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multifd: Add multifd-zlib-level parameter

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This parameter specifies the zlib compression level. The next patch
will put it to use.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Juan Quintela 2020-01-23 17:08:52 +01:00
parent ab7cbb0b9a
commit 9004db48c0
4 changed files with 56 additions and 3 deletions
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24
migration/migration.c
View file

@ -89,6 +89,8 @@
#define DEFAULT_MIGRATE_X_CHECKPOINT_DELAY (200 * 100)
#define DEFAULT_MIGRATE_MULTIFD_CHANNELS 2
#define DEFAULT_MIGRATE_MULTIFD_COMPRESSION MULTIFD_COMPRESSION_NONE
/* 0: means nocompress, 1: best speed, ... 9: best compress ratio */
#define DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL 1
/* Background transfer rate for postcopy, 0 means unlimited, note
* that page requests can still exceed this limit.
@ -801,6 +803,8 @@ MigrationParameters *qmp_query_migrate_parameters(Error **errp)
params->multifd_channels = s->parameters.multifd_channels;
params->has_multifd_compression = true;
params->multifd_compression = s->parameters.multifd_compression;
params->has_multifd_zlib_level = true;
params->multifd_zlib_level = s->parameters.multifd_zlib_level;
params->has_xbzrle_cache_size = true;
params->xbzrle_cache_size = s->parameters.xbzrle_cache_size;
params->has_max_postcopy_bandwidth = true;
@ -1208,6 +1212,13 @@ static bool migrate_params_check(MigrationParameters *params, Error **errp)
return false;
}
if (params->has_multifd_zlib_level &&
(params->multifd_zlib_level > 9)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zlib_level",
"is invalid, it should be in the range of 0 to 9");
return false;
}
if (params->has_xbzrle_cache_size &&
(params->xbzrle_cache_size < qemu_target_page_size() ||
!is_power_of_2(params->xbzrle_cache_size))) {
@ -2254,6 +2265,15 @@ MultiFDCompression migrate_multifd_compression(void)
return s->parameters.multifd_compression;
}
int migrate_multifd_zlib_level(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.multifd_zlib_level;
}
int migrate_use_xbzrle(void)
{
MigrationState *s;
@ -3544,6 +3564,9 @@ static Property migration_properties[] = {
DEFINE_PROP_MULTIFD_COMPRESSION("multifd-compression", MigrationState,
parameters.multifd_compression,
DEFAULT_MIGRATE_MULTIFD_COMPRESSION),
DEFINE_PROP_UINT8("multifd-zlib-level", MigrationState,
parameters.multifd_zlib_level,
DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL),
DEFINE_PROP_SIZE("xbzrle-cache-size", MigrationState,
parameters.xbzrle_cache_size,
DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE),
@ -3635,6 +3658,7 @@ static void migration_instance_init(Object *obj)
params->has_block_incremental = true;
params->has_multifd_channels = true;
params->has_multifd_compression = true;
params->has_multifd_zlib_level = true;
params->has_xbzrle_cache_size = true;
params->has_max_postcopy_bandwidth = true;
params->has_max_cpu_throttle = true;