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| author | Li Qiang <liq3ea@gmail.com> | 2018-08-01 06:00:20 -0700 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2018-08-22 11:42:34 +0200 |
| commit | 4cbc9c7ffd95d2702cf7ffb3bfdf3f1f0ffdca07 (patch) | |
| tree | c801c82f52bf803b7eae1fc360bc665ade81f26b /qapi/migration.json | |
| parent | 3eb21fe9e5a06e485dbb27838422ef85f4ae7967 (diff) | |
| download | focaccia-qemu-4cbc9c7ffd95d2702cf7ffb3bfdf3f1f0ffdca07.tar.gz focaccia-qemu-4cbc9c7ffd95d2702cf7ffb3bfdf3f1f0ffdca07.zip | |
migrate/cpu-throttle: Add max-cpu-throttle migration parameter
Currently, the default maximum CPU throttle for migration is 99(CPU_THROTTLE_PCT_MAX). This is too big and can make a remarkable performance effect for the guest. We see a lot of packets latency exceed 500ms when the CPU_THROTTLE_PCT_MAX reached. This patch set adds a new max-cpu-throttle parameter to limit the CPU throttle. Signed-off-by: Li Qiang <liq3ea@gmail.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'qapi/migration.json')
| -rw-r--r-- | qapi/migration.json | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/qapi/migration.json b/qapi/migration.json index 4040728439..cabe234c36 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -522,6 +522,9 @@ # @max-postcopy-bandwidth: Background transfer bandwidth during postcopy. # Defaults to 0 (unlimited). In bytes per second. # (Since 3.0) +# +# @max-cpu-throttle: maximum cpu throttle percentage. +# Defaults to 99. (Since 3.1) # Since: 2.4 ## { 'enum': 'MigrationParameter', @@ -530,7 +533,8 @@ 'tls-creds', 'tls-hostname', 'max-bandwidth', 'downtime-limit', 'x-checkpoint-delay', 'block-incremental', 'x-multifd-channels', 'x-multifd-page-count', - 'xbzrle-cache-size', 'max-postcopy-bandwidth' ] } + 'xbzrle-cache-size', 'max-postcopy-bandwidth', + 'max-cpu-throttle' ] } ## # @MigrateSetParameters: @@ -602,6 +606,10 @@ # @max-postcopy-bandwidth: Background transfer bandwidth during postcopy. # Defaults to 0 (unlimited). In bytes per second. # (Since 3.0) +# +# @max-cpu-throttle: maximum cpu throttle percentage. +# The default value is 99. (Since 3.1) +# # Since: 2.4 ## # TODO either fuse back into MigrationParameters, or make @@ -621,7 +629,8 @@ '*x-multifd-channels': 'int', '*x-multifd-page-count': 'int', '*xbzrle-cache-size': 'size', - '*max-postcopy-bandwidth': 'size' } } + '*max-postcopy-bandwidth': 'size', + '*max-cpu-throttle': 'int' } } ## # @migrate-set-parameters: @@ -708,6 +717,11 @@ # @max-postcopy-bandwidth: Background transfer bandwidth during postcopy. # Defaults to 0 (unlimited). In bytes per second. # (Since 3.0) +# +# @max-cpu-throttle: maximum cpu throttle percentage. +# Defaults to 99. +# (Since 3.1) +# # Since: 2.4 ## { 'struct': 'MigrationParameters', @@ -725,7 +739,8 @@ '*x-multifd-channels': 'uint8', '*x-multifd-page-count': 'uint32', '*xbzrle-cache-size': 'size', - '*max-postcopy-bandwidth': 'size' } } + '*max-postcopy-bandwidth': 'size', + '*max-cpu-throttle':'uint8'} } ## # @query-migrate-parameters: |