From patchwork Mon Mar 15 06:18:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Tzvetomir Stoyanov (VMware)" X-Patchwork-Id: 12138433 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7B11FC43381 for ; Mon, 15 Mar 2021 06:20:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6899864E64 for ; Mon, 15 Mar 2021 06:20:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229944AbhCOGTd (ORCPT ); Mon, 15 Mar 2021 02:19:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58352 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229951AbhCOGTI (ORCPT ); Mon, 15 Mar 2021 02:19:08 -0400 Received: from mail-ej1-x62c.google.com (mail-ej1-x62c.google.com [IPv6:2a00:1450:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AEC6DC061574 for ; Sun, 14 Mar 2021 23:19:07 -0700 (PDT) Received: by mail-ej1-x62c.google.com with SMTP id lr13so64242507ejb.8 for ; Sun, 14 Mar 2021 23:19:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=IenKFzFG83xtDGf9KkCaQpGW0t9/z9lSzSq7mZfH8BY=; b=SBbjZCW39pNoDUg/xaY02n8mbrt8ggszNbmZ0Fq/R469YtQGeYPVX4R3D20cGkT+5V 6ytSBP37MKD/Dp5B1jTc8D+UemSA7KDNciGuPYekW/wOXxY+AybJ+qWyJoSYlOuoTlZ0 KjQfSS6ynpuiiomPG4eJE4yLYNxGs+x8Li4NPgisTq6BGdvcUAvYHHt6Eai3EpW78+mb eBOYmi6NV21nwEdITtMLVk02aOtLrLY1tUuWLSIL615yk4XfVGNiL0QQKH0DCd/cqJ08 m3Q01adqv9H0RPi3nVCpHsZann24RLdAUYK8lqGmzzGjnjVRsirn9dAGqvSUTpMhkