Date: Sun, 19 Nov 2023 04:01:01 +0900 From: Tomoaki AOKI <junchoon@dec.sakura.ne.jp> To: tuexen@freebsd.org Cc: freebsd-current@freebsd.org Subject: Re: Request for Testing: TCP RACK Message-ID: <20231119040101.503d44475182e9721081179e@dec.sakura.ne.jp> In-Reply-To: <B885D7C1-78CE-490C-98F3-6AA43E575558@freebsd.org> References: <42C327BD-6CE4-43AA-A1AE-3BEC08D623DB@freebsd.org> <ZVdquxLWZcpQrqUQ@int21h> <bc2348d5dd718f1bbbf723cd795d7c7f@Leidinger.net> <2bbfcf68-3249-45c7-a8e5-af7115a1ccfe@gmail.com> <C25A2799-6764-440A-9E5E-77665C03E974@freebsd.org> <20231118083704.3ebc17eb8f392ceae33f65f7@dec.sakura.ne.jp> <B885D7C1-78CE-490C-98F3-6AA43E575558@freebsd.org>
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On Sat, 18 Nov 2023 09:50:43 +0100 tuexen@freebsd.org wrote: > > On Nov 18, 2023, at 00:37, Tomoaki AOKI <junchoon@dec.sakura.ne.jp> wrote: > > > > On Fri, 17 Nov 2023 18:51:05 +0100 > > tuexen@freebsd.org wrote: > > > >>> On Nov 17, 2023, at 17:06, Johan Hendriks <joh.hendriks@gmail.com> wrote: > >>> > >>> I am running the rack stack for quiet some time now on a baremetal machiene and never had problems. > >>> Also use pf. This is a test machine so not a lot happening on it. > >>> > >>> Are there any thing we can test? Do we have some test scripts we can run? > >> We are actually interested in feedback about using the stack in whatever > >> use case you use TCP for. The stack has been tested with the Netflix use > >> case, but not so much with others. That is why we ask for broader testing. > >> > >> Best regards > >> Michael > > > > Are there any difference regarding with performance between main and > > stable/14? If so, please ignore below. > > > > I have stable/14 environment which is configured to be able to switch > > to TCP RACK and experienced huge performance loss when writing > > a large file to smbfs share on commercial NAS. CC is cubic. > > Testing large archive on the smbfs share doesn't seem to be > > affected. > > > > Comparison between default (freebsd) and rack TCP stack using > > sysutils/clone on stable/14 at commit 7d1321288ad9, amd64. > > Last 3 lines of outputs from clone (upload to NAS) are shown. > Thank you very much for testing. This is what we are looking > for. Would it be possible to repeat the test using NewReno as > the CC? > > Best regards > Michael Sure. Here we go! sysctl net.inet.tcp.functions_default net.inet.tcp.functions_default: freebsd sysctl net.inet.tcp.cc.algorithm net.inet.tcp.cc.algorithm: newreno Umounted and remounted smbfs share. 1 item copied, 2343.1 MB in 37.65 s -- 62.2 MB/s Leaked memory: 0 bytes No errors occured. sysctl net.inet.tcp.functions_default net.inet.tcp.functions_default: rack Umounted and remounted smbfs share. 1 item copied, 2343.1 MB in 905.17 s -- 2.6 MB/s Leaked memory: 0 bytes No errors occured. sysctl net.inet.tcp.functions_default net.inet.tcp.functions_default: freebsd Without umount and remount to reproduce previous oddness, maybe caused by keep-alive. 1 item copied, 2343.1 MB in 897.67 s -- 2.6 MB/s Leaked memory: 0 bytes No errors occured. Umounted and remounted, without change for CC and TCP stack. 1 item copied, 2343.1 MB in 37.43 s -- 62.6 MB/s Leaked memory: 0 bytes No errors occured. All test are proceeded simultaneously. So the last one is with CC=newreno and TCP stack=freebsd. Not exactly recorded, but testing transferred file by diff -u -p -N was roughly 30MB/sec, while roughly 25MB/sec with CC=cubic. > > > > Before switching to rack: > > 1 item copied, 2342.4 MB in 39.12 s -- 59.9 MB/s > > Leaked memory: 0 bytes > > No errors occured. > > > > Unmount the smbfs share, switch to rack, and after remount: > > 1 item copied, 2342.4 MB in 926.59 s -- 2.5 MB/s > > Leaked memory: 0 bytes > > No errors occured. > > > > Switch back to freebsd (default) without unmounting: > > 1 item copied, 2342.4 MB in 906.94 s -- 2.6 MB/s > > Leaked memory: 0 bytes > > No errors occured. > > > > Unmount and remount the smbfs share: > > 1 item copied, 2342.4 MB in 39.12 s -- 59.9 MB/s > > Leaked memory: 0 bytes > > No errors occured. > > > > > > Regards. > > > > -- > > Tomoaki AOKI <junchoon@dec.sakura.ne.jp> -- Tomoaki AOKI <junchoon@dec.sakura.ne.jp>
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