50 -v 3 -p 300 -b 150".
+
+Users can set all VCPUs with the same parameters, by one command.
+e.g., "xl sched-rtds -d vm1 -v all -p 500 -b 250".
+
+=back
+
=back
=head1 CPUPOOLS COMMANDS
diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index 2b6371d..97e8b33 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -5823,6 +5823,52 @@ static int sched_domain_set(int domid, const
libxl_domain_sched_params *scinfo)
return 0;
}
+static int sched_vcpu_get(libxl_scheduler sched, int domid,
+ libxl_vcpu_sched_params *scinfo)
+{
+ int rc;
+
+ rc = libxl_vcpu_sched_params_get(ctx, domid, scinfo);
+ if (rc) {
+ fprintf(stderr, "libxl_vcpu_sched_params_get failed.\n");
+ exit(-1);
+ }
+ if (scinfo->sched != sched) {
+ fprintf(stderr, "libxl_vcpu_sched_params_get returned %s not %s.\n",
+ libxl_scheduler_to_string(scinfo->sched),
+ libxl_scheduler_to_string(sched));
+ return 1;
+ }
+
+ return 0;
+}
+
+static int sched_vcpu_set(int domid, const libxl_vcpu_sched_params *scinfo)
+{
+ int rc;
+
+ rc = libxl_vcpu_sched_params_set(ctx, domid, scinfo);
+ if (rc) {
+ fprintf(stderr, "libxl_vcpu_sched_params_set failed.\n");
+ exit(-1);
+ }
+
+ return rc;
+}
+
+static int sched_vcpu_set_all(int domid, const libxl_vcpu_sched_params *scinfo)
+{
+ int rc;
+
+ rc = libxl_vcpu_sched_params_set_all(ctx, domid, scinfo);
+ if (rc) {
+ fprintf(stderr, "libxl_vcpu_sched_params_set failed.\n");
+ exit(-1);
+ }
+
+ return rc;
+}
+
static int sched_credit_params_set(int poolid, libxl_sched_credit_params
*scinfo)
{
if (libxl_sched_credit_params_set(ctx, poolid, scinfo)) {
@@ -5942,6 +5988,37 @@ static int sched_rtds_domain_output(
return 0;
}
+static int sched_rtds_vcpu_output(int domid, libxl_vcpu_sched_params *scinfo)
+{
+ char *domname;
+ int rc = 0;
+ int i;
+
+ if (domid < 0) {
+ printf("%-33s %4s %4s %9s %9s\n", "Name", "ID",
+ "VCPU", "Period", "Budget");
+ return 0;
+ }
+
+ rc = sched_vcpu_get(LIBXL_SCHEDULER_RTDS, domid, scinfo);
+ if (rc)
+ goto out;
+
+ domname = libxl_domid_to_name(ctx, domid);
+ for ( i = 0; i < scinfo->num_vcpus; i++ ) {
+ printf("%-33s %4d %4d %9"PRIu32" %9"PRIu32"\n",
+ domname,
+ domid,
+ scinfo->vcpus[i].vcpuid,
+ scinfo->vcpus[i].period,
+ scinfo->vcpus[i].budget);
+ }
+ free(domname);
+
+out:
+ return rc;
+}
+
static int sched_rtds_pool_output(uint32_t poolid)
{
char *poolname;
@@ -6015,6 +6092,65 @@ static int sched_domain_output(libxl_scheduler sched,
int (*output)(int),
return 0;
}
+static int sched_vcpu_output(libxl_scheduler sched,
+ int (*output)(int, libxl_vcpu_sched_params *),
+ int (*pooloutput)(uint32_t), const char *cpupool)
+{
+ libxl_dominfo *info;
+ libxl_cpupoolinfo *poolinfo = NULL;
+ uint32_t poolid;
+ int nb_domain, n_pools = 0, i, p;
+ int rc = 0;
+
+ if (cpupool) {
+ if (libxl_cpupool_qualifier_to_cpupoolid(ctx, cpupool, &poolid, NULL)
