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migration: Parameters for auto-converge cpu throttling

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Add migration parameters to allow the user to adjust the parameters
that control cpu throttling when auto-converge is in effect. The added
parameters are as follows:

x-cpu-throttle-initial : Initial percantage of time guest cpus are throttled
when migration auto-converge is activated.

x-cpu-throttle-increment: throttle percantage increase each time
auto-converge detects that migration is not making progress.

Signed-off-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Jason J. Herne 2015-09-08 13:12:34 -04:00 committed by Juan Quintela
parent 2adcc85d40
commit 1626fee3bd
3 changed files with 91 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
hmp.c
View file

@ -272,6 +272,12 @@ void hmp_info_migrate_parameters(Monitor *mon, const QDict *qdict)
monitor_printf(mon, " %s: %" PRId64,
MigrationParameter_lookup[MIGRATION_PARAMETER_DECOMPRESS_THREADS],
params->decompress_threads);
monitor_printf(mon, " %s: %" PRId64,
MigrationParameter_lookup[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL],
params->x_cpu_throttle_initial);
monitor_printf(mon, " %s: %" PRId64,
MigrationParameter_lookup[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT],
params->x_cpu_throttle_increment);
monitor_printf(mon, "\n");
}
@ -1221,6 +1227,8 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict)
bool has_compress_level = false;
bool has_compress_threads = false;
bool has_decompress_threads = false;
bool has_x_cpu_throttle_initial = false;
bool has_x_cpu_throttle_increment = false;
int i;
for (i = 0; i < MIGRATION_PARAMETER_MAX; i++) {
@ -1235,10 +1243,18 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict)
case MIGRATION_PARAMETER_DECOMPRESS_THREADS:
has_decompress_threads = true;
break;
case MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL:
has_x_cpu_throttle_initial = true;
break;
case MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT:
has_x_cpu_throttle_increment = true;
break;
}
qmp_migrate_set_parameters(has_compress_level, value,
has_compress_threads, value,
has_decompress_threads, value,
has_x_cpu_throttle_initial, value,
has_x_cpu_throttle_increment, value,
&err);
break;
}

46
migration/migration.c
View file

@ -44,6 +44,9 @@
#define DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT 2
/*0: means nocompress, 1: best speed, ... 9: best compress ratio */
#define DEFAULT_MIGRATE_COMPRESS_LEVEL 1
/* Define default autoconverge cpu throttle migration parameters */
#define DEFAULT_MIGRATE_X_CPU_THROTTLE_INITIAL 20
#define DEFAULT_MIGRATE_X_CPU_THROTTLE_INCREMENT 10
/* Migration XBZRLE default cache size */
#define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024)
@ -71,6 +74,10 @@ MigrationState *migrate_get_current(void)
DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT,
.parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] =
DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT,
.parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL] =
DEFAULT_MIGRATE_X_CPU_THROTTLE_INITIAL,
.parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT] =
DEFAULT_MIGRATE_X_CPU_THROTTLE_INCREMENT,
};
return &current_migration;
@ -372,6 +379,10 @@ MigrationParameters *qmp_query_migrate_parameters(Error **errp)
s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS];
params->decompress_threads =
s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS];
params->x_cpu_throttle_initial =
s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL];
params->x_cpu_throttle_increment =
s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT];
return params;
}
@ -494,7 +505,11 @@ void qmp_migrate_set_parameters(bool has_compress_level,
bool has_compress_threads,
int64_t compress_threads,
bool has_decompress_threads,
int64_t decompress_threads, Error **errp)
int64_t decompress_threads,
bool has_x_cpu_throttle_initial,
int64_t x_cpu_throttle_initial,
bool has_x_cpu_throttle_increment,
int64_t x_cpu_throttle_increment, Error **errp)
{
MigrationState *s = migrate_get_current();
@ -517,6 +532,18 @@ void qmp_migrate_set_parameters(bool has_compress_level,
"is invalid, it should be in the range of 1 to 255");
return;
}
if (has_x_cpu_throttle_initial &&
(x_cpu_throttle_initial < 1 || x_cpu_throttle_initial > 99)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"x_cpu_throttle_initial",
"an integer in the range of 1 to 99");
}
if (has_x_cpu_throttle_increment &&
(x_cpu_throttle_increment < 1 || x_cpu_throttle_increment > 99)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"x_cpu_throttle_increment",
"an integer in the range of 1 to 99");
}
if (has_compress_level) {
s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level;
@ -528,6 +555,15 @@ void qmp_migrate_set_parameters(bool has_compress_level,
s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] =
decompress_threads;
}
if (has_x_cpu_throttle_initial) {
s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL] =
x_cpu_throttle_initial;
}
if (has_x_cpu_throttle_increment) {
s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT] =
x_cpu_throttle_increment;
}
}
/* shared migration helpers */
@ -643,6 +679,10 @@ static MigrationState *migrate_init(const MigrationParams *params)
s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS];
int decompress_thread_count =
s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS];
int x_cpu_throttle_initial =
s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL];
int x_cpu_throttle_increment =
s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT];
memcpy(enabled_capabilities, s->enabled_capabilities,
sizeof(enabled_capabilities));
@ -658,6 +698,10 @@ static MigrationState *migrate_init(const MigrationParams *params)
compress_thread_count;
s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] =
decompress_thread_count;
s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL] =
x_cpu_throttle_initial;
s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT] =
x_cpu_throttle_increment;
s->bandwidth_limit = bandwidth_limit;
migrate_set_state(s, MIGRATION_STATUS_NONE, MIGRATION_STATUS_SETUP);

