tests/migration: Introduce dirty-limit into guestperf

Currently, guestperf does not cover the dirty-limit
migration, support this feature.

Note that dirty-limit requires 'dirty-ring-size' set.

To enable dirty-limit, setting x-vcpu-dirty-limit-period
as 500ms and x-vcpu-dirty-limit as 10MB/s:
$ ./tests/migration/guestperf.py \
    --dirty-ring-size 4096 \
    --dirty-limit --x-vcpu-dirty-limit-period 500 \
    --vcpu-dirty-limit 10 --output output.json \

To run the entire standardized set of dirty-limit-enabled
comparisons, with unix migration:
$ ./tests/migration/guestperf-batch.py \
    --dirty-ring-size 4096 \
    --dst-host localhost --transport unix \
    --filter compr-dirty-limit* --output outputdir

Signed-off-by: Hyman Huang <yong.huang@smartx.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Message-Id: <516e7a55dfc6e33d33510be37eb24223de5dc072.1697815117.git.yong.huang@smartx.com>
Message-ID: <e1283565b00b34b0377bbd27bee4bb8fc7c255a8.1698847223.git.yong.huang@smartx.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/migration/guestperf/engine.py b/tests/migration/guestperf/engine.py
index aabf6de4d9..608d7270f6 100644
--- a/tests/migration/guestperf/engine.py
+++ b/tests/migration/guestperf/engine.py
@@ -102,6 +102,8 @@ class Engine(object):
             info.get("expected-downtime", 0),
             info.get("setup-time", 0),
             info.get("cpu-throttle-percentage", 0),
+            info.get("dirty-limit-throttle-time-per-round", 0),
+            info.get("dirty-limit-ring-full-time", 0),
         )
 
     def _migrate(self, hardware, scenario, src, dst, connect_uri):
@@ -203,6 +205,21 @@ class Engine(object):
             resp = dst.cmd("migrate-set-parameters",
                            multifd_channels=scenario._multifd_channels)
 
+        if scenario._dirty_limit:
+            if not hardware._dirty_ring_size:
+                raise Exception("dirty ring size must be configured when "
+                                "testing dirty limit migration")
+
+            resp = src.cmd("migrate-set-capabilities",
+                           capabilities = [
+                               { "capability": "dirty-limit",
+                                 "state": True }
+                           ])
+            resp = src.cmd("migrate-set-parameters",
+                x_vcpu_dirty_limit_period=scenario._x_vcpu_dirty_limit_period)
+            resp = src.cmd("migrate-set-parameters",
+                           vcpu_dirty_limit=scenario._vcpu_dirty_limit)
+
         resp = src.cmd("migrate", uri=connect_uri)
 
         post_copy = False