This change adds zero page counters and updates multifd send/receive
tracing format to track the newly added counters.
Signed-off-by: Hao Xiang <hao.xi...@bytedance.com>
---
migration/migration-hmp-cmds.c | 4 ++++
migration/multifd.c | 43 ++++++++++++++++++++++++++--------
migration/multifd.h | 17 +++++++++++++-
migration/trace-events | 8 +++----
4 files changed, 57 insertions(+), 15 deletions(-)
diff --git a/migration/migration-hmp-cmds.c b/migration/migration-hmp-cmds.c
index 8b0c205a41..2dd99b0509 100644
--- a/migration/migration-hmp-cmds.c
+++ b/migration/migration-hmp-cmds.c
@@ -111,6 +111,10 @@ void hmp_info_migrate(Monitor *mon, const QDict *qdict)
info->ram->normal);
monitor_printf(mon, "normal bytes: %" PRIu64 " kbytes\n",
info->ram->normal_bytes >> 10);
+ monitor_printf(mon, "zero: %" PRIu64 " pages\n",
+ info->ram->zero);
+ monitor_printf(mon, "zero bytes: %" PRIu64 " kbytes\n",
+ info->ram->zero_bytes >> 10);
monitor_printf(mon, "dirty sync count: %" PRIu64 "\n",
info->ram->dirty_sync_count);
monitor_printf(mon, "page size: %" PRIu64 " kbytes\n",
diff --git a/migration/multifd.c b/migration/multifd.c
index 25cbc6dc6b..a20d0ed10e 100644
--- a/migration/multifd.c
+++ b/migration/multifd.c
@@ -264,6 +264,7 @@ static void multifd_send_fill_packet(MultiFDSendParams *p)
packet->flags = cpu_to_be32(p->flags);
packet->pages_alloc = cpu_to_be32(p->pages->allocated);
packet->normal_pages = cpu_to_be32(p->normal_num);
+ packet->zero_pages = cpu_to_be32(p->zero_num);
packet->next_packet_size = cpu_to_be32(p->next_packet_size);
packet->packet_num = cpu_to_be64(p->packet_num);
@@ -317,18 +318,26 @@ static int multifd_recv_unfill_packet(MultiFDRecvParams
*p, Error **errp)
p->normal_num = be32_to_cpu(packet->normal_pages);
if (p->normal_num > packet->pages_alloc) {
error_setg(errp, "multifd: received packet "
- "with %u pages and expected maximum pages are %u",
+ "with %u normal pages and expected maximum pages are %u",
p->normal_num, packet->pages_alloc) ;
return -1;
}
- p->next_packet_size = be32_to_cpu(packet->next_packet_size);
- p->packet_num = be64_to_cpu(packet->packet_num);
+ p->zero_num = be32_to_cpu(packet->zero_pages);
+ if (p->zero_num > packet->pages_alloc - p->normal_num) {
+ error_setg(errp, "multifd: received packet "
+ "with %u zero pages and expected maximum zero pages are %u",
+ p->zero_num, packet->pages_alloc - p->normal_num) ;
+ return -1;
+ }
- if (p->normal_num == 0) {
+ if (p->normal_num == 0 && p->zero_num == 0) {
return 0;
}
+ p->next_packet_size = be32_to_cpu(packet->next_packet_size);
+ p->packet_num = be64_to_cpu(packet->packet_num);
+
/* make sure that ramblock is 0 terminated */
packet->ramblock[255] = 0;
p->block = qemu_ram_block_by_name(packet->ramblock);
@@ -430,6 +439,7 @@ static int multifd_send_pages(void)
p->packet_num = multifd_send_state->packet_num++;
multifd_send_state->pages = p->pages;
p->pages = pages;
+
qemu_mutex_unlock(&p->mutex);
qemu_sem_post(&p->sem);
@@ -551,6 +561,8 @@ void multifd_save_cleanup(void)
p->iov = NULL;
g_free(p->normal);
p->normal = NULL;
+ g_free(p->zero);
+ p->zero = NULL;
multifd_send_state->ops->send_cleanup(p, &local_err);
if (local_err) {
migrate_set_error(migrate_get_current(), local_err);
@@ -679,6 +691,7 @@ static void *multifd_send_thread(void *opaque)
uint64_t packet_num = p->packet_num;
uint32_t flags;
p->normal_num = 0;
+ p->zero_num = 0;
if (use_zero_copy_send) {
p->iovs_num = 0;
@@ -703,12 +716,13 @@ static void *multifd_send_thread(void *opaque)