+ || !libxl_cpupoolid_is_valid(ctx, poolid)) {
+ fprintf(stderr, "unknown cpupool \'%s\'\n", cpupool);
+ return 1;
+ }
+ }
+
+ info = libxl_list_domain(ctx, &nb_domain);
+ if (!info) {
+ fprintf(stderr, "libxl_list_domain failed.\n");
+ return 1;
+ }
+ poolinfo = libxl_list_cpupool(ctx, &n_pools);
+ if (!poolinfo) {
+ fprintf(stderr, "error getting cpupool info\n");
+ libxl_dominfo_list_free(info, nb_domain);
+ return 1;
+ }
+
+ for (p = 0; !rc && (p < n_pools); p++) {
+ if ((poolinfo[p].sched != sched) ||
+ (cpupool && (poolid != poolinfo[p].poolid)))
+ continue;
+
+ pooloutput(poolinfo[p].poolid);
+
+ libxl_vcpu_sched_params scinfo_out;
+ libxl_vcpu_sched_params_init(&scinfo_out);
+ output(-1, &scinfo_out);
+ libxl_vcpu_sched_params_dispose(&scinfo_out);
+ for (i = 0; i < nb_domain; i++) {
+ if (info[i].cpupool != poolinfo[p].poolid)
+ continue;
+ libxl_vcpu_sched_params scinfo;
+ libxl_vcpu_sched_params_init(&scinfo);
+ scinfo.num_vcpus = 0;
+ rc = output(info[i].domid, &scinfo);
+ libxl_vcpu_sched_params_dispose(&scinfo);
+ if (rc)
+ break;
+ }
+ }
+
+ libxl_cpupoolinfo_list_free(poolinfo, n_pools);
+ libxl_dominfo_list_free(info, nb_domain);
+ return 0;
+}
+
/*
* <nothing> : List all domain params and sched params from all
pools
* -d [domid] : List domain params for domain
@@ -6215,84 +6351,183 @@ int main_sched_credit2(int argc, char **argv)
/*
* <nothing> : List all domain paramters and sched params
- * -d [domid] : List domain params for domain
+ * -d [domid] : List default domain params for domain
* -d [domid] [params] : Set domain params for domain
+ * -d [domid] -v [vcpuid 1] -v [vcpuid 2] ... :
+ * List per-VCPU params for domain
+ * -d [domid] -v all : List all per-VCPU params for domain
+ * -v all : List all per-VCPU params for all domains
+ * -d [domid] -v [vcpuid 1] [params] -v [vcpuid 2] [params] ... :
+ * Set per-VCPU params for domain
+ * -d [domid] -v all [params] : Set all per-VCPU params for domain
*/
int main_sched_rtds(int argc, char **argv)
{
const char *dom = NULL;
const char *cpupool = NULL;
- int period = 0; /* period is in microsecond */
- int budget = 0; /* budget is in microsecond */
+ int *vcpus = (int *)xmalloc(sizeof(int)); /* IDs of VCPUs that change */
+ int *periods = (int *)xmalloc(sizeof(int)); /* period is in microsecond */
+ int *budgets = (int *)xmalloc(sizeof(int)); /* budget is in microsecond */
+ int v_size = 1; /* size of vcpus array */
+ int p_size = 1; /* size of periods array */
+ int b_size = 1; /* size of budgets array */
+ int v_index = 0; /* index in vcpus array */
+ int p_index =0; /* index in periods array */
+ int b_index =0; /* index for in budgets array */
bool opt_p = false;
bool opt_b = false;
- int opt, rc;
+ bool opt_v = false;
+ bool opt_all = false; /* output per-dom parameters */
+ int opt, i, rc;
