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Blame SOURCES/kvm-rdma-account-for-the-time-spent-in-MIG_STATE_SETUP-t.patch

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From 55c36d5525751d4b2676e206680762769758d934 Mon Sep 17 00:00:00 2001
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Message-Id: <55c36d5525751d4b2676e206680762769758d934.1387382496.git.minovotn@redhat.com>
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In-Reply-To: <c5386144fbf09f628148101bc674e2421cdd16e3.1387382496.git.minovotn@redhat.com>
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References: <c5386144fbf09f628148101bc674e2421cdd16e3.1387382496.git.minovotn@redhat.com>
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From: Nigel Croxon <ncroxon@redhat.com>
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Date: Thu, 14 Nov 2013 22:52:55 +0100
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Subject: [PATCH 19/46] rdma: account for the time spent in MIG_STATE_SETUP
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 through QMP
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RH-Author: Nigel Croxon <ncroxon@redhat.com>
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Message-id: <1384469598-13137-20-git-send-email-ncroxon@redhat.com>
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Patchwork-id: 55701
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O-Subject: [RHEL7.0 PATCH 19/42] rdma: account for the time spent in MIG_STATE_SETUP through QMP
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Bugzilla: 1011720
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RH-Acked-by: Orit Wasserman <owasserm@redhat.com>
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RH-Acked-by: Amit Shah <amit.shah@redhat.com>
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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Bugzilla: 1011720
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https://bugzilla.redhat.com/show_bug.cgi?id=1011720
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>From commit ID:
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commit ed4fbd10823a7b0dbded6b481a68973e47f7e14d
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Author: Michael R. Hines <mrhines@us.ibm.com>
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Date:   Mon Jul 22 10:01:58 2013 -0400
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    rdma: account for the time spent in MIG_STATE_SETUP through QMP
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    Using the previous patches, we're now able to timestamp the SETUP
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    state. Once we have this time, let the user know about it in the
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    schema.
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    Reviewed-by: Juan Quintela <quintela@redhat.com>
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    Reviewed-by: Eric Blake <eblake@redhat.com>
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    Signed-off-by: Michael R. Hines <mrhines@us.ibm.com>
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    Signed-off-by: Juan Quintela <quintela@redhat.com>
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---
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 hmp.c                         |    4 ++++
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 include/migration/migration.h |    1 +
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 migration.c                   |    9 +++++++++
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 qapi-schema.json              |    9 ++++++++-
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 4 files changed, 22 insertions(+), 1 deletions(-)
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Signed-off-by: Michal Novotny <minovotn@redhat.com>
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---
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 hmp.c                         | 4 ++++
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 include/migration/migration.h | 1 +
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 migration.c                   | 9 +++++++++
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 qapi-schema.json              | 9 ++++++++-
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 4 files changed, 22 insertions(+), 1 deletion(-)
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diff --git a/hmp.c b/hmp.c
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index 316e6a1..841929d 100644
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--- a/hmp.c
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+++ b/hmp.c
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@@ -162,6 +162,10 @@ void hmp_info_migrate(Monitor *mon, const QDict *qdict)
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             monitor_printf(mon, "downtime: %" PRIu64 " milliseconds\n",
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                            info->downtime);
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         }
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+        if (info->has_setup_time) {
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+            monitor_printf(mon, "setup: %" PRIu64 " milliseconds\n",
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+                           info->setup_time);
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+        }
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     }
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     if (info->has_ram) {
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diff --git a/include/migration/migration.h b/include/migration/migration.h
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index 13a9629..08c772d 100644
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--- a/include/migration/migration.h
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+++ b/include/migration/migration.h
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@@ -49,6 +49,7 @@ struct MigrationState
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     int64_t dirty_bytes_rate;
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     bool enabled_capabilities[MIGRATION_CAPABILITY_MAX];
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     int64_t xbzrle_cache_size;
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+    int64_t setup_time;
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 };
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 void process_incoming_migration(QEMUFile *f);
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diff --git a/migration.c b/migration.c
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index ddbfd45..4f070a3 100644
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--- a/migration.c
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+++ b/migration.c
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@@ -191,6 +191,7 @@ MigrationInfo *qmp_query_migrate(Error **errp)
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     case MIG_STATE_SETUP:
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         info->has_status = true;
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         info->status = g_strdup("setup");
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+        info->has_total_time = false;
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         break;
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     case MIG_STATE_ACTIVE:
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         info->has_status = true;
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@@ -200,6 +201,8 @@ MigrationInfo *qmp_query_migrate(Error **errp)
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             - s->total_time;
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         info->has_expected_downtime = true;
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         info->expected_downtime = s->expected_downtime;
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+        info->has_setup_time = true;
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+        info->setup_time = s->setup_time;
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         info->has_ram = true;
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         info->ram = g_malloc0(sizeof(*info->ram));
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@@ -232,6 +235,8 @@ MigrationInfo *qmp_query_migrate(Error **errp)
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         info->total_time = s->total_time;
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         info->has_downtime = true;
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         info->downtime = s->downtime;
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+        info->has_setup_time = true;
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+        info->setup_time = s->setup_time;
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         info->has_ram = true;
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         info->ram = g_malloc0(sizeof(*info->ram));
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@@ -548,6 +553,7 @@ static void *migration_thread(void *opaque)
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 {
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     MigrationState *s = opaque;
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     int64_t initial_time = qemu_get_clock_ms(rt_clock);
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+    int64_t setup_start = qemu_get_clock_ms(host_clock);
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     int64_t initial_bytes = 0;
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     int64_t max_size = 0;
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     int64_t start_time = initial_time;
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@@ -556,8 +562,11 @@ static void *migration_thread(void *opaque)
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     DPRINTF("beginning savevm\n");
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     qemu_savevm_state_begin(s->file, &s->params);
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+    s->setup_time = qemu_get_clock_ms(host_clock) - setup_start;
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     migrate_set_state(s, MIG_STATE_SETUP, MIG_STATE_ACTIVE);
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+    DPRINTF("setup complete\n");
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+
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     while (s->state == MIG_STATE_ACTIVE) {
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         int64_t current_time;
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         uint64_t pending_size;
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diff --git a/qapi-schema.json b/qapi-schema.json
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index bf1fe68..7333b8f 100644
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--- a/qapi-schema.json
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+++ b/qapi-schema.json
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@@ -634,6 +634,12 @@
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 #        expected downtime in milliseconds for the guest in last walk
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 #        of the dirty bitmap. (since 1.3)
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 #
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+# @setup-time: #optional amount of setup time in milliseconds _before_ the
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+#        iterations begin but _after_ the QMP command is issued. This is designed
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+#        to provide an accounting of any activities (such as RDMA pinning) which
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+#        may be expensive, but do not actually occur during the iterative
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+#        migration rounds themselves. (since 1.6)
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+#
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 # Since: 0.14.0
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 ##
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 { 'type': 'MigrationInfo',
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@@ -642,7 +648,8 @@
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            '*xbzrle-cache': 'XBZRLECacheStats',
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            '*total-time': 'int',
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            '*expected-downtime': 'int',
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-           '*downtime': 'int'} }
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+           '*downtime': 'int',
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+           '*setup-time': 'int'} }
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 ##
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 # @query-migrate
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-- 
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1.7.11.7
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