33
qapi-schema.json
View file

@ -596,10 +596,18 @@
# compression, so set the decompress-threads to the number about 1/4
# of compress-threads is adequate.
#
# @x-cpu-throttle-initial: Initial percentage of time guest cpus are throttled
# when migration auto-converge is activated. The
# default value is 20. (Since 2.5)
#
# @x-cpu-throttle-increment: throttle percentage increase each time
# auto-converge detects that migration is not making
# progress. The default value is 10. (Since 2.5)
# Since: 2.4
##
{ 'enum': 'MigrationParameter',
'data': ['compress-level', 'compress-threads', 'decompress-threads'] }
'data': ['compress-level', 'compress-threads', 'decompress-threads',
'x-cpu-throttle-initial', 'x-cpu-throttle-increment'] }
#
# @migrate-set-parameters
@ -612,12 +620,21 @@
#
# @decompress-threads: decompression thread count
#
# @x-cpu-throttle-initial: Initial percentage of time guest cpus are throttled
# when migration auto-converge is activated. The
# default value is 20. (Since 2.5)
#
# @x-cpu-throttle-increment: throttle percentage increase each time
# auto-converge detects that migration is not making
# progress. The default value is 10. (Since 2.5)
# Since: 2.4
##
{ 'command': 'migrate-set-parameters',
'data': { '*compress-level': 'int',
'*compress-threads': 'int',
'*decompress-threads': 'int'} }
'*decompress-threads': 'int',
'*x-cpu-throttle-initial': 'int',
'*x-cpu-throttle-increment': 'int'} }
#
# @MigrationParameters
@ -628,12 +645,22 @@
#
# @decompress-threads: decompression thread count
#
# @x-cpu-throttle-initial: Initial percentage of time guest cpus are throttled
# when migration auto-converge is activated. The
# default value is 20. (Since 2.5)
#
# @x-cpu-throttle-increment: throttle percentage increase each time
# auto-converge detects that migration is not making
# progress. The default value is 10. (Since 2.5)
#
# Since: 2.4
##
{ 'struct': 'MigrationParameters',
'data': { 'compress-level': 'int',
'compress-threads': 'int',
'decompress-threads': 'int'} }
'decompress-threads': 'int',
'x-cpu-throttle-initial': 'int',
'x-cpu-throttle-increment': 'int'} }
##
# @query-migrate-parameters
#