From: Orit Wasserman <owass...@redhat.com>
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 | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
hmp.c | 13 +++++++++++
migration.c | 49 ++++++++++++++++++++++++++++++++++++++++
migration.h | 9 ++++++++
qapi-schema.json | 37 +++++++++++++++++++++++++-----
qmp-commands.hx | 35 ++++++++++++++++++++++++++++-
6 files changed, 203 insertions(+), 6 deletions(-)
diff --git a/arch_init.c b/arch_init.c
index d972d84..ab3fb2c 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -202,6 +202,64 @@ int64_t xbzrle_cache_resize(int64_t new_size)
return pow2floor(new_size);
}
+/* accounting for migration statistics */
+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;
+
+static void acct_clear(void)
+{
+ memset(&acct_info, 0, sizeof(acct_info));
+}
+
+uint64_t dup_mig_bytes_transferred(void)
+{
+ return acct_info.dup_pages * TARGET_PAGE_SIZE;
+}
+
+uint64_t dup_mig_pages_transferred(void)
+{
+ return acct_info.dup_pages;
+}
+
+uint64_t norm_mig_bytes_transferred(void)
+{
+ return acct_info.norm_pages * TARGET_PAGE_SIZE;
+}
+
+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)
{
@@ -230,6 +288,7 @@ 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;
}
@@ -244,6 +303,7 @@ 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;
@@ -263,7 +323,9 @@ static int save_xbzrle_page(QEMUFile *f, uint8_t
*current_data,
qemu_put_byte(f, hdr.xh_flags);
qemu_put_be16(f, hdr.xh_len);
qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len);
+ acct_info.xbzrle_pages++;
bytes_sent = encoded_len + sizeof(hdr);
+ acct_info.xbzrle_bytes += bytes_sent;
return bytes_sent;
}
@@ -303,6 +365,7 @@ static int ram_save_block(QEMUFile *f)
p = memory_region_get_ram_ptr(mr) + offset;
if (is_dup_page(p)) {
+ acct_info.dup_pages++;
save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_COMPRESS);
qemu_put_byte(f, *p);
bytes_sent = 1;
@@ -318,6 +381,7 @@ static int ram_save_block(QEMUFile *f)
save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
bytes_sent = TARGET_PAGE_SIZE;
+ acct_info.norm_pages++;
}
/* if page is unmodified, continue to the next */
@@ -437,6 +501,7 @@ static int ram_save_setup(QEMUFile *f, void *opaque)
return -1;
}
XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
+ acct_clear();
}
QLIST_FOREACH(block, &ram_list.blocks, next) {
@@ -484,6 +549,7 @@ static int ram_save_iterate(QEMUFile *f, void *opaque)
break;
}
bytes_transferred += bytes_sent;
+ acct_info.iterations++;
/* we want to check in the 1st loop, just in case it was the 1st time
and we had to sync the dirty bitmap.
qemu_get_clock_ns() is a bit expensive, so we only check each some
diff --git a/hmp.c b/hmp.c
index 99ad00a..0d7333b 100644
--- a/hmp.c
+++ b/hmp.c
@@ -168,6 +168,19 @@ void hmp_info_migrate(Monitor *mon)
info->disk->total >> 10);
}
+ if (info->has_cache) {
+ monitor_printf(mon, "cache size: %" PRIu64 " bytes\n",
+ info->cache->cache_size);
+ monitor_printf(mon, "xbzrle transferred: %" PRIu64 " kbytes\n",
+ info->cache->xbzrle_bytes >> 10);
+ monitor_printf(mon, "xbzrle pages: %" PRIu64 " pages\n",
+ info->cache->xbzrle_pages);
+ monitor_printf(mon, "xbzrle cache miss: %" PRIu64 "\n",
+ info->cache->xbzrle_cache_miss);
+ monitor_printf(mon, "xbzrle overflow : %" PRIu64 "\n",
+ info->cache->xbzrle_overflow);
+ }
+
qapi_free_MigrationInfo(info);
}
diff --git a/migration.c b/migration.c
index d134bf6..e11f451 100644
--- a/migration.c
+++ b/migration.c
@@ -137,6 +137,17 @@ MigrationInfo *qmp_query_migrate(Error **errp)
info->capabilities->value->state = s->enabled_capabilities[i];
info->capabilities->next = NULL;
}
+
+ /* display xbzrle cache size */
+ if (migrate_use_xbzrle()) {
+ info->has_cache = true;
+ info->cache = g_malloc0(sizeof(*info->cache));
+ info->cache->cache_size = migrate_xbzrle_cache_size();
+ info->cache->xbzrle_bytes = xbzrle_mig_bytes_transferred();
+ info->cache->xbzrle_pages = xbzrle_mig_pages_transferred();
+ info->cache->xbzrle_cache_miss = xbzrle_mig_pages_cache_miss();
+ info->cache->xbzrle_overflow = xbzrle_mig_pages_overflow();
+ }
break;
case MIG_STATE_ACTIVE:
for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) {
@@ -161,6 +172,8 @@ MigrationInfo *qmp_query_migrate(Error **errp)
info->ram->total = ram_bytes_total();
info->ram->total_time = qemu_get_clock_ms(rt_clock)
- s->total_time;
+ info->ram->duplicate = dup_mig_pages_transferred();
+ info->ram->normal = norm_mig_pages_transferred();
if (blk_mig_active()) {
info->has_disk = true;
@@ -169,6 +182,16 @@ MigrationInfo *qmp_query_migrate(Error **errp)
info->disk->remaining = blk_mig_bytes_remaining();
info->disk->total = blk_mig_bytes_total();
}
+
+ if (migrate_use_xbzrle()) {
+ info->has_cache = true;
+ info->cache = g_malloc0(sizeof(*info->cache));
+ info->cache->cache_size = migrate_xbzrle_cache_size();
+ info->cache->xbzrle_bytes = xbzrle_mig_bytes_transferred();
+ info->cache->xbzrle_pages = xbzrle_mig_pages_transferred();
+ info->cache->xbzrle_cache_miss = xbzrle_mig_pages_cache_miss();
+ info->cache->xbzrle_overflow = xbzrle_mig_pages_overflow();
+ }
break;
case MIG_STATE_COMPLETED:
for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) {
@@ -183,6 +206,32 @@ MigrationInfo *qmp_query_migrate(Error **errp)
info->capabilities->next = NULL;
}
+ info->has_ram = true;
+ info->ram = g_malloc0(sizeof(*info->ram));
+ info->ram->transferred = ram_bytes_transferred();
+ info->ram->remaining = ram_bytes_remaining();
+ info->ram->total = ram_bytes_total();
+ info->ram->duplicate = dup_mig_pages_transferred();
+ info->ram->normal = norm_mig_pages_transferred();
+
+ if (blk_mig_active()) {
+ info->has_disk = true;
+ info->disk = g_malloc0(sizeof(*info->disk));
+ info->disk->transferred = blk_mig_bytes_transferred();
+ info->disk->remaining = blk_mig_bytes_remaining();
+ info->disk->total = blk_mig_bytes_total();
+ }
+
+ if (migrate_use_xbzrle()) {
+ info->has_cache = true;
+ info->cache = g_malloc0(sizeof(*info->cache));
+ info->cache->cache_size = migrate_xbzrle_cache_size();
+ info->cache->xbzrle_bytes = xbzrle_mig_bytes_transferred();
+ info->cache->xbzrle_pages = xbzrle_mig_pages_transferred();
+ info->cache->xbzrle_cache_miss = xbzrle_mig_pages_cache_miss();
+ info->cache->xbzrle_overflow = xbzrle_mig_pages_overflow();
+ }
+
info->has_status = true;
info->status = g_strdup("completed");
diff --git a/migration.h b/migration.h
index 337e225..a9852fc 100644
--- a/migration.h
+++ b/migration.h
@@ -87,6 +87,15 @@ uint64_t ram_bytes_total(void);
extern SaveVMHandlers savevm_ram_handlers;
+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 a0f0f95..961810b 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -264,11 +264,35 @@
# migration has ended, it returns the total migration
# time. (since 1.2)
#
-# Since: 0.14.0.
