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migration: Use an array instead of 3 parameters

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Put the three parameters related to multiple thread (de)compression
into an int array, and use an enum type to index the parameter.

Signed-off-by: Liang Li <liang.z.li@intel.com>
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Liang Li 2015-03-23 16:32:27 +08:00 committed by Juan Quintela
parent dde4e694ae
commit 43c60a81ba
3 changed files with 43 additions and 15 deletions
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4
include/migration/migration.h
View file

@ -50,9 +50,7 @@ struct MigrationState
QemuThread thread;
QEMUBH *cleanup_bh;
QEMUFile *file;
int compress_thread_count;
int decompress_thread_count;
int compress_level;
int parameters[MIGRATION_PARAMETER_MAX];
int state;
MigrationParams params;

31
migration/migration.c
View file

@ -60,9 +60,12 @@ MigrationState *migrate_get_current(void)
.bandwidth_limit = MAX_THROTTLE,
.xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE,
.mbps = -1,
.compress_thread_count = DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT,
.decompress_thread_count = DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT,
.compress_level = DEFAULT_MIGRATE_COMPRESS_LEVEL,
.parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] =
DEFAULT_MIGRATE_COMPRESS_LEVEL,
.parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] =
DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT,
.parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] =
DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT,
};
return &current_migration;
@ -406,9 +409,11 @@ static MigrationState *migrate_init(const MigrationParams *params)
int64_t bandwidth_limit = s->bandwidth_limit;
bool enabled_capabilities[MIGRATION_CAPABILITY_MAX];
int64_t xbzrle_cache_size = s->xbzrle_cache_size;
int compress_level = s->compress_level;
int compress_thread_count = s->compress_thread_count;
int decompress_thread_count = s->decompress_thread_count;
int compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL];
int compress_thread_count =
s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS];
int decompress_thread_count =
s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS];
memcpy(enabled_capabilities, s->enabled_capabilities,
sizeof(enabled_capabilities));
@ -419,9 +424,11 @@ static MigrationState *migrate_init(const MigrationParams *params)
sizeof(enabled_capabilities));
s->xbzrle_cache_size = xbzrle_cache_size;
s->compress_level = compress_level;
s->compress_thread_count = compress_thread_count;
s->decompress_thread_count = decompress_thread_count;
s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level;
s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] =
compress_thread_count;
s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] =
decompress_thread_count;
s->bandwidth_limit = bandwidth_limit;
s->state = MIGRATION_STATUS_SETUP;
trace_migrate_set_state(MIGRATION_STATUS_SETUP);
@ -624,7 +631,7 @@ int migrate_compress_level(void)
s = migrate_get_current();
return s->compress_level;
return s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL];
}
int migrate_compress_threads(void)
@ -633,7 +640,7 @@ int migrate_compress_threads(void)
s = migrate_get_current();
return s->compress_thread_count;
return s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS];
}
int migrate_decompress_threads(void)
@ -642,7 +649,7 @@ int migrate_decompress_threads(void)
s = migrate_get_current();
return s->decompress_thread_count;
return s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS];
}
int migrate_use_xbzrle(void)

23
qapi-schema.json
View file

@ -569,6 +569,29 @@
##
{ 'command': 'query-migrate-capabilities', 'returns': ['MigrationCapabilityStatus']}
# @MigrationParameter
#
# Migration parameters enumeration
#
# @compress-level: Set the compression level to be used in live migration,
# the compression level is an integer between 0 and 9, where 0 means
# no compression, 1 means the best compression speed, and 9 means best
# compression ratio which will consume more CPU.
#
# @compress-threads: Set compression thread count to be used in live migration,
# the compression thread count is an integer between 1 and 255.
#
# @decompress-threads: Set decompression thread count to be used in live
# migration, the decompression thread count is an integer between 1
# and 255. Usually, decompression is at least 4 times as fast as
# compression, so set the decompress-threads to the number about 1/4
# of compress-threads is adequate.
#
# Since: 2.4
##
{ 'enum': 'MigrationParameter',
'data': ['compress-level', 'compress-threads', 'decompress-threads'] }
##
# @MouseInfo:
#