MT7615 slow RX performance with pre-calib enabled
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- Dominant language
- C
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Description
I am using WRC-2533GST2 with latest 21.02 snapshot (MT7621A + MT7615N*2). Thanks for developers, both 2.4GHz and 5GHz connections are stable.
The problem is 2.4GHz RX is slow. TX is about 110Mbps, which is almost same as stock firmware. But RX is about 30 ~ 40Mbps, when stock firmware gets 110Mbps.
$ iw wlan0 station dump
shows rx bitrate is only 52Mbps though tx bitrate is 144Mbps.
iw_stationdump.txt
I enabled online-calibration by the patch attached, then RX speed becomes 110Mbps.
What is the cause? Is there anyone having same problem ?
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reviewing the attached iw station dump and 203-disable-pre-calib.patch.txt, then trace the MT7615 calibration behavior involved in the reported 2.4GHz RX difference. Reproduce the RX/TX measurements with pre-calibration enabled and with the patch applied; done means the cause is explained and the regression is fixed or clearly documented.
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Assessment
- Tech stack
- c
- Domain
- networking
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100