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| author | Keqian Zhu <zhukeqian1@huawei.com> | 2020-02-24 10:31:42 +0800 |
|---|---|---|
| committer | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2020-03-13 09:36:30 +0000 |
| commit | dc14a470763c96fd9d360e1028ce38e8c3613a77 (patch) | |
| tree | 94e4b1b2ae5f0d37d588db7beb45bfe56c6a4282 /monitor | |
| parent | 297254c71b302abf9f4f37c41e274b5722e1a5da (diff) | |
| download | qemu-dc14a470763c96fd9d360e1028ce38e8c3613a77.zip qemu-dc14a470763c96fd9d360e1028ce38e8c3613a77.tar.gz qemu-dc14a470763c96fd9d360e1028ce38e8c3613a77.tar.bz2 | |
migration/throttle: Add throttle-trig-thres migration parameter
Currently, if the bytes_dirty_period is more than the 50% of
bytes_xfer_period, we start or increase throttling.
If we make this percentage higher, then we can tolerate higher
dirty rate during migration, which means less impact on guest.
The side effect of higher percentage is longer migration time.
We can make this parameter configurable to switch between mig-
ration time first or guest performance first.
The default value is 50 and valid range is 1 to 100.
Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Message-Id: <20200224023142.39360-1-zhukeqian1@huawei.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Diffstat (limited to 'monitor')
| -rw-r--r-- | monitor/hmp-cmds.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c index 1c69d51..5872403 100644 --- a/monitor/hmp-cmds.c +++ b/monitor/hmp-cmds.c @@ -407,6 +407,10 @@ void hmp_info_migrate_parameters(Monitor *mon, const QDict *qdict) monitor_printf(mon, "%s: %u\n", MigrationParameter_str(MIGRATION_PARAMETER_DECOMPRESS_THREADS), params->decompress_threads); + assert(params->has_throttle_trigger_threshold); + monitor_printf(mon, "%s: %u\n", + MigrationParameter_str(MIGRATION_PARAMETER_THROTTLE_TRIGGER_THRESHOLD), + params->throttle_trigger_threshold); assert(params->has_cpu_throttle_initial); monitor_printf(mon, "%s: %u\n", MigrationParameter_str(MIGRATION_PARAMETER_CPU_THROTTLE_INITIAL), @@ -1254,6 +1258,9 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict) p->has_decompress_threads = true; visit_type_int(v, param, &p->decompress_threads, &err); break; + case MIGRATION_PARAMETER_THROTTLE_TRIGGER_THRESHOLD: + p->has_throttle_trigger_threshold = true; + visit_type_int(v, param, &p->throttle_trigger_threshold, &err); case MIGRATION_PARAMETER_CPU_THROTTLE_INITIAL: p->has_cpu_throttle_initial = true; visit_type_int(v, param, &p->cpu_throttle_initial, &err); |