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[Qemu-devel] [PATCH 07/13] migration: create ram_multifd_page
From: |
Juan Quintela |
Subject: |
[Qemu-devel] [PATCH 07/13] migration: create ram_multifd_page |
Date: |
Fri, 21 Oct 2016 21:42:09 +0200 |
The function still don't use multifd, but we have simplified
ram_save_page, xbzrle and RDMA stuff is gone. We have added a new
counter and a new flag for this type of pages.
Signed-off-by: Juan Quintela <address@hidden>
---
hmp.c | 2 ++
include/migration/migration.h | 1 +
migration/migration.c | 1 +
migration/ram.c | 44 ++++++++++++++++++++++++++++++++++++++++++-
qapi-schema.json | 4 +++-
5 files changed, 50 insertions(+), 2 deletions(-)
diff --git a/hmp.c b/hmp.c
index 54f9f03..17a0ee2 100644
--- a/hmp.c
+++ b/hmp.c
@@ -222,6 +222,8 @@ void hmp_info_migrate(Monitor *mon, const QDict *qdict)
monitor_printf(mon, "postcopy request count: %" PRIu64 "\n",
info->ram->postcopy_requests);
}
+ monitor_printf(mon, "multifd: %" PRIu64 " pages\n",
+ info->ram->multifd);
}
if (info->has_disk) {
diff --git a/include/migration/migration.h b/include/migration/migration.h
index 0b455d6..afdc7ec 100644
--- a/include/migration/migration.h
+++ b/include/migration/migration.h
@@ -274,6 +274,7 @@ uint64_t xbzrle_mig_pages_transferred(void);
uint64_t xbzrle_mig_pages_overflow(void);
uint64_t xbzrle_mig_pages_cache_miss(void);
double xbzrle_mig_cache_miss_rate(void);
+uint64_t multifd_mig_pages_transferred(void);
void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);
void ram_debug_dump_bitmap(unsigned long *todump, bool expected);
diff --git a/migration/migration.c b/migration/migration.c
index a4615f5..407e0c3 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -625,6 +625,7 @@ static void populate_ram_info(MigrationInfo *info,
MigrationState *s)
info->ram->mbps = s->mbps;
info->ram->dirty_sync_count = s->dirty_sync_count;
info->ram->postcopy_requests = s->postcopy_requests;
+ info->ram->multifd = multifd_mig_pages_transferred();
if (s->state != MIGRATION_STATUS_COMPLETED) {
info->ram->remaining = ram_bytes_remaining();
diff --git a/migration/ram.c b/migration/ram.c
index 0ea40eb..44b9380 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -68,6 +68,7 @@ static uint64_t bitmap_sync_count;
#define RAM_SAVE_FLAG_XBZRLE 0x40
/* 0x80 is reserved in migration.h start with 0x100 next */
#define RAM_SAVE_FLAG_COMPRESS_PAGE 0x100
+#define RAM_SAVE_FLAG_MULTIFD_PAGE 0x200
static const uint8_t ZERO_TARGET_PAGE[TARGET_PAGE_SIZE];
@@ -148,6 +149,7 @@ typedef struct AccountingInfo {
uint64_t dup_pages;
uint64_t skipped_pages;
uint64_t norm_pages;
+ uint64_t multifd_pages;
uint64_t iterations;
uint64_t xbzrle_bytes;
uint64_t xbzrle_pages;
@@ -218,6 +220,11 @@ uint64_t xbzrle_mig_pages_overflow(void)
return acct_info.xbzrle_overflows;
}
+uint64_t multifd_mig_pages_transferred(void)
+{
+ return acct_info.multifd_pages;
+}
+
/* This is the last block that we have visited serching for dirty pages
*/
static RAMBlock *last_seen_block;
@@ -995,6 +1002,33 @@ static int ram_save_page(QEMUFile *f, PageSearchStatus
*pss,
return pages;
}
+static int ram_multifd_page(QEMUFile *f, PageSearchStatus *pss,
+ bool last_stage, uint64_t *bytes_transferred)
+{
+ int pages;
+ uint8_t *p;
+ RAMBlock *block = pss->block;
+ ram_addr_t offset = pss->offset;
+
+ p = block->host + offset;
+
+ if (block == last_sent_block) {
+ offset |= RAM_SAVE_FLAG_CONTINUE;
+ }
+ pages = save_zero_page(f, block, offset, p, bytes_transferred);
+ if (pages == -1) {
