metrics: Update the expected midval for CI jobs using virtio-fs

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Disabling the DAX option of virtio-fsd has direct impact to the memory
foot-print and I/O performance. We need to adjust the expected midval
for our metrics CI jobs on cloud-hypervisor and qemu with virtiofs.

Depends-on: github.com/kata-containers/runtime#2997

Fixes: #2923

Signed-off-by: Bo Chen [email protected]

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/test-ubuntu-metrics
/test-clh-metrics

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/test-ubuntu

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The update reference data is based on multiple runs of the metrics CI in kata-runtime.

The data for qemu-virtiofs-metrics is from here (job 96-99). The collected data is as following:

Memory foot-print	MF-KSM	Blogbench-write
136614.48	134322.52	1419
136674.55	134375.78	1475
136785.74	134414.96	1475
136691.59	134371.0867	1456.333
153075.3*	150763.2*	1103*

*Note: the last row is clearly an outlier comparing with other data (log), and hence I did not include it when computing the average midval. In this way, we can keep our allowed range as +/-5% (instead of +/- 10%).

The data for clh-metrics is from here (job 134-138). The collected data is as following:

Memory foot-print	MF-KSM	Blogbench-write	Blogbench - read
272571.1	272537.7	1157	49972
272604.6	272533.45	1176	48592
272555.4	272529.55	1132	47771
272615.9	272586.25	1180	49108

/cc @GabyCT @jcvenegas

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/test-metrics-virtiofs

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The updated number looks to be working fine. I run the metrics CI for both clh (CI job 136-138) and qemu-virtiofs (CI job 70-72) 3 times each, and they were all passing.

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In general, both for clh and qemu-virtiofsd (non-KSM and KSM), the memory footprint reduced around ~6%. One more dramatic change is for clh's metrics on the blogbench, where the write performance reduced by 70% (from 3927.30 to 1161.25) while the read performance booted 4.25X (from 11488.28 to 48860.75).

@jcvenegas Can you please take a look at the updated numbers, and see whether that aligns with your observations from your experiments on virtiofsd?

/cc @GabyCT @amshinde @chavafg

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Remove the DNM to land it along with the other PR in runtime: kata-containers/runtime#2997.