From owner-freebsd-hackers@freebsd.org Mon Jan 13 19:51:03 2020 Return-Path: Delivered-To: freebsd-hackers@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 044851EA764 for ; Mon, 13 Jan 2020 19:51:03 +0000 (UTC) (envelope-from wojtek@puchar.net) Received: from puchar.net (puchar.net [194.1.144.90]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 47xPN60gGpz46QM for ; Mon, 13 Jan 2020 19:51:01 +0000 (UTC) (envelope-from wojtek@puchar.net) Received: Received: from 127.0.0.1 (localhost [127.0.0.1]) by puchar.net (8.15.2/8.15.2) with ESMTPS id 00DJovUk059022 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 13 Jan 2020 20:50:57 +0100 (CET) (envelope-from puchar-wojtek@puchar.net) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=puchar.net; s=default; t=1578945057; bh=8dqfMH8H5OtbB0NhxDa3NEHzFddb6e6UhCk/VMvJtas=; h=Date:From:To:cc:Subject:In-Reply-To:References; b=a287ihDlw8tqC6BphESqu4/sWE7Q7+t3PqNKx/K79AKW1E8TQXy9WBRNTwir6ovZl mmpAhwCYnjAD7caW3N0gGfBKPfBK2YM1IziNtz/BgVfGA4/eaehP/VGqCG8lAE4eFd m3x3hBDW+V3c6zaRTessIkkR6p5uwpjJz6WEW0V8= Received: from localhost (puchar-wojtek@localhost) by puchar.net (8.15.2/8.15.2/Submit) with ESMTP id 00DJovV8059019; Mon, 13 Jan 2020 20:50:57 +0100 (CET) (envelope-from puchar-wojtek@puchar.net) Date: Mon, 13 Jan 2020 20:50:57 +0100 (CET) From: Wojciech Puchar To: Hans Petter Selasky cc: Wojciech Puchar , freebsd-hackers@freebsd.org Subject: Re: raspberry pi zero and SLOW USB HID In-Reply-To: <0c07d877-356f-6b46-c819-ffb327f0dfd4@selasky.org> Message-ID: References: <9f8ae63f-abe5-27d9-e6bf-3d0cc1d3d4f3@selasky.org> <0c07d877-356f-6b46-c819-ffb327f0dfd4@selasky.org> User-Agent: Alpine 2.20 (BSF 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed X-Rspamd-Queue-Id: 47xPN60gGpz46QM X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; dkim=fail (rsa verify failed) header.d=puchar.net header.s=default header.b=a287ihDl; dmarc=none; spf=pass (mx1.freebsd.org: domain of wojtek@puchar.net designates 194.1.144.90 as permitted sender) smtp.mailfrom=wojtek@puchar.net X-Spamd-Result: default: False [-4.09 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; R_SPF_ALLOW(-0.20)[+mx:c]; R_DKIM_REJECT(1.00)[puchar.net:s=default]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[puchar.net]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[puchar.net:-]; RCVD_IN_DNSWL_NONE(0.00)[90.144.1.194.list.dnswl.org : 127.0.10.0]; IP_SCORE(-2.79)[ip: (-7.38), ipnet: 194.1.144.0/24(-3.69), asn: 43476(-2.95), country: PL(0.07)]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:43476, ipnet:194.1.144.0/24, country:PL]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 13 Jan 2020 19:51:03 -0000 i have 1000 request per second on PC. and it's enough. but at most 100 on raspberry pi. Our interface wasn't designed for high data transfers, just to be easier usable in windoze (no need for driver installation). This raspberry pi setup is one of a kind hardware for special use. not for mass production. but the problem is that on raspberry pi it's 10 times slower to do hid ping-ponging. and it's too slow.