blob: f690b98a03e76c1742a68f6fe02b881f4daae8b5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/*
* 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.
*/
#include "qemu/osdep.h"
#include "qemu/stats64.h"
#include "qemu-file.h"
#include "trace.h"
#include "migration-stats.h"
MigrationAtomicStats mig_stats;
bool migration_rate_exceeded(QEMUFile *f)
{
if (qemu_file_get_error(f)) {
return true;
}
uint64_t rate_limit_max = migration_rate_get();
if (rate_limit_max == RATE_LIMIT_DISABLED) {
return false;
}
uint64_t rate_limit_start = stat64_get(&mig_stats.rate_limit_start);
uint64_t rate_limit_current = migration_transferred_bytes();
uint64_t rate_limit_used = rate_limit_current - rate_limit_start;
if (rate_limit_max > 0 && rate_limit_used > rate_limit_max) {
return true;
}
return false;
}
uint64_t migration_rate_get(void)
{
return stat64_get(&mig_stats.rate_limit_max);
}
#define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY)
void migration_rate_set(uint64_t limit)
{
/*
* 'limit' is per second. But we check it each BUFFER_DELAY milliseconds.
*/
stat64_set(&mig_stats.rate_limit_max, limit / XFER_LIMIT_RATIO);
}
void migration_rate_reset(void)
{
stat64_set(&mig_stats.rate_limit_start, migration_transferred_bytes());
}
uint64_t migration_transferred_bytes(void)
{
uint64_t multifd = stat64_get(&mig_stats.multifd_bytes);
uint64_t rdma = stat64_get(&mig_stats.rdma_bytes);
uint64_t qemu_file = stat64_get(&mig_stats.qemu_file_transferred);
trace_migration_transferred_bytes(qemu_file, multifd, rdma);
return qemu_file + multifd + rdma;
}
|