static struct option opts[] = {
{"domain", 1, 0, 'd'},
{"period", 1, 0, 'p'},
{"budget", 1, 0, 'b'},
+ {"vcpuid",1, 0, 'v'},
{"cpupool", 1, 0, 'c'},
COMMON_LONG_OPTS
};
- SWITCH_FOREACH_OPT(opt, "d:p:b:c:", opts, "sched-rtds", 0) {
+ SWITCH_FOREACH_OPT(opt, "d:p:b:v:c", opts, "sched-rtds", 0) {
case 'd':
dom = optarg;
break;
case 'p':
- period = strtol(optarg, NULL, 10);
+ if (p_index >= p_size) {
+ /* periods array is full
+ * double the array size for new elements
+ */
+ p_size *= 2;
+ periods = xrealloc(periods, p_size);
+ }
+ periods[p_index++] = strtol(optarg, NULL, 10);
opt_p = 1;
break;
case 'b':
- budget = strtol(optarg, NULL, 10);
+ if (b_index >= b_size) { /* budgets array is full */
+ b_size *= 2;
+ budgets = xrealloc(budgets, b_size);
+ }
+ budgets[b_index++] = strtol(optarg, NULL, 10);
opt_b = 1;
break;
+ case 'v':
+ if (!strcmp(optarg, "all")) { /* get or set all vcpus of a domain */
+ opt_all = 1;
+ break;
+ }
+ if (v_index >= v_size) { /* vcpus array is full */
+ v_size *= 2;
+ vcpus = xrealloc(vcpus, v_size);
+ }
+ vcpus[v_index++] = strtol(optarg, NULL, 10);
+ opt_v = 1;
+ break;
case 'c':
cpupool = optarg;
break;
}
- if (cpupool && (dom || opt_p || opt_b)) {
+ if (cpupool && (dom || opt_p || opt_b || opt_v || opt_all)) {
fprintf(stderr, "Specifying a cpupool is not allowed with "
"other options.\n");
- return EXIT_FAILURE;
+ rc = EXIT_FAILURE;
+ goto out;
}
- if (!dom && (opt_p || opt_b)) {
- fprintf(stderr, "Must specify a domain.\n");
- return EXIT_FAILURE;
+ if (!dom && (opt_p || opt_b || opt_v)) {
+ fprintf(stderr, "Missing parameters.\n");
+ rc = EXIT_FAILURE;
+ goto out;
}
- if (opt_p != opt_b) {
- fprintf(stderr, "Must specify period and budget\n");
- return EXIT_FAILURE;
+ if (dom && !opt_v && !opt_all && (opt_p || opt_b)) {
+ fprintf(stderr, "Must specify VCPU.\n");
+ rc = EXIT_FAILURE;
+ goto out;
+ }
+ if (opt_v && opt_all) {
+ fprintf(stderr, "Incorrect VCPU IDs.\n");
+ rc = EXIT_FAILURE;
+ goto out;
+ }
+ if (((v_index > b_index) && opt_b) || ((v_index > p_index) && opt_p)
+ || p_index != b_index) {
+ fprintf(stderr, "Incorrect number of period and budget\n");
+ rc = EXIT_FAILURE;
+ goto out;
}
- if (!dom) { /* list all domain's rt scheduler info */
- if (sched_domain_output(LIBXL_SCHEDULER_RTDS,
- sched_rtds_domain_output,
+ if ((!dom) && opt_all) {
+ /* get all domain's per-vcpu rtds scheduler parameters */
+ rc = -sched_vcpu_output(LIBXL_SCHEDULER_RTDS,
+ sched_rtds_vcpu_output,
sched_rtds_pool_output,
- cpupool))
- return EXIT_FAILURE;
+ cpupool);
+ goto out;
+ } else if (!dom && !opt_all) {
+ /* list all domain's default scheduling parameters */
+ rc = -sched_domain_output(LIBXL_SCHEDULER_RTDS,
+ sched_rtds_domain_output,
+ sched_rtds_pool_output,
+ cpupool);
+ goto out;
} else {
uint32_t domid = find_domain(dom);
