Signed-off-by: Benoit Hudzia <benoit.hud...@sap.com>
Signed-off-by: Petter Svard <pett...@cs.umu.se>
Signed-off-by: Aidan Shribman <aidan.shrib...@sap.com>
Signed-off-by: Orit Wasserman <owass...@redhat.com>
Signed-off-by: Juan Quintela <quint...@redhat.com>
---
arch_init.c | 28 ++++++++++++++++++++++++++++
hmp.c | 13 +++++++++++++
migration.c | 17 +++++++++++++++++
migration.h | 4 ++++
qapi-schema.json | 28 +++++++++++++++++++++++++++-
qmp-commands.hx | 32 +++++++++++++++++++++++++++++++-
6 files changed, 120 insertions(+), 2 deletions(-)
diff --git a/arch_init.c b/arch_init.c
index 7f12317..9833d54 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -203,7 +203,11 @@ int64_t xbzrle_cache_resize(int64_t new_size)
typedef struct AccountingInfo {
uint64_t dup_pages;
uint64_t norm_pages;
+ uint64_t xbzrle_bytes;
+ uint64_t xbzrle_pages;
+ uint64_t xbzrle_cache_miss;
uint64_t iterations;
+ uint64_t xbzrle_overflows;
} AccountingInfo;
static AccountingInfo acct_info;
@@ -233,6 +237,26 @@ uint64_t norm_mig_pages_transferred(void)
return acct_info.norm_pages;
}
+uint64_t xbzrle_mig_bytes_transferred(void)
+{
+ return acct_info.xbzrle_bytes;
+}
+
+uint64_t xbzrle_mig_pages_transferred(void)
+{
+ return acct_info.xbzrle_pages;
+}
+
+uint64_t xbzrle_mig_pages_cache_miss(void)
+{
+ return acct_info.xbzrle_cache_miss;
+}
+
+uint64_t xbzrle_mig_pages_overflow(void)
+{
+ return acct_info.xbzrle_overflows;
+}
+
static void save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset,
int cont, int flag)
{
@@ -257,6 +281,7 @@ static int save_xbzrle_page(QEMUFile *f, uint8_t
*current_data,
if (!cache_is_cached(XBZRLE.cache, current_addr)) {
cache_insert(XBZRLE.cache, current_addr,
g_memdup(current_data, TARGET_PAGE_SIZE));
+ acct_info.xbzrle_cache_miss++;
return -1;
}
@@ -274,6 +299,7 @@ static int save_xbzrle_page(QEMUFile *f, uint8_t
*current_data,
return 0;
} else if (encoded_len == -1) {
DPRINTF("Overflow\n");
+ acct_info.xbzrle_overflows++;
/* update data in the cache */
memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE);
return -1;
@@ -288,6 +314,8 @@ static int save_xbzrle_page(QEMUFile *f, uint8_t
*current_data,
qemu_put_be16(f, encoded_len);
qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len);
bytes_sent = encoded_len + 1 + 2;
+ acct_info.xbzrle_pages++;
+ acct_info.xbzrle_bytes += bytes_sent;
return bytes_sent;
}
diff --git a/hmp.c b/hmp.c
index f19a63b..9b77c44 100644
--- a/hmp.c
+++ b/hmp.c
@@ -177,6 +177,19 @@ void hmp_info_migrate(Monitor *mon)
info->disk->total >> 10);
}
+ if (info->has_xbzrle_cache) {
+ monitor_printf(mon, "cache size: %" PRIu64 " bytes\n",
+ info->xbzrle_cache->cache_size);
+ monitor_printf(mon, "xbzrle transferred: %" PRIu64 " kbytes\n",
+ info->xbzrle_cache->bytes >> 10);
+ monitor_printf(mon, "xbzrle pages: %" PRIu64 " pages\n",
+ info->xbzrle_cache->pages);
+ monitor_printf(mon, "xbzrle cache miss: %" PRIu64 "\n",
+ info->xbzrle_cache->cache_miss);
+ monitor_printf(mon, "xbzrle overflow : %" PRIu64 "\n",
+ info->xbzrle_cache->overflow);
+ }
+
qapi_free_MigrationInfo(info);
qapi_free_MigrationCapabilityStatusList(caps);
}
diff --git a/migration.c b/migration.c
index fef06b3..4874a2c 100644
--- a/migration.c
+++ b/migration.c
@@ -141,6 +141,19 @@ MigrationCapabilityStatusList
*qmp_query_migrate_capabilities(Error **errp)
return head;
}
+static void get_xbzrle_cache_stats(MigrationInfo *info)
+{
+ if (migrate_use_xbzrle()) {
+ info->has_xbzrle_cache = true;
+ info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache));
+ info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size();
