[1.7] backport IO metrics from main #4490
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This is needed to collect metrics depending on the number of remaining requests in the queue. (cherry picked from commit d480849) Signed-off-by: Nikita Kalyazin <kalyazin@amazon.com>
This is for it to be available in block and net modules. (cherry picked from commit 430a034) Signed-off-by: Nikita Kalyazin <kalyazin@amazon.com>
LatencyAggregateMetrics metrics are dictionaries rather than ints, so they require special treatment. (cherry picked from commit 012a38a) Signed-off-by: Nikita Kalyazin <kalyazin@amazon.com>
These metrics measure how long Firecracker VMM thread is blocked on the read/write syscalls when accessing data in the drive file. By looking at them, we will be able to see what portion of block latency is attributed to factors external to Firecracker. (cherry picked from commit e00d62d) Signed-off-by: Nikita Kalyazin <kalyazin@amazon.com>
This metric accumulates the number of pending requests sitting in the virtio queue while a request is being processed. By looking at this number, one may make a decision on whether an async IO solution would be beneficial. (cherry picked from commit 58a87ed) Signed-off-by: Nikita Kalyazin <kalyazin@amazon.com>
This metric measures how long Firecracker VMM thread is blocked on the write syscalls when accessing a tap device. By looking at it, we will be able to see what portion of tx net latency is attributed to factors external to Firecracker. (cherry picked from commit f7d8a33) Signed-off-by: Nikita Kalyazin <kalyazin@amazon.com>
This metric accumulates the number of pending requests sitting in the Tx virtio queue while a request is being processed. This may give an insight at how sensible it would be to think of processing ingress traffic parallelly. (cherry picked from commit 3753f35) Signed-off-by: Nikita Kalyazin <kalyazin@amazon.com>
Codecov ReportAll modified and coverable lines are covered by tests ✅
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## firecracker-v1.7 #4490 +/- ##
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+ Coverage 81.63% 81.65% +0.01%
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Files 243 243
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+ Hits 24329 24360 +31
Misses 5474 5474
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- block/net file/tap access latencies - block/net virtio queue backlog lengths (cherry picked from commit 448df60) Signed-off-by: Nikita Kalyazin <kalyazin@amazon.com>
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Changes
Backporting extra IO metrics (#4486) from main.
Reason
We would like for them to appear in prod as soon as possible.
License Acceptance
By submitting this pull request, I confirm that my contribution is made under
the terms of the Apache 2.0 license. For more information on following Developer
Certificate of Origin and signing off your commits, please check
CONTRIBUTING.md.PR Checklist
[ ] If a specific issue led to this PR, this PR closes the issue.PR.
[ ] API changes follow the Runbook for Firecracker API changes.CHANGELOG.md.[ ] All added/changed functionality is tested.[ ] NewTODOs link to an issue.contribution quality standards.
rust-vmm.