lib/connections: Use adaptive write size for rate limited connections (fixes #8630) #8631
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er-pa
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Nov 3, 2022
calmh
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Nov 8, 2022
* main: (36 commits) lib/protocol: Ignore inode time when xattr&ownership is ignored (fixes syncthing#8654) (syncthing#8655) lib/fs: Try to remove read only Windows files (fixes syncthing#3744) (syncthing#8650) gui: Add copy to clipboard, share by email, and share by SMS buttons to device IDs (fixes syncthing#2771, ref syncthing#3868) (syncthing#7984) gui, man, authors: Update docs, translations, and contributors build: Add GitHub actions build for Windows (syncthing#8627) gui: Fix connection type icon width (fixes syncthing#8592) (syncthing#8644) gui: Adjust connection type icon size scaling and alignment (syncthing#8645) docker: Use healthcheck endpoint (syncthing#8640) lib/connections: Use adaptive write size for rate limited connections (fixes syncthing#8630) (syncthing#8631) gui: Mark devices that haven't connected for a long time (fixes syncthing#7703) (syncthing#8530) gui: Fix rescan interval when add encrypted folder with watch for changes enabled (fixes syncthing#8570) (syncthing#8571) gui: Always show Out of Sync Items for remote devices (syncthing#8632) lib/fs: Let xattr test avoid non-test attributes (fixes syncthing#8601) (syncthing#8628) build: Add GitHub actions build for Windows gui, man, authors: Update docs, translations, and contributors gui: Display folder and device count number (syncthing#8615) gui, man, authors: Update docs, translations, and contributors lib/model, lib/protocol: Fix file comparisons (fixes syncthing#8594) (syncthing#8603) lib/scanner: More sensible debug output (syncthing#8596) gui: Allow automatic device ID selection on WebKit browsers (ref syncthing#8544) (syncthing#8597) ...
calmh
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Nov 22, 2022
* main: (23 commits) lib/fs: Optimize WindowsInvalidFilename (syncthing#8687) gui, man, authors: Update docs, translations, and contributors cmd/syncthing: Use main logger in generate subcommand (fixes syncthing#8682) (syncthing#8685) build: Update all dependencies (fixes syncthing#8679) (syncthing#8680) gui, man, authors: Update docs, translations, and contributors lib/model: Correctly set xattrs on temp files (fixes syncthing#8667) (syncthing#8670) gui: Automatically dismiss authentication reminder when in LDAP mode (fixes syncthing#8661) (syncthing#8663) lib/model: Correctly handle xattrs on directories (fixes syncthing#8657) (syncthing#8658) lib/protocol: Ignore inode time when xattr&ownership is ignored (fixes syncthing#8654) (syncthing#8655) lib/fs: Try to remove read only Windows files (fixes syncthing#3744) (syncthing#8650) gui: Add copy to clipboard, share by email, and share by SMS buttons to device IDs (fixes syncthing#2771, ref syncthing#3868) (syncthing#7984) gui, man, authors: Update docs, translations, and contributors build: Add GitHub actions build for Windows (syncthing#8627) gui: Fix connection type icon width (fixes syncthing#8592) (syncthing#8644) gui: Adjust connection type icon size scaling and alignment (syncthing#8645) docker: Use healthcheck endpoint (syncthing#8640) lib/connections: Use adaptive write size for rate limited connections (fixes syncthing#8630) (syncthing#8631) gui: Mark devices that haven't connected for a long time (fixes syncthing#7703) (syncthing#8530) gui: Fix rescan interval when add encrypted folder with watch for changes enabled (fixes syncthing#8570) (syncthing#8571) gui: Always show Out of Sync Items for remote devices (syncthing#8632) ...
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This is a best guess of what might be wrong in the issue in question, and an attempt to fix it. I've verified it doesn't harm performance in my local tests, and done some prints on the write sizes to verify they are reasonable, but I can't verify that it solves the problem because I haven't reproduced the problem.
That said, previously we'd do 8 KiB writes, which for 100 MB/s which is 12800 writes per second -- a lot of syscalls, and less opportunity for the TCP stack to send large segments maybe. Now we up the size to much larger for high rates, letting the lower layers do their thing in peace. This should improve things.