+# @duplicate: #optional, number of duplicate pages
+#
+# @normal : #optional, number of normal pages
+#
+# Since: 0.14.0, 'duplicate' and 'normal' since 1.2
##
{ 'type': 'MigrationStats',
'data': {'transferred': 'int', 'remaining': 'int', 'total': 'int' ,
- 'total_time': 'int' } }
+ 'total_time': 'int', '*duplicate': 'int', '*normal': 'int' } }
+##
+# @CacheStats
+#
+# Detailed XBZRLE migration cache statistics
+#
+# @cache_size: XBZRLE cache size
+#
+# @xbzrle_bytes: amount of bytes already transferred to the target VM
+#
+# @xbzrle_pages: amount of pages transferred to the target VM
+#
+# @xbzrle_cache_miss: number of cache miss
+#
+# @xbzrle_overflow: number of overflows
+#
+# Since: 1.2
+##
+{ 'type': 'CacheStats',
+ 'data': {'cache-size': 'int', 'xbzrle-bytes': 'int', 'xbzrle-pages': 'int',
+ 'xbzrle-cache-miss': 'int', 'xbzrle-overflow': 'int' } }
##
# @MigrationInfo
@@ -291,13 +315,16 @@
# @capabilities: #optional a list describing all the migration capabilities
# state
#
-# Since: 0.14.0, 'capabilities' since 1.2
+# @cache: #optional @MigrationStats containing detailed XBZRLE migration
+# statistics
+#
+# Since: 0.14.0, 'capabilities' and 'cache' since 1.2
##
{ 'type': 'MigrationInfo',
'data': {'*status': 'str', '*ram': 'MigrationStats',
'*disk': 'MigrationStats',
- '*capabilities': ['MigrationCapabilityInfo']} }
-
+ '*capabilities': ['MigrationCapabilityInfo'],
+ '*cache': 'CacheStats'} }
##
# @query-migrate
#
diff --git a/qmp-commands.hx b/qmp-commands.hx
index a3d57ce..34d4675 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -2093,6 +2093,8 @@ The main json-object contains the following:
- "transferred": amount transferred (json-int)
- "remaining": amount remaining (json-int)
- "total": total (json-int)
+ - "duplicate": number of duplicated pages (json-int)
+ - "normal" : number of normal pages transferred (json-int)
- "disk": only present if "status" is "active" and it is a block migration,
it is a json-object with the following disk information (in bytes):
- "transferred": amount transferred (json-int)
@@ -2100,10 +2102,17 @@ The main json-object contains the following:
- "total": total (json-int)
- "capabilities": migration capabilities state
- "xbzrle" : XBZRLE state (json-bool)
+- "cache": only present if "status" and XBZRLE is active.
+ It is a json-object with the following XBZRLE information:
+ - "cache-size": XBZRLE cache size
+ - "xbzrle-bytes": total XBZRLE bytes transferred
+ - "xbzrle-pages": number of XBZRLE compressed pages
+ - "cache-miss": number of cache misses
+ - "overflow": number of XBZRLE overflows
+
Examples:
1. Before the first migration
-
-> { "execute": "query-migrate" }
<- { "return": {
"capabilities" : [ { "capability" : "xbzrle", "state" : false } ]
@@ -2164,6 +2173,30 @@ 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
+ },
+ "cache":{
+ "cache-size": 1024
+ "xbzrle-transferred":20971520,
+ "xbzrle-pages":2444343,
+ "xbzrle-cache-miss":2244,
+ "xbzrle-overflow":34434
+ }
+ }
+ }
+
EQMP
{
--
1.7.10.4
