From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33809) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cVmEF-0002GY-4S for qemu-devel@nongnu.org; Mon, 23 Jan 2017 16:32:44 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cVmED-00038x-OL for qemu-devel@nongnu.org; Mon, 23 Jan 2017 16:32:43 -0500 Received: from mx1.redhat.com ([209.132.183.28]:41068) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cVmED-00037M-H0 for qemu-devel@nongnu.org; Mon, 23 Jan 2017 16:32:41 -0500 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B32AE7FE85 for ; Mon, 23 Jan 2017 21:32:41 +0000 (UTC) From: Juan Quintela Date: Mon, 23 Jan 2017 22:32:14 +0100 Message-Id: <1485207141-1941-11-git-send-email-quintela@redhat.com> In-Reply-To: <1485207141-1941-1-git-send-email-quintela@redhat.com> References: <1485207141-1941-1-git-send-email-quintela@redhat.com> Subject: [Qemu-devel] [PATCH 10/17] migration: create ram_multifd_page List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: amit.shah@redhat.com, dgilbert@redhat.com 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 --- hmp.c | 2 ++ include/migration/migration.h | 1 + migration/migration.c | 1 + migration/ram.c | 51 ++++++++++++++++++++++++++++++++++++++++++- qapi-schema.json | 4 +++- 5 files changed, 57 insertions(+), 2 deletions(-) diff --git a/hmp.c b/hmp.c index e579766..76bc8c7 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 3989bd6..b3e4f31 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -282,6 +282,7 @@ 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 ab48f06..1d62b91 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -652,6 +652,7 @@ 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 5ad7cb3..c71929e 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -61,6 +61,7 @@ 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 uint8_t *ZERO_TARGET_PAGE; @@ -141,6 +142,7 @@ 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; @@ -211,6 +213,11 @@ 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; @@ -990,6 +997,33 @@ 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) { @@ -1427,6 +1461,8 @@ static int ram_save_target_page(MigrationState *ms, QEMUFile *f, res = ram_save_compressed_page(f, pss, last_stage, bytes_transferred); + } else if (migrate_use_multifd()) { + res = ram_multifd_page(f, pss, last_stage, bytes_transferred); } else { res = ram_save_page(f, pss, last_stage, bytes_transferred); @@ -2678,6 +2714,10 @@ static int ram_load(QEMUFile *f, void *opaque, int version_id) if (!migrate_use_compression()) { invalid_flags |= RAM_SAVE_FLAG_COMPRESS_PAGE; } + + if (!migrate_use_multifd()) { + invalid_flags |= RAM_SAVE_FLAG_MULTIFD_PAGE; + } /* This RCU critical section can be very long running. * When RCU reclaims in the code start to become numerous, * it will be necessary to reduce the granularity of this @@ -2705,13 +2745,17 @@ static int ram_load(QEMUFile *f, void *opaque, int version_id) if (flags & invalid_flags & RAM_SAVE_FLAG_COMPRESS_PAGE) { error_report("Received an unexpected compressed page"); } + if (flags & invalid_flags & RAM_SAVE_FLAG_MULTIFD_PAGE) { + error_report("Received an unexpected multifd page"); + } ret = -EINVAL; break; } 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); @@ -2786,6 +2830,11 @@ 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 54232ee..3e93f7f 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -574,6 +574,7 @@ # # @postcopy-requests: The number of page requests received from the destination # (since 2.7) +# @multifd: number of pages sent with multifd (since 2.9) # # Since: 0.14.0 ## @@ -582,7 +583,8 @@ '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: -- 2.9.3