p->flags = 0;
p->num_packets++;
p->total_normal_pages += p->normal_num;
+ p->total_zero_pages += p->zero_num;
p->pages->num = 0;
p->pages->block = NULL;
qemu_mutex_unlock(&p->mutex);
- trace_multifd_send(p->id, packet_num, p->normal_num, flags,
- p->next_packet_size);
+ trace_multifd_send(p->id, packet_num, p->normal_num, p->zero_num,
+ flags, p->next_packet_size);
if (use_zero_copy_send) {
/* Send header first, without zerocopy */
@@ -731,6 +745,8 @@ static void *multifd_send_thread(void *opaque)
stat64_add(&mig_stats.multifd_bytes,
p->next_packet_size + p->packet_len);
+ stat64_add(&mig_stats.normal_pages, p->normal_num);
+ stat64_add(&mig_stats.zero_pages, p->zero_num);
p->next_packet_size = 0;
qemu_mutex_lock(&p->mutex);
p->pending_job--;
@@ -761,7 +777,8 @@ out:
rcu_unregister_thread();
migration_threads_remove(thread);
- trace_multifd_send_thread_end(p->id, p->num_packets,
p->total_normal_pages);
+ trace_multifd_send_thread_end(p->id, p->num_packets, p->total_normal_pages,
+ p->total_zero_pages);
return NULL;
}
@@ -936,6 +953,7 @@ int multifd_save_setup(Error **errp)
/* We need one extra place for the packet header */
p->iov = g_new0(struct iovec, page_count + 1);
p->normal = g_new0(ram_addr_t, page_count);
+ p->zero = g_new0(ram_addr_t, page_count);
p->page_size = qemu_target_page_size();
p->page_count = page_count;
@@ -1051,6 +1069,8 @@ void multifd_load_cleanup(void)
p->iov = NULL;
g_free(p->normal);
p->normal = NULL;
+ g_free(p->zero);
+ p->zero = NULL;
multifd_recv_state->ops->recv_cleanup(p);
}
qemu_sem_destroy(&multifd_recv_state->sem_sync);
@@ -1119,10 +1139,11 @@ static void *multifd_recv_thread(void *opaque)
flags = p->flags;
/* recv methods don't know how to handle the SYNC flag */
p->flags &= ~MULTIFD_FLAG_SYNC;
- trace_multifd_recv(p->id, p->packet_num, p->normal_num, flags,
- p->next_packet_size);
+ trace_multifd_recv(p->id, p->packet_num, p->normal_num, p->zero_num,
+ flags, p->next_packet_size);
p->num_packets++;
p->total_normal_pages += p->normal_num;
+ p->total_zero_pages += p->zero_num;
qemu_mutex_unlock(&p->mutex);
if (p->normal_num) {
@@ -1147,7 +1168,8 @@ static void *multifd_recv_thread(void *opaque)
qemu_mutex_unlock(&p->mutex);
rcu_unregister_thread();
- trace_multifd_recv_thread_end(p->id, p->num_packets,
p->total_normal_pages);
+ trace_multifd_recv_thread_end(p->id, p->num_packets, p->total_normal_pages,
+ p->total_zero_pages);
return NULL;
}
@@ -1186,6 +1208,7 @@ int multifd_load_setup(Error **errp)
p->name = g_strdup_printf("multifdrecv_%d", i);
p->iov = g_new0(struct iovec, page_count);
p->normal = g_new0(ram_addr_t, page_count);
+ p->zero = g_new0(ram_addr_t, page_count);
p->page_count = page_count;
p->page_size = qemu_target_page_size();
}
diff --git a/migration/multifd.h b/migration/multifd.h
index 35d11f103c..6be9b2f6c1 100644
--- a/migration/multifd.h
+++ b/migration/multifd.h
@@ -48,7 +48,10 @@ typedef struct {
/* size of the next packet that contains pages */
uint32_t next_packet_size;
uint64_t packet_num;
- uint64_t unused[4]; /* Reserved for future use */
+ /* zero pages */
+ uint32_t zero_pages;
+ uint32_t unused32[1]; /* Reserved for future use */
+ uint64_t unused64[3]; /* Reserved for future use */
char ramblock[256];
uint64_t offset[];
} __attribute__((packed)) MultiFDPacket_t;
@@ -120,6 +123,8 @@ typedef struct {
uint64_t num_packets;
/* non zero pages sent through this channel */
uint64_t total_normal_pages;
+ /* zero pages sent through this channel */
+ uint64_t total_zero_pages;
/* buffers to send */
struct iovec *iov;
/* number of iovs used */
@@ -128,6 +133,10 @@ typedef struct {
ram_addr_t *normal;
/* num of non zero pages */
uint32_t normal_num;
+ /* Pages that are zero */
+ ram_addr_t *zero;
+ /* num of zero pages */
+ uint32_t zero_num;
/* used for compression methods */
void *data;
} MultiFDSendParams;
@@ -179,12 +188,18 @@ typedef struct {
uint8_t *host;
/* non zero pages recv through this channel */
uint64_t total_normal_pages;
+ /* zero pages recv through this channel */
+ uint64_t total_zero_pages;
/* buffers to recv */
struct iovec *iov;
/* Pages that are not zero */
ram_addr_t *normal;
/* num of non zero pages */
uint32_t normal_num;
+ /* Pages that are zero */
+ ram_addr_t *zero;
+ /* num of zero pages */
+ uint32_t zero_num;
/* used for de-compression methods */
void *data;
} MultiFDRecvParams;
diff --git a/migration/trace-events b/migration/trace-events
index de4a743c8a..c0a758db9d 100644
--- a/migration/trace-events
+++ b/migration/trace-events
@@ -128,21 +128,21 @@ postcopy_preempt_reset_channel(void) ""
# multifd.c
multifd_new_send_channel_async(uint8_t id) "channel %u"
multifd_new_send_channel_async_error(uint8_t id, void *err) "channel=%u err=%p"
-multifd_recv(uint8_t id, uint64_t packet_num, uint32_t used, uint32_t flags,
uint32_t next_packet_size) "channel %u packet_num %" PRIu64 " pages %u flags
0x%x next packet size %u"
+multifd_recv(uint8_t id, uint64_t packet_num, uint32_t normal, uint32_t zero,
uint32_t flags, uint32_t next_packet_size) "channel %u packet_num %" PRIu64 "
normal pages %u zero pages %u flags 0x%x next packet size %u"
multifd_recv_new_channel(uint8_t id) "channel %u"
multifd_recv_sync_main(long packet_num) "packet num %ld"
multifd_recv_sync_main_signal(uint8_t id) "channel %u"
multifd_recv_sync_main_wait(uint8_t id) "channel %u"
multifd_recv_terminate_threads(bool error) "error %d"
-multifd_recv_thread_end(uint8_t id, uint64_t packets, uint64_t pages) "channel
%u packets %" PRIu64 " pages %" PRIu64
+multifd_recv_thread_end(uint8_t id, uint64_t packets, uint64_t normal_pages,
uint64_t zero_pages) "channel %u packets %" PRIu64 " normal pages %" PRIu64 "
zero pages %" PRIu64
multifd_recv_thread_start(uint8_t id) "%u"
-multifd_send(uint8_t id, uint64_t packet_num, uint32_t normal, uint32_t flags,
uint32_t next_packet_size) "channel %u packet_num %" PRIu64 " normal pages %u
flags 0x%x next packet size %u"
+multifd_send(uint8_t id, uint64_t packet_num, uint32_t normalpages, uint32_t
zero_pages, uint32_t flags, uint32_t next_packet_size) "channel %u packet_num
%" PRIu64 " normal pages %u zero pages %u flags 0x%x next packet size %u"
multifd_send_error(uint8_t id) "channel %u"
multifd_send_sync_main(long packet_num) "packet num %ld"
multifd_send_sync_main_signal(uint8_t id) "channel %u"
multifd_send_sync_main_wait(uint8_t id) "channel %u"
multifd_send_terminate_threads(bool error) "error %d"
-multifd_send_thread_end(uint8_t id, uint64_t packets, uint64_t normal_pages)
"channel %u packets %" PRIu64 " normal pages %" PRIu64
+multifd_send_thread_end(uint8_t id, uint64_t packets, uint64_t normal_pages,
uint64_t zero_pages) "channel %u packets %" PRIu64 " normal pages %" PRIu64 "
zero pages %" PRIu64
multifd_send_thread_start(uint8_t id) "%u"
multifd_tls_outgoing_handshake_start(void *ioc, void *tioc, const char
*hostname) "ioc=%p tioc=%p hostname=%s"
multifd_tls_outgoing_handshake_error(void *ioc, const char *err) "ioc=%p
err=%s"
--
2.30.2