+ *bytes_transferred +=
+ save_page_header(f, block, offset | RAM_SAVE_FLAG_MULTIFD_PAGE);
+ qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
+ *bytes_transferred += TARGET_PAGE_SIZE;
+ pages = 1;
+ acct_info.norm_pages++;
+ acct_info.multifd_pages++;
+ }
+
+ return pages;
+}
+
static int do_compress_ram_page(QEMUFile *f, RAMBlock *block,
ram_addr_t offset)
{
@@ -1432,6 +1466,8 @@ static int ram_save_target_page(MigrationState *ms,
QEMUFile *f,
res = ram_save_compressed_page(f, pss,
last_stage,
bytes_transferred);
+ } else if (migrate_multifd()) {
+ res = ram_multifd_page(f, pss, last_stage, bytes_transferred);
} else {
res = ram_save_page(f, pss, last_stage,
bytes_transferred);
@@ -2678,7 +2714,8 @@ static int ram_load(QEMUFile *f, void *opaque, int
version_id)
addr &= TARGET_PAGE_MASK;
if (flags & (RAM_SAVE_FLAG_COMPRESS | RAM_SAVE_FLAG_PAGE |
- RAM_SAVE_FLAG_COMPRESS_PAGE | RAM_SAVE_FLAG_XBZRLE)) {
+ RAM_SAVE_FLAG_COMPRESS_PAGE | RAM_SAVE_FLAG_XBZRLE |
+ RAM_SAVE_FLAG_MULTIFD_PAGE)) {
RAMBlock *block = ram_block_from_stream(f, flags);
host = host_from_ram_block_offset(block, addr);
@@ -2753,6 +2790,11 @@ static int ram_load(QEMUFile *f, void *opaque, int
version_id)
break;
}
break;
+
+ case RAM_SAVE_FLAG_MULTIFD_PAGE:
+ qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
+ break;
+
case RAM_SAVE_FLAG_EOS:
/* normal exit */
break;
diff --git a/qapi-schema.json b/qapi-schema.json
index b5c9a06..e5b3a84 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -405,6 +405,7 @@
#
# @postcopy-requests: The number of page requests received from the destination
# (since 2.7)
+# @multifd: number of pages sent with multifd (since 2.8)
#
# Since: 0.14.0
##
@@ -413,7 +414,8 @@
'duplicate': 'int', 'skipped': 'int', 'normal': 'int',
'normal-bytes': 'int', 'dirty-pages-rate' : 'int',
'mbps' : 'number', 'dirty-sync-count' : 'int',
- 'postcopy-requests' : 'int' } }
+ 'postcopy-requests' : 'int',
+ 'multifd' : 'int'} }
##
# @XBZRLECacheStats
--
2.7.4
- [Qemu-devel] [PATCH 02/13] migration: [HACK] Don't create decompression threads if not enabled, (continued)
- [Qemu-devel] [PATCH 02/13] migration: [HACK] Don't create decompression threads if not enabled, Juan Quintela, 2016/10/21
- [Qemu-devel] [PATCH 03/13] migration: Add multifd capability, Juan Quintela, 2016/10/21
- [Qemu-devel] [PATCH 04/13] migration: Create x-multifd-threads parameter, Juan Quintela, 2016/10/21
- [Qemu-devel] [PATCH 01/13] migration: create Migration Incoming State at init time, Juan Quintela, 2016/10/21
- [Qemu-devel] [PATCH 05/13] migration: create multifd migration threads, Juan Quintela, 2016/10/21
- [Qemu-devel] [PATCH 06/13] migration: Start of multiple fd work, Juan Quintela, 2016/10/21
- [Qemu-devel] [PATCH 07/13] migration: create ram_multifd_page,
Juan Quintela <=
- [Qemu-devel] [PATCH 09/13] migration: Send the fd number which we are going to use for this page, Juan Quintela, 2016/10/21
- [Qemu-devel] [PATCH 08/13] migration: Create thread infrastructure for multifd send side, Juan Quintela, 2016/10/21
- [Qemu-devel] [PATCH 11/13] migration: Test new fd infrastructure, Juan Quintela, 2016/10/21
- [Qemu-devel] [PATCH 10/13] migration: Create thread infrastructure for multifd recv side, Juan Quintela, 2016/10/21
- [Qemu-devel] [PATCH 12/13] migration: [HACK]Transfer pages over new channels, Juan Quintela, 2016/10/21
- [Qemu-devel] [PATCH 13/13] migration: flush receive queue, Juan Quintela, 2016/10/21
- Re: [Qemu-devel] [RFC 00/13] Multifd v2, no-reply, 2016/10/21