[Cake] [Bloat] [Starlink] Announcing the LibreQoS Bufferbloat TestPlatform

Sun Jun 15 13:32:20 EDT 2025

Very cool Frank!

When I run it, it says all of my latency is 0.0ms.  This
is firefox-139.0.1 on NixOS unstable.

I guess soem of the CORS headers are screwed up?
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the
remote resource at https://test-elp.libreqos.com:8005/ping?cb=242578.
(Reason: CORS request did not succeed). Status code: (null).

I don't know, I guess you probably _do_ want these objects to be
cacheable via the CDN?

GET /ping?cb=819806 HTTP/1.1
Host: test-elp.libreqos.com:8005
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:139.0) Gecko/20100101
Firefox/139.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br, zstd
Pragma: no-cache
Cache-Control: no-store, no-cache, must-revalidate
X-Priority: high
X-Ping-Attempt: 0
Referer: https://test.libreqos.com/
Origin: https://test.libreqos.com
Connection: keep-alive
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: same-site

HTTP/1.1 200 OK
date: Sun, 15 Jun 2025 17:13:55 GMT
server: uvicorn
cache-control: no-store, no-cache, must-revalidate
pragma: no-cache
x-ping-server: dedicated
x-priority-processed: true
x-ping-timeouts-seen: 0
content-length: 4
content-type: text/plain; charset=utf-8
access-control-allow-origin: *
access-control-allow-credentials: true

Your Nginx server also can have caching enabled for the favorite icon, and
the javascript, which should make it faster to load.

HTTP/2 200
server: nginx/1.18.0 (Ubuntu)
date: Sun, 15 Jun 2025 17:13:35 GMT
content-type: text/javascript; charset=utf-8
vary: Accept-Encoding
last-modified: Tue, 10 Jun 2025 04:28:53 GMT
strict-transport-security: max-age=63072000
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
content-encoding: gzip
X-Firefox-Spdy: h2

I've found that you can set the caching for the CORS "preflight" requests
too and it definitely helps. e.g. access-control-max-age 345600

On Sun, Jun 15, 2025 at 9:53 AM Nils Andreas Svee via Cake <
cake at lists.bufferbloat.net> wrote:

