85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/*
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* Migration stats
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*
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* Copyright (c) 2012-2023 Red Hat Inc
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*
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* Authors:
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* Juan Quintela <quintela@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef QEMU_MIGRATION_STATS_H
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#define QEMU_MIGRATION_STATS_H
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#include "qemu/stats64.h"
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/*
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* These are the ram migration statistic counters. It is loosely
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* based on MigrationStats. We change to Stat64 any counter that
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* needs to be updated using atomic ops (can be accessed by more than
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* one thread).
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*/
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typedef struct {
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/*
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* Number of bytes that were dirty last time that we synced with
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* the guest memory. We use that to calculate the downtime. As
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* the remaining dirty amounts to what we know that is still dirty
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* since last iteration, not counting what the guest has dirtied
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* since we synchronized bitmaps.
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*/
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Stat64 dirty_bytes_last_sync;
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/*
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* Number of pages dirtied per second.
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*/
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Stat64 dirty_pages_rate;
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/*
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* Number of times we have synchronized guest bitmaps.
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*/
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Stat64 dirty_sync_count;
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/*
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* Number of times zero copy failed to send any page using zero
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* copy.
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*/
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Stat64 dirty_sync_missed_zero_copy;
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/*
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* Number of bytes sent at migration completion stage while the
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* guest is stopped.
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*/
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Stat64 downtime_bytes;
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/*
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* Number of bytes sent through multifd channels.
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*/
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Stat64 multifd_bytes;
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/*
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* Number of pages transferred that were not full of zeros.
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*/
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Stat64 normal_pages;
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/*
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* Number of bytes sent during postcopy.
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*/
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Stat64 postcopy_bytes;
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/*
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* Number of postcopy page faults that we have handled during
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* postcopy stage.
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*/
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Stat64 postcopy_requests;
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/*
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* Number of bytes sent during precopy stage.
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*/
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Stat64 precopy_bytes;
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/*
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* Total number of bytes transferred.
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*/
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Stat64 transferred;
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/*
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* Number of pages transferred that were full of zeros.
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*/
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Stat64 zero_pages;
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} MigrationAtomicStats;
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extern MigrationAtomicStats mig_stats;
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#endif
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