From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!mx02.eternal-september.org!feeder.eternal-september.org!news.glorb.com!Xl.tags.giganews.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!local2.nntp.dca.giganews.com!nntp.earthlink.com!news.earthlink.com.POSTED!not-for-mail NNTP-Posting-Date: Tue, 08 Dec 2015 07:02:31 -0600 From: Dennis Lee Bieber Newsgroups: comp.lang.ada Subject: Re: Does Raspberry Pi 2 have a working version of native GNAT Date: Tue, 08 Dec 2015 08:02:33 -0500 Organization: IISS Elusive Unicorn Message-ID: <9qkd6bl0t1gee67b0mto4o8p41osjq0lbt@4ax.com> References: <4beed873-c380-4dd4-bf4a-7af0bfbed032@googlegroups.com> <21c3ad49-ac2e-41bd-80cc-e28397119977@googlegroups.com> <87610adjk2.fsf@jester.gateway.pace.com> X-Newsreader: Forte Agent 6.00/32.1186 X-No-Archive: YES MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Usenet-Provider: http://www.giganews.com NNTP-Posting-Host: 108.73.119.149 X-Trace: sv3-D6PXeB0mzkdQnv65uqmcH2A6lyHcSdyqzYJ1zfkotlglWlm/Upbq2JKjSOaEPXp8T6WZTjstT0mQ78R!yJjlJcHur5jKN6JKyWoPeGZKzagZmAKpNr/isqc9sD+5S3PHSZJb2zvvR0K/vsJtizHSJO4NXcAz!Lqu6qGnJM784biuyndst09Md18hS X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 X-Original-Bytes: 3066 Xref: news.eternal-september.org comp.lang.ada:28703 Date: 2015-12-08T08:02:33-05:00 List-Id: On Tue, 8 Dec 2015 09:40:29 +0100, "Dmitry A. Kazakov" declaimed the following: >On Mon, 07 Dec 2015 13:40:13 -0800, Paul Rubin wrote: > >> "Dmitry A. Kazakov" writes: >>> use swap, e.g. compiling with -j0 switch, then RPi 2 freezes, no matter >>> which linux version. I believe the problem is with the SD card (any >>> vendor). >> >> There's apparently a big difference between card brands: >> >> http://www.midwesternmac.com/blogs/jeff-geerling/raspberry-pi-microsd-card > >Sure. I suspect that the more performant is the card the worse. E.g. some >mp3 players vendors recommend Kingston (down in the list) over SanDisk. I >experimented with Samsung and SanDisk with no significant difference. Class 10 cards are rated based upon a large single file streaming, to a freshly formatted card. Optimized for video recording Class 2/4/6 cards are rated based upon multiple small files and fragmented file system. What one might get from a still image camera from which the user has erased some images and then continued shooting. I'd expect the better card brands to not have too much of a difference between high speed stream vs fragmented multi-files. Cheaper brand class 10s, OTOH, may be much slower when fragmentation sets in (internal sector sizes may be such that nearly any write operation requires buffering lots of data while the sector is erased and rewritten). -- Wulfraed Dennis Lee Bieber AF6VN wlfraed@ix.netcom.com HTTP://wlfraed.home.netcom.com/