> Just tried it too: https://imgur.com/a/F2cNZd4, also getting A+ overall,
> and "only" A for bidirectional.
>
> I seem to be getting a 200+ ms spike right at the beginning of the
> baseline test, which skews the results.
> This happened at least on a couple of tests, but after a few tries it got
> better. At least with ICMP ping separately I don't see any spikes like that.
>
> Best Regards
> Nils
>
> On Sun, Jun 15, 2025, at 23:20, the keyboard of geoff goodfellow via Bloat
> wrote:
>
> re: *thoughts and feedback!*
>
> your https://test.libreqos.com tests of [Single User Test] & [Virtual
> Household Mode] both give yours truly bufferbloat grades of *A+ *
>
> whereas the https://www.waveform.com/tools/bufferbloat test gives yours
> truly a bufferbloat brade grade of *C*
>
>
> https://www.waveform.com/tools/bufferbloat?test-id=b13810f2-e999-4045-8e8b-ab3ab8b957c5
>
> #1.) Why/What's the difference?
>
> #2.) Who/Which one to believe¿
>
> g
>
>
> On Sun, Jun 15, 2025 at 4:58 AM Frantisek Borsik via Starlink <
> starlink at lists.bufferbloat.net> wrote:
>
> Hello to all,
>
> We're excited to announce the release of the *LibreQoS Bufferbloat Test*
> – an open-source bufferbloat testing solution designed specifically for
> ISPs and network operators to deploy for their customers.
>
> *Link*
> https://test.libreqos.com
>
> *What Makes This Different*
>
> While there are several bufferbloat testing tools available, this platform
> addresses a critical gap: ISP-deployable infrastructure that provides both
> traditional testing and realistic household simulation.
>
> As Dave Täht highlighted in his influential article "What's Wrong with
> Speed Tests" <https://blog.cerowrt.org/post/speedtests/>, traditional
> speed tests fail to measure what users actually experience. We tried to
> address Dave's points to make a better speed test that focuses on the
> metric that matters: latency under load in realistic usage scenarios.
>
> *Two Complementary Test Modes*
>
> *Single User Test Mode*
>
>    - Traditional sequential load testing (baseline → download → upload →
>    bidirectional)
>    - Measures working latency and jitter during each phase
>    - Familiar A+ to F grading based on latency under load increases
>    - Comparable to existing tools like DSLReports Speed Test and Waveform
>    Bufferbloat Test
>
>
> *Virtual Household Mode (The Innovation)*
>
> Process-isolated simulation of 4 concurrent users with authentic traffic
> patterns:
>
>    - Alex (Gaming): 1.5 Mbps constant, jitter-sensitive for competitive
>    gaming
>    - Sarah (Video Conference): 2.5 Mbps bidirectional, Teams simulation
>    with working latency monitoring
>    - Jake (Netflix HD): 25 Mbps bursts (1s on, 4s off), realistic
>    streaming patterns
>    - Computer (Background): Up to 200 Mbps continuous download, system
>    updates
>
>
> Real-world relevance: Tests latency under load when multiple family
> members are online simultaneously
>
> Advanced grading: Network fairness, jitter measurement, and per-user
> working latency analysis
>
> *Why (not only) ISPs Need This*
>
> *The traditional approach of sending customers to third-party speed test
> sites has limitations:*
>
>    - No control over test methodology or server placement
>    - Limited correlation with customer support tickets
>    - Generic results that don't reflect real-world usage patterns
>    - No integration with ISP operational systems
>
> *This platform enables (not only) ISPs to:*
>
>    - Host their own testing infrastructure with full control
>    - Integrate with support systems via telemetry APIs
>    - Provide customers with realistic household testing scenarios
>    - Correlate test results with network performance and customer
>    complaints
>
>
> *Open Source & Community*
>
> The entire platform is open source and available here:
> https://github.com/LibreQoE/bufferbloat_test
>
> We've designed this to be:
>
>    - Easy to deploy for (not only) ISPs of any size
>    - Scientifically meaningful in its measurement methodology
>    - Realistic in its simulation of actual household usage
>    - Integrable with existing ISP operational workflows
>
>
>
> *Community Feedback Requested*
> We'd love feedback from the bufferbloat.net community on:
>
>    - Test methodology: Are we measuring the right metrics?
>    - Grading thresholds: Do our A+ to F grades align with real-world
>    impact?
>    - Virtual household scenarios: What other realistic usage patterns
>    should we simulate?
>    - ISP adoption: What barriers exist for ISP deployment?
>
>
>
> *Technical Discussion*
> We'd welcome discussion about:
>
>    - Measurement accuracy for working latency and jitter in virtual
>    household mode
>    - Traffic pattern authenticity (gaming, video conferencing, streaming)
>    - Grading methodology for latency under load in complex multi-user
>    scenarios
>    - Integration approaches for ISP operational systems
>
>
> The platform represents our attempt to bridge the gap between academic
> bufferbloat research and practical ISP operations, building on the
> foundational work of researchers like Dave Täht and the broader bufferbloat
> community. We believe that widespread ISP deployment of proper bufferbloat
> testing infrastructure will ultimately benefit the entire internet
> ecosystem.
>
>
> *Looking forward to the community's thoughts and feedback!*
> Best regards,
>
> The LibreQoS Team
>
>
> *In loving memory of Dave Täht: *1965-2025
>
> https://libreqos.io/2025/04/01/in-loving-memory-of-dave/
>
>
> https://www.linkedin.com/in/frantisekborsik
>
> Signal, Telegram, WhatsApp: +421919416714
>
> iMessage, mobile: +420775230885
>
> Skype: casioa5302ca
>
> frantisek.borsik at gmail.com
> _______________________________________________
> Starlink mailing list
> Starlink at lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/starlink
>
>
>
> --
> Geoff.Goodfellow at iconia.com
>
> living as The Truth is True
>
> _______________________________________________
> Bloat mailing list
> Bloat at lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/bloat
>
>
> _______________________________________________
> Cake mailing list
> Cake at lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/cake
>

-- 
Regards,
Dave Seddon
+1 415 857 5102
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