From patchwork Mon Feb 13 17:19:44 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Juan Quintela X-Patchwork-Id: 9570443 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id EDCC66045D for ; Mon, 13 Feb 2017 17:26:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DE67725404 for ; Mon, 13 Feb 2017 17:26:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D3212271CB; Mon, 13 Feb 2017 17:26:05 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 41CB925404 for ; Mon, 13 Feb 2017 17:26:04 +0000 (UTC) Received: from localhost ([::1]:58363 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cdKO4-000538-1U for patchwork-qemu-devel@patchwork.kernel.org; Mon, 13 Feb 2017 12:26:04 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57850) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cdKIQ-00087F-HF for qemu-devel@nongnu.org; Mon, 13 Feb 2017 12:20:16 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cdKIN-0004yw-9j for qemu-devel@nongnu.org; Mon, 13 Feb 2017 12:20:14 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48615) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cdKIN-0004yR-17 for qemu-devel@nongnu.org; Mon, 13 Feb 2017 12:20:11 -0500 Received: from smtp.corp.redhat.com (int-mx16.intmail.prod.int.phx2.redhat.com [10.5.11.28]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 40B5181236 for ; Mon, 13 Feb 2017 17:20:11 +0000 (UTC) Received: from emacs.mitica (ovpn-117-176.ams2.redhat.com [10.36.117.176]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1931D43DF7; Mon, 13 Feb 2017 17:20:09 +0000 (UTC) From: Juan Quintela To: qemu-devel@nongnu.org Date: Mon, 13 Feb 2017 18:19:44 +0100 Message-Id: <1487006388-7966-9-git-send-email-quintela@redhat.com> In-Reply-To: <1487006388-7966-1-git-send-email-quintela@redhat.com> References: <1487006388-7966-1-git-send-email-quintela@redhat.com> X-Scanned-By: MIMEDefang 2.74 on 10.5.11.28 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Mon, 13 Feb 2017 17:20:11 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 08/12] migration: Create ram_multifd_page X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: amit.shah@redhat.com, dgilbert@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP 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 Reviewed-by: Dr. David Alan Gilbert --- 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 fc24dad..eec0ffd 100644 --- a/hmp.c +++ b/hmp.c @@ -223,6 +223,8 @@ 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 ff890b5..cad03ab 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -290,6 +290,7 @@ 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 d2705d7..2e3b357 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 b101a59..45c46cb 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; @@ -998,6 +1005,33 @@ 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) { @@ -1435,6 +1469,8 @@ 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); @@ -2682,6 +2718,10 @@ 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 @@ -2706,13 +2746,17 @@ 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); @@ -2787,6 +2831,11 @@ 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 4fdea1a..03a0383 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: