From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.github.com (out-17.smtp.github.com [192.30.252.200]) by mail.toke.dk (Postfix) with ESMTPS id C9F7A7B8309 for ; Tue, 15 Dec 2020 01:12:01 +0100 (CET) Authentication-Results: mail.toke.dk; dkim=pass (1024-bit key) header.d=github.com header.i=@github.com header.b=VJ+xNenz Received: from github.com (hubbernetes-node-1b2ad01.va3-iad.github.net [10.48.16.74]) by smtp.github.com (Postfix) with ESMTPA id 74FBB5C056C for ; Mon, 14 Dec 2020 16:12:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1607991120; bh=UZLQUrm0aiplq3OBupUlLbwYi/ovdYgZVCQ6cKyYzFU=; h=Date:From:Reply-To:To:Cc:Subject:List-ID:List-Archive:List-Post: List-Unsubscribe:From; b=VJ+xNenzqcVrW3QS3/Rag0PP8h3lnyTkzwMVkeKaH5SKhp7J2HE4uqKmHZJtgvgkd 4bjsgecuhCtiJlggByiw5ZxTyj9jDFCb8yUq99XNpB9p/fDcwTEVyNrQD5aqXAN/2h KYCSY71jKMtr9QDJEH9oXw3Um8ZoQnCMiIW06HK4= Date: Mon, 14 Dec 2020 16:12:00 -0800 From: olg33 To: tohojo/flent Message-ID: Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="--==_mimepart_5fd7ff5071c7d_5e19b4876f3"; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: list X-GitHub-Sender: olg33 X-GitHub-Recipient: flent-users X-GitHub-Reason: subscribed X-Auto-Response-Suppress: All X-GitHub-Recipient-Address: flent-users@flent.org Message-ID-Hash: CWEJB3L5EHFC6OPFGMFQXZ7CKXGQIKKR X-Message-ID-Hash: CWEJB3L5EHFC6OPFGMFQXZ7CKXGQIKKR X-MailFrom: noreply@github.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; suspicious-header CC: Subscribed X-Mailman-Version: 3.3.2 Reply-To: tohojo/flent Subject: [Flent-users] [tohojo/flent] rrul tests are not being able to saturate link (#218) List-Id: Flent discussion list Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: ----==_mimepart_5fd7ff5071c7d_5e19b4876f3 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi, We are installing a new satellite link and we are using flent to run bandwidth testing. The idea is to saturate the link with marked and unmarked packets. However initial results show that the test was not able to reach the maximum bandwidth downstream supported by the link which is about 60Mbps. For unmarked traffic we ran the following test: `flent rrul -H 10.111.40.252` For marked traffic we used the following test: `flent rrul_var -H 10.111.40.252 --test-parameter bidir_streams=5 --test-parameter markings=11,13,15,19,21 ` On both cases we reached no more than 50% of the link capacity. To rule out any problem with the link itself, we ran the following test: `flent tcp_12down -H 10.111.40.252` This time. we were able to reach saturation levels (60Mbps) of downstream traffic. Also ran iperf3 and obtained the same results Do you see any reason why the rrul and rrul_var tests aren't being able to generate enough traffic to saturate the link? Maybe any parameter I'm missing or something? Or maybe that's normal, anyhow, I'd appreciate any comment on this matter. Thanks. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/tohojo/flent/issues/218 ----==_mimepart_5fd7ff5071c7d_5e19b4876f3 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit

Hi,

We are installing a new satellite link and we are using flent to run bandwidth testing. The idea is to saturate the link with marked and unmarked packets.

However initial results show that the test was not able to reach the maximum bandwidth downstream supported by the link which is about 60Mbps.

For unmarked traffic we ran the following test:
flent rrul -H 10.111.40.252

For marked traffic we used the following test:
flent rrul_var -H 10.111.40.252 --test-parameter bidir_streams=5 --test-parameter markings=11,13,15,19,21

On both cases we reached no more than 50% of the link capacity.

To rule out any problem with the link itself, we ran the following test:
flent tcp_12down -H 10.111.40.252

This time. we were able to reach saturation levels (60Mbps) of downstream traffic. Also ran iperf3 and obtained the same results

Do you see any reason why the rrul and rrul_var tests aren't being able to generate enough traffic to saturate the link? Maybe any parameter I'm missing or something? Or maybe that's normal, anyhow, I'd appreciate any comment on this matter.

Thanks.

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