Bug 34982
| Summary: | iwl4965: very bad performance after update to 2.6.35 | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | Stanislaw Gruszka (stf_xl) |
| Component: | network-wireless | Assignee: | Stanislaw Gruszka (stf_xl) |
| Status: | CLOSED INSUFFICIENT_DATA | ||
| Severity: | normal | CC: | adam, asl-kernel, florian, pierre-bugzilla |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.35 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: |
iwlagn_force_cts_to_self_protection.patch
Patch on 2.6.37 p1 p2 p3 p4 p5 |
||
|
Description
Stanislaw Gruszka
2011-05-12 11:11:03 UTC
There are still performance problems on 4965, what need to be solved. Arnaud, I will provide some test patches soon. Created attachment 57572 [details]
iwlagn_force_cts_to_self_protection.patch
This use cts-to-self protection of aggregated frames, like it was in 2.6.34. Patch is on top of 2.6.35.13. It is small, so could be easily applied by hand on any other kernel version (up to 2.6.38). It helps on my setup with 5300 performance, not sure it would help in case of 4965.
Please test (with previous fix of course). If it does not help, I will provide a few patches that apply on top of 2.6.35-rc1 and convert driver to 2.6.34 level. Then we could see which patch fix things and process problem further.
Can we get test results of the patch? I can not reproduce problem, I have 7MB/s on 2.4GHz and 9MB/s on 5GHz network here with 4965 device. Created attachment 59422 [details] Patch on 2.6.37 Didn't like my 2.6.37 :) pomme iwlwifi # patch -p5 <~/patch.cts.patch patching file iwl-agn.c Hunk #1 FAILED at 200. Hunk #2 FAILED at 3335. Hunk #3 FAILED at 3348. Hunk #4 succeeded at 3790 with fuzz 2 (offset 420 lines). 3 out of 4 hunks FAILED -- saving rejects to file iwl-agn.c.rej patching file iwl-core.c Hunk #1 FAILED at 1908. 1 out of 1 hunk FAILED -- saving rejects to file iwl-core.c.rej Patch on it enclosed, hope it's good, I had to modify the priv-> to a ctx -> (first hunk) Anyway it's still (very) bad. It's a bit better when mixed with the previous patch on iwl-agn-tx.c ( "If this frame is broadcast or management, use broadcast station id" ), but it's around 1.22MB/s without it, 1.6/1.8MB/s with it. ssh still feels like it's loosing packets. Linux pomme 2.6.37-gentoo-r4 #3 SMP Wed May 25 17:20:14 CEST 2011 x86_64 Intel(R) Core(TM)2 Duo CPU T7100 @ 1.80GHz GenuineIntel GNU/Linux 03:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection (rev 61) hardware: "IBM Lenovo" Thinkpad R61, 8918-5WG: http://www-307.ibm.com/pc/support/site.wss/quickPath.do?quickPathEntry=89185WG Your patch is fine, so this is different problem. Below I'll attach 5 patches on top of 2.6.35.12 (need to build and install that version to test), that revert driver to 2.6.34 level + some minor mac80211 patches. I'm asking you to test them one by one and tell after which one the bug fix. If after last patch bug will still persist, that mean the problem is somewhere else i.e in mac80211 or net stack. First patch contains fix we have already - that brings speed from 0.1 to 1.2 MB/s. Created attachment 59522 [details]
p1
Created attachment 59532 [details]
p2
Created attachment 59542 [details]
p3
Created attachment 59552 [details]
p4
Created attachment 59562 [details]
p5
Hi, bugzilla.kernel.org is back :-) Arnaud, please install 2.6.35.12 and apply each of pX patches one by one and tell us after which one problem gone (if it gone, if not gone after p5, this will be a mac80211 or other subsystem problem). Otherwise this bug will not be fixed. Oh, you may want to check the latest kernel (3.3-rc1) before applying the patches, it contains various iwlegacy patches, which by a chance could fix this issue. Without patches testing this bug will not be fixed. Hello, Unfortunately I can no longer test it, the R61 died some months ago. I now have a T530 which just work... Sorry :( |