From nobody Mon Aug 28 10:48:42 2023 X-Original-To: freebsd-hackers@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4RZ6kc2j4Vz4rPxx for ; Mon, 28 Aug 2023 10:49:28 +0000 (UTC) (envelope-from mad@madpilot.net) Received: from mail.madpilot.net (vogon.madpilot.net [159.69.1.99]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4RZ6kb6kDWz3WV3 for ; Mon, 28 Aug 2023 10:49:27 +0000 (UTC) (envelope-from mad@madpilot.net) Authentication-Results: mx1.freebsd.org; none Received: from mail (mail [IPv6:fd5c:5351:d272::3]) by mail.madpilot.net (Postfix) with ESMTP id 4RZ6jr0Y3gz6db4; Mon, 28 Aug 2023 12:48:48 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=madpilot.net; h= content-transfer-encoding:content-type:content-type:in-reply-to :from:from:content-language:references:subject:subject:date:date :message-id:received; s=bjowvop61wgh; t=1693219725; x= 1695034126; bh=HAIbijX05yNTfUIGnieYtzOFnr+EbcuheQZJb7Q+2yk=; b=k SE/Acxx9YECBvru/pf2KjGWy8tzkG/+5R7F+e+1/d81tbg1KoUIw5E/WqMHUQYrW 8D1Te+w1++G1idAf0Mc6iGeBcWfn+pW0UxBBVXBO7peob4+w6VPHNWqlLy7dTt9i lNr0925g6PbTeJquN+LlapmDt5pk5IdaP/uTHMSP9wCc4OW9rtwKhey7tmXoEZ1s Kt/+y+IzMdX8B0fAbppxDtTyMuSw43uNkO8qZYaBHFDL6dcGkYT0ZPL0FOrsJuM+ O+XmxYIZ461kNwZRMWxI3fN4u3+lmqb4xrlrZ0QrjOYNQLONoO1FE6/U5LgH9dXL VNDLhRv9O86ysVlja1rIw== Received: from mail.madpilot.net ([IPv6:fd5c:5351:d272::3]) by mail (mail.madpilot.net [IPv6:fd5c:5351:d272::3]) (amavisd-new, port 10026) with ESMTP id AFYdilZvaw4b; Mon, 28 Aug 2023 12:48:45 +0200 (CEST) Message-ID: <455dc69a-dd15-18d9-8e93-91bbff3997e4@madpilot.net> Date: Mon, 28 Aug 2023 12:48:42 +0200 Subject: Re: Very slow scp performance comparing to Linux To: Wei Hu , Mikhail Zakharov , "freebsd-hackers@freebsd.org" References: <6952b7fd-f90f-2677-1997-d0c708cb559e@yahoo.com> Content-Language: en-US From: Guido Falsi In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4RZ6kb6kDWz3WV3 X-Spamd-Bar: ---- X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:24940, ipnet:159.69.0.0/16, country:DE] List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org On 28/08/23 12:03, Wei Hu wrote: > Hi Mike, > > All VMs are with same type and they are in Azure. If the copy on Linux is being cached on the RX side, so is FreeBSD? > You could perform the test using files in memory filesystems (tmpfs or the like). This would factor out disk performance whatever the backend. -- Guido Falsi