From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-23.smtp.github.com (out-23.smtp.github.com [192.30.252.206]) by mail.toke.dk (Postfix) with ESMTPS id 6919D7D277B for ; Mon, 25 Jan 2021 13:04:01 +0100 (CET) Authentication-Results: mail.toke.dk; dkim=pass (1024-bit key) header.d=github.com header.i=@github.com header.b=NjNj5Otp Received: from github.com (hubbernetes-node-32e1ac2.ac4-iad.github.net [10.52.25.71]) by smtp.github.com (Postfix) with ESMTPA id 8E6FB600C5E for ; Mon, 25 Jan 2021 04:04:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1611576240; bh=63SdP+TMucbtLdR1wwQ7ofAVNzHkW+9iBTTTNAu8Akw=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=NjNj5OtpOy0IfoKx8a+IWCDTQmb3LEhqih7WI8GpqVIshe7VCORZgsNj+Pt/vmcUj L/rFMzd1tCb4kkE8gMQD9T3aGegE24GtamyS6qjaAEJ5AsKNdPEGhewzasaMIQWTyw 8RKfJ4EFG+5/Y695nJVOYL+f5zwBcMlebbDH1OKI= Date: Mon, 25 Jan 2021 04:04:00 -0800 From: =?UTF-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2Vu?= To: tohojo/flent Message-ID: In-Reply-To: References: Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="--==_mimepart_600eb3b08b9d0_531a0412834e"; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: list X-GitHub-Sender: tohojo 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: RCRVGGJCTWATZ2OEIYWWGQR7272CGFG3 X-Message-ID-Hash: RCRVGGJCTWATZ2OEIYWWGQR7272CGFG3 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] Re: [tohojo/flent] support for flowgrind (#219) List-Id: Flent discussion list Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: ----==_mimepart_600eb3b08b9d0_531a0412834e Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Jonas Smedegaard writes: > the tool flowgrind seems like it might be an interesting backend for > flent to support: https://github.com/flowgrind/flowgrind > > From its README: > >> Unlike most cross-platform testing tools, flowgrind can output some >> transport layer information, which are usually internal to the TCP/IP >> stack. For example, on Linux and FreeBSD this includes among others >> the kernel's estimation of the end-to-end RTT, the size of the TCP >> congestion window (CWND) and slow start threshold (SSTHRESH). These values Flent can already extract (using the 'ss' tool). Just enable --socket-stats :) Also from its README: > In contrast to similar tools like iperf or netperf it features a > distributed architecture, where throughput and other metrics are > measured between arbitrary flowgrind server processes. ...which makes me suspect it's not a very good fit for Flent. -- 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/219#issuecomment-766769369 ----==_mimepart_600eb3b08b9d0_531a0412834e Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit

Jonas Smedegaard <notifications@github.com> writes:

> the tool flowgrind seems like it might be an interesting backend for
> flent to support: https://github.com/flowgrind/flowgrind
>
> From its README:
>
>> Unlike most cross-platform testing tools, flowgrind can output some
>> transport layer information, which are usually internal to the TCP/IP
>> stack. For example, on Linux and FreeBSD this includes among others
>> the kernel's estimation of the end-to-end RTT, the size of the TCP
>> congestion window (CWND) and slow start threshold (SSTHRESH).

These values Flent can already extract (using the 'ss' tool). Just
enable --socket-stats :)

Also from its README:

> In contrast to similar tools like iperf or netperf it features a
> distributed architecture, where throughput and other metrics are
> measured between arbitrary flowgrind server processes.

...which makes me suspect it's not a very good fit for Flent.

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