[mirror_qemu.git] / migration / migration-stats.h

/*
 * Migration stats
 *
 * Copyright (c) 2012-2023 Red Hat Inc
 *
 * Authors:
 *  Juan Quintela <quintela@redhat.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 */

#ifndef QEMU_MIGRATION_STATS_H
#define QEMU_MIGRATION_STATS_H

#include "qemu/stats64.h"

/*
 * These are the ram migration statistic counters.  It is loosely
 * based on MigrationStats.  We change to Stat64 any counter that
 * needs to be updated using atomic ops (can be accessed by more than
 * one thread).
 */
typedef struct {
    /*
     * Number of bytes that were dirty last time that we synced with
     * the guest memory.  We use that to calculate the downtime.  As
     * the remaining dirty amounts to what we know that is still dirty
     * since last iteration, not counting what the guest has dirtied
     * since we synchronized bitmaps.
     */
    Stat64 dirty_bytes_last_sync;
    /*
     * Number of pages dirtied per second.
     */
    Stat64 dirty_pages_rate;
    /*
     * Number of times we have synchronized guest bitmaps.
     */
    Stat64 dirty_sync_count;
    /*
     * Number of times zero copy failed to send any page using zero
     * copy.
     */
    Stat64 dirty_sync_missed_zero_copy;
    /*
     * Number of bytes sent at migration completion stage while the
     * guest is stopped.
     */
    Stat64 downtime_bytes;
    /*
     * Number of bytes sent through multifd channels.
     */
    Stat64 multifd_bytes;
    /*
     * Number of pages transferred that were not full of zeros.
     */
    Stat64 normal_pages;
    /*
     * Number of bytes sent during postcopy.
     */
    Stat64 postcopy_bytes;
    /*
     * Number of postcopy page faults that we have handled during
     * postcopy stage.
     */
    Stat64 postcopy_requests;
    /*
     * Number of bytes sent during precopy stage.
     */
    Stat64 precopy_bytes;
    /*
     * Total number of bytes transferred.
     */
    Stat64 transferred;
    /*
     * Number of pages transferred that were full of zeros.
     */
    Stat64 zero_pages;
} MigrationAtomicStats;

extern MigrationAtomicStats mig_stats;

#endif
Commit	Line	Data
947701cc JQ	1	/*
	2	* Migration stats
	3	*
	4	* Copyright (c) 2012-2023 Red Hat Inc
	5	*
	6	* Authors:
	7	* Juan Quintela <quintela@redhat.com>
	8	*
	9	* This work is licensed under the terms of the GNU GPL, version 2 or later.
	10	* See the COPYING file in the top-level directory.
	11	*/
	12
	13	#ifndef QEMU_MIGRATION_STATS_H
	14	#define QEMU_MIGRATION_STATS_H
	15
	16	#include "qemu/stats64.h"
	17
	18	/*
	19	* These are the ram migration statistic counters. It is loosely
	20	* based on MigrationStats. We change to Stat64 any counter that
	21	* needs to be updated using atomic ops (can be accessed by more than
	22	* one thread).
	23	*/
	24	typedef struct {
e2ee2005 JQ	25	/*
	26	* Number of bytes that were dirty last time that we synced with
	27	* the guest memory. We use that to calculate the downtime. As
	28	* the remaining dirty amounts to what we know that is still dirty
	29	* since last iteration, not counting what the guest has dirtied
	30	* since we synchronized bitmaps.
	31	*/
947701cc	32	Stat64 dirty_bytes_last_sync;
e2ee2005 JQ	33	/*
	34	* Number of pages dirtied per second.
	35	*/
947701cc	36	Stat64 dirty_pages_rate;
e2ee2005 JQ	37	/*
	38	* Number of times we have synchronized guest bitmaps.
	39	*/
947701cc	40	Stat64 dirty_sync_count;
e2ee2005 JQ	41	/*
	42	* Number of times zero copy failed to send any page using zero
	43	* copy.
	44	*/
947701cc	45	Stat64 dirty_sync_missed_zero_copy;
e2ee2005 JQ	46	/*
	47	* Number of bytes sent at migration completion stage while the
	48	* guest is stopped.
	49	*/
947701cc	50	Stat64 downtime_bytes;
e2ee2005 JQ	51	/*
	52	* Number of bytes sent through multifd channels.
	53	*/
947701cc	54	Stat64 multifd_bytes;
e2ee2005 JQ	55	/*
	56	* Number of pages transferred that were not full of zeros.
	57	*/
947701cc	58	Stat64 normal_pages;
e2ee2005 JQ	59	/*
	60	* Number of bytes sent during postcopy.
	61	*/
947701cc	62	Stat64 postcopy_bytes;
e2ee2005 JQ	63	/*
	64	* Number of postcopy page faults that we have handled during
	65	* postcopy stage.
	66	*/
947701cc	67	Stat64 postcopy_requests;
e2ee2005 JQ	68	/*
	69	* Number of bytes sent during precopy stage.
	70	*/
947701cc	71	Stat64 precopy_bytes;
e2ee2005 JQ	72	/*
	73	* Total number of bytes transferred.
	74	*/
947701cc	75	Stat64 transferred;
40f240a7 JQ	76	/*
	77	* Number of pages transferred that were full of zeros.
	78	*/
	79	Stat64 zero_pages;
96820df2	80	} MigrationAtomicStats;
947701cc	81
96820df2	82	extern MigrationAtomicStats mig_stats;
947701cc JQ	83
947701cc JQ	84	#endif