commit a14fdeed2c7d7446f79a991d561426d0a73a2583
author Frederick Mayle <fmayle@google.com> Thu Sep 22 22:55:06 2022 +0000
committer Frederick Mayle <fmayle@google.com> Mon Sep 26 18:21:30 2022 +0000
tree 6f4dcb9eed98ae0d16958ff6d38e8d3114943678
parent a766f310d49227808cdffd0f37a0f60f3c3d743e

MicrodroidBenchmarks: Measure crosvm RSS and PSS from the host side

Example run (only the mem_crosvm_* metrics are new):

    $ atest com.android.microdroid.benchmark.MicrodroidBenchmarks#testMemoryUsage
    ...
    [1/2] com.android.microdroid.benchmark.MicrodroidBenchmarks#testMemoryUsage[protectedVm=false]: PASSED (1.594s)
            avf_perf/microdroid/mem_crosvm_guest_rss_MB: 99.76953125
            avf_perf/microdroid/mem_kernel_MB: 42.8125
            avf_perf/microdroid/mem_crosvm_host_rss_MB: 8.89453125
            avf_perf/microdroid/mem_cached_MB: 27.71484375
            avf_perf/microdroid/mem_buffers_MB: 2.34765625
            avf_perf/microdroid/mem_used_MB: 15.22265625
            avf_perf/microdroid/mem_crosvm_host_pss_MB: 5.8447265625
            avf_perf/microdroid/mem_unreclaimable_MB: 35.48828125
            avf_perf/microdroid/mem_slab_MB: 21.4140625
            avf_perf/microdroid/mem_crosvm_guest_pss_MB: 99.76953125
    [2/2] com.android.microdroid.benchmark.MicrodroidBenchmarks#testMemoryUsage[protectedVm=true]: PASSED (5.209s)
            avf_perf/microdroid/mem_crosvm_guest_rss_MB: 113.70703125
            avf_perf/microdroid/mem_kernel_MB: 56.81640625
            avf_perf/microdroid/mem_crosvm_host_rss_MB: 8.98828125
            avf_perf/microdroid/mem_cached_MB: 27.74609375
            avf_perf/microdroid/mem_buffers_MB: 2.359375
            avf_perf/microdroid/mem_used_MB: 14.65625
            avf_perf/microdroid/mem_crosvm_host_pss_MB: 5.9482421875
            avf_perf/microdroid/mem_unreclaimable_MB: 34.87109375
            avf_perf/microdroid/mem_slab_MB: 21.609375
            avf_perf/microdroid/mem_crosvm_guest_pss_MB: 113.70703125

Note that the measurements from inside and outside the guest don't
match, e.g. the sum of guest side measurements for non-protected is
110MB while the RSS from the host side for the guest RAM mmap is 100MB.
This is probably expected, e.g. if the guest might have allocated guest
physical memory for something, but not actually touched the pages, so it
won't be resident on the host.

Change-Id: I0120e11baa3a94fb27a50820c2c5d4962da67d75
Bug: 233870249
Test: atest com.android.microdroid.benchmark.MicrodroidBenchmarks#testMemoryUsage