+ info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred();
+ info->xbzrle_cache->pages = xbzrle_mig_pages_transferred();
+ info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss();
+ info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow();
+ }
+}
+
MigrationInfo *qmp_query_migrate(Error **errp)
{
MigrationInfo *info = g_malloc0(sizeof(*info));
@@ -172,8 +185,12 @@ MigrationInfo *qmp_query_migrate(Error **errp)
info->disk->remaining = blk_mig_bytes_remaining();
info->disk->total = blk_mig_bytes_total();
}
+
+ get_xbzrle_cache_stats(info);
break;
case MIG_STATE_COMPLETED:
+ get_xbzrle_cache_stats(info);
+
info->has_status = true;
info->status = g_strdup("completed");
diff --git a/migration.h b/migration.h
index e4a7cd7..a9852fc 100644
--- a/migration.h
+++ b/migration.h
@@ -91,6 +91,10 @@ uint64_t dup_mig_bytes_transferred(void);
uint64_t dup_mig_pages_transferred(void);
uint64_t norm_mig_bytes_transferred(void);
uint64_t norm_mig_pages_transferred(void);
+uint64_t xbzrle_mig_bytes_transferred(void);
+uint64_t xbzrle_mig_pages_transferred(void);
+uint64_t xbzrle_mig_pages_overflow(void);
+uint64_t xbzrle_mig_pages_cache_miss(void);
/**
* @migrate_add_blocker - prevent migration from proceeding
diff --git a/qapi-schema.json b/qapi-schema.json
index e0832ea..1a7f0c9 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -278,6 +278,27 @@
'normal-bytes': 'int' } }
##
+# @XBZRLECacheStats
+#
+# Detailed XBZRLE migration cache statistics
+#
+# @cache-size: XBZRLE cache size
+#
+# @bytes: amount of bytes already transferred to the target VM
+#
+# @pages: amount of pages transferred to the target VM
+#
+# @cache-miss: number of cache miss
+#
+# @overflow: number of overflows
+#
+# Since: 1.2
+##
+{ 'type': 'XBZRLECacheStats',
+ 'data': {'cache-size': 'int', 'bytes': 'int', 'pages': 'int',
+ 'cache-miss': 'int', 'overflow': 'int' } }
+
+##
# @MigrationInfo
#
# Information about current migration process.
@@ -295,11 +316,16 @@
# status, only returned if status is 'active' and it is a block
# migration
#
+# @xbzrle-cache: #optional @XBZRLECacheStats containing detailed XBZRLE
+# migration statistics, only returned if XBZRLE feature is on
and
+# status is 'active' or 'completed' (since 1.2)
+#
# Since: 0.14.0
##
{ 'type': 'MigrationInfo',
'data': {'*status': 'str', '*ram': 'MigrationStats',
- '*disk': 'MigrationStats'} }
+ '*disk': 'MigrationStats',
+ '*xbzrle-cache': 'XBZRLECacheStats'} }
##
# @query-migrate
diff --git a/qmp-commands.hx b/qmp-commands.hx
index f7ae7e6..cb6cac8 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -2128,7 +2128,13 @@ The main json-object contains the following:
- "transferred": amount transferred (json-int)
- "remaining": amount remaining (json-int)
- "total": total (json-int)
-
+- "xbzrle-cache": only present if XBZRLE is active.
+ It is a json-object with the following XBZRLE information:
+ - "cache-size": XBZRLE cache size
+ - "bytes": total XBZRLE bytes transferred
+ - "pages": number of XBZRLE compressed pages
+ - "cache-miss": number of cache misses
+ - "overflow": number of XBZRLE overflows
Examples:
1. Before the first migration
@@ -2196,6 +2202,30 @@ Examples:
}
}
+6. Migration is being performed and XBZRLE is active:
+
+-> { "execute": "query-migrate" }
+<- {
+ "return":{
+ "status":"active",
+ "capabilities" : [ { "capability": "xbzrle", "state" : true } ],
+ "ram":{
+ "total":1057024,
+ "remaining":1053304,
+ "transferred":3720,
+ "duplicate": 10,
+ "normal": 3333
+ },
+ "xbzrle-cache":{
+ "cache-size": 1024,
+ "transferred":20971520,
+ "pages":2444343,
+ "cache-miss":2244,
+ "overflow":34434
+ }
+ }
+ }
+
EQMP
{
--
1.7.7.6
