From 9e1ba4cc4e2536d9650e84e2614c5691ed45938f Mon Sep 17 00:00:00 2001 From: Orit Wasserman Date: Mon, 6 Aug 2012 21:42:54 +0300 Subject: Add migrate_set_cache_size command Change XBZRLE cache size in bytes (the size should be a power of 2, it will be rounded down to the nearest power of 2). If XBZRLE cache size is too small there will be many cache miss. New query-migrate-cache-size QMP command and 'info migrate_cache_size' HMP command to query cache value. Signed-off-by: Benoit Hudzia Signed-off-by: Petter Svard Signed-off-by: Aidan Shribman Signed-off-by: Orit Wasserman Reviewed-by: Luiz Capitulino Reviewed-by: Eric Blake --- hmp-commands.hx | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'hmp-commands.hx') diff --git a/hmp-commands.hx b/hmp-commands.hx index 476b3cda2e..f6104b099f 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -829,6 +829,26 @@ STEXI @item migrate_cancel @findex migrate_cancel Cancel the current VM migration. + +ETEXI + + { + .name = "migrate_set_cache_size", + .args_type = "value:o", + .params = "value", + .help = "set cache size (in bytes) for XBZRLE migrations," + "the cache size will be rounded down to the nearest " + "power of 2.\n" + "The cache size affects the number of cache misses." + "In case of a high cache miss ratio you need to increase" + " the cache size", + .mhandler.cmd = hmp_migrate_set_cache_size, + }, + +STEXI +@item migrate_set_cache_size @var{value} +@findex migrate_set_cache_size +Set cache size to @var{value} (in bytes) for xbzrle migrations. ETEXI { @@ -1433,6 +1453,8 @@ show user network stack connection states show migration status @item info migrate_capabilities show current migration capabilities +@item info migrate_cache_size +show current migration XBZRLE cache size @item info balloon show balloon information @item info qtree -- cgit v1.2.3