- if (!opt_p && !opt_b) { /* output rt scheduler info */
+ if (!opt_v && !opt_all) { /* output default scheduling parameters */
sched_rtds_domain_output(-1);
- if (sched_rtds_domain_output(domid))
- return EXIT_FAILURE;
- } else { /* set rt scheduler paramaters */
- libxl_domain_sched_params scinfo;
- libxl_domain_sched_params_init(&scinfo);
+ rc = -sched_rtds_domain_output(domid);
+ goto out;
+ } else if (!opt_p && !opt_b) {
+ /* get per-vcpu rtds scheduling parameters */
+ libxl_vcpu_sched_params scinfo;
+ libxl_vcpu_sched_params_init(&scinfo);
+ sched_rtds_vcpu_output(-1, &scinfo);
+ scinfo.num_vcpus = v_index;
+ if (v_index > 0)
+ scinfo.vcpus = (libxl_sched_params *)
+ xmalloc(sizeof(libxl_sched_params) * (v_index));
+ for (i = 0; i < v_index; i++)
+ scinfo.vcpus[i].vcpuid = vcpus[i];
+ rc = -sched_rtds_vcpu_output(domid, &scinfo);
+ libxl_vcpu_sched_params_dispose(&scinfo);
+ goto out;
+ } else if (opt_v || opt_all) {
+ /* set per-vcpu rtds scheduling parameters */
+ libxl_vcpu_sched_params scinfo;
+ libxl_vcpu_sched_params_init(&scinfo);
scinfo.sched = LIBXL_SCHEDULER_RTDS;
- scinfo.period = period;
- scinfo.budget = budget;
+ if (v_index > 0) {
+ scinfo.num_vcpus = v_index;
+ scinfo.vcpus = (libxl_sched_params *)
+ xmalloc(sizeof(libxl_sched_params) * (v_index));
+ for (i = 0; i < v_index; i++) {
+ scinfo.vcpus[i].vcpuid = vcpus[i];
+ scinfo.vcpus[i].period = periods[i];
+ scinfo.vcpus[i].budget = budgets[i];
+ }
+ rc = sched_vcpu_set(domid, &scinfo);
+ } else { /* set params for all vcpus */
+ scinfo.num_vcpus = 1;
+ scinfo.vcpus = (libxl_sched_params *)
+ xmalloc(sizeof(libxl_sched_params));
+ scinfo.vcpus[0].period = periods[0];
+ scinfo.vcpus[0].budget = budgets[0];
+ rc = sched_vcpu_set_all(domid, &scinfo);
+ }
- rc = sched_domain_set(domid, &scinfo);
- libxl_domain_sched_params_dispose(&scinfo);
- if (rc)
- return EXIT_FAILURE;
+ libxl_vcpu_sched_params_dispose(&scinfo);
+ if (rc) {
+ rc = -rc;
+ goto out;
+ }
}
}
- return EXIT_SUCCESS;
+ rc = EXIT_SUCCESS;
+out:
+ free(vcpus);
+ free(periods);
+ free(budgets);
+ return rc;
}
int main_domid(int argc, char **argv)
diff --git a/tools/libxl/xl_cmdtable.c b/tools/libxl/xl_cmdtable.c
index fdc1ac6..9662bda 100644
--- a/tools/libxl/xl_cmdtable.c
+++ b/tools/libxl/xl_cmdtable.c
@@ -268,8 +268,10 @@ struct cmd_spec cmd_table[] = {
{ "sched-rtds",
&main_sched_rtds, 0, 1,
"Get/set rtds scheduler parameters",
- "[-d <Domain> [-p[=PERIOD]] [-b[=BUDGET]]]",
+ "[-d <Domain> [-v[=VCPUID/all]] [-p[=PERIOD]] [-b[=BUDGET]]]",
"-d DOMAIN, --domain=DOMAIN Domain to modify\n"
+ "-v VCPUID/all, --vcpuid=VCPUID/all VCPU to modify or output;\n"
+ " Using '-v all' to modify/output all vcpus\n"
"-p PERIOD, --period=PERIOD Period (us)\n"
"-b BUDGET, --budget=BUDGET Budget (us)\n"
},
--
1.9.1
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