From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-out-2.itc.rwth-aachen.de ([134.130.5.47]:37031 "EHLO mail-out-2.itc.rwth-aachen.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932621AbdIYHEQ (ORCPT ); Mon, 25 Sep 2017 03:04:16 -0400 From: "Fuhrmann, Carsten" To: Andrei Borzenkov , Qu Wenruo , "linux-btrfs@vger.kernel.org" Subject: AW: AW: Btrfs performance with small blocksize on SSD Date: Mon, 25 Sep 2017 07:04:14 +0000 Message-ID: References: <3321b3c199da4d378bbfa3dbac3c4059@rwth-aachen.de> In-Reply-To: Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Sender: linux-btrfs-owner@vger.kernel.org List-ID: Well the correct translation for "Laufzeit" is runtime and not latency. But thank you for that hint, I'll change it to "gesamt Laufzeit" to make it more clear. Best regards Carsten -----Ursprüngliche Nachricht----- Von: Andrei Borzenkov [mailto:arvidjaar@gmail.com] Gesendet: Sonntag, 24. September 2017 18:43 An: Fuhrmann, Carsten ; Qu Wenruo ; linux-btrfs@vger.kernel.org Betreff: Re: AW: Btrfs performance with small blocksize on SSD 24.09.2017 16:53, Fuhrmann, Carsten пишет: > Hello, > > 1) > I used direct write (no page cache) but I didn't disable the Disk cache of the HDD/SSD itself. In all tests I wrote 1GB and looked for the runtime of that write process. So "latency" on your diagram means total time to write 1GiB file? That is highly unusual meaning for "latency" which normally means time to perform single IO. If so, you should better rename Y-axis to something like "total run time". {.n++%ݶw{.n+{k~^nrzh&zzޗ++zfh~iz_j:+v)ߣm