* Registry: limit the text output on unexpected status code
* pullBlob(): limit channel read-out on error to 4 KiB
* No need to always read channel until end
This was introduced in https://github.com/cirruslabs/tart/pull/284
because we were blocking in "urlSession(_ session: URLSession, dataTask:
URLSessionDataTask, didReceive data: Data)", which we don't do anymore.
* Fetcher.fetch(): remove "progress" argument as we don't need it anymore
Otherwise we start to periodically get RST's from GitHub, possibly
because of too many connection opens, which has an effect of cancelling
previously received bytes.
These RST's can be observed in tcpdump/Wireshark or Console, emitted
from the libusrtcp.dylib library, com.apple.network subsystem, for the
Tart process:
>tcp_input [C59.1.1.1:3] flags=[R] seq=1805021659, ack=0, win=0 state=CLOSED rcv_nxt=1805021659, snd_una=1752355607
You can also observe the "Received Bytes" in "Activity Monitor" for
the Tart process while pulling ghcr.io/cirruslabs/macos-runner:sequoia,
and this value will periodically decrease.
* DiskV2: avoid allocating zero chunk on each zeroSkippingWrite() call
* Increase hole granularity size from 64 KiB to 4 MiB
* Fetcher: never write to disk, thanks to URLSessionDataDelegate
* Get a fresh instance of executor for each benchmark invocation
And don't pre-initialize all of the executors at once, as this
might reach the maximum number of VMs limit in case we want to
test multiple Tart executors.
* Run benchmarks on Tart with different --root-disk-opts options
* Fix TestTart
* benchmark fio: introduce --prepare command-line argument
To be able to specify --prepare='sudo purge && sync', similarly to
Hyperfine[1].
[1]: https://github.com/sharkdp/hyperfine
* Benchmark Tart with --root-disk-opts=caching=cached separately too
* Add Ars Technica recommended benchmarks
* Tart executor: log SSH session standard output and standard error
* Reduce file I/O size from 16 to 10 GB to avoid "No space left on device"
* Remove random writing tests to make space for more read/read-write tests
* Add some "randrw"-style fio benchmarks
* Show latency in benchmark results
* Add sync benchmark and show read/write/sync latency
* README.md: add new benchmark results
Was looking into performance and was wondering about Game Mode on Sonoma.
This change is unrelated. Just found they have a category for tools like Tart.
To make sure we won't prune then immediately after. Useful for when scenarios similar to Cirrus CLI when we make sure that several images are up-to-date before every request for task execution.
* Revert "Lowercase `tart.app` (#751)"
This reverts commit a9e2a19015.
* Optimize DiskV2 deduplication logic
In case we cloned `disk.img` from a local image, check if data at offset has the expected contents already.
* Hole punch only if needed
* Calculate hash only if needed
* subdataChunks optimization
* Reapply "Lowercase `tart.app` (#751)"
This reverts commit e74e9c845a.
* format
* Save at least 1GB on deduplication logic
* Build separately
* Revert "subdataChunks optimization"
This reverts commit e59382aeba.
* Another optimization
* Removed debug log
* reformat
* Revert "Hole punch only if needed"
This reverts commit 8c569fc5
* VZDiskImageSynchronizationMode's "description" field is a dead code
* Re-use the VZDiskImageSynchronizationMode extension
* tart run: replace --sync with --root-disk-opts
* VM: support root disk synchronization mode on macOS
* Support setting root disk synchronization mode
Adds a new VMConfig parameter (tart get / tart set) called 'sync' which
can be set to 'full' (default), 'fsync', or 'none', corresponding with
the values of VZDiskImageSynchronizationMode and allowing a tradeoff
between data integrity and speed.
* Remove unused import
* Fix formatting
* Make root disk sync behaviour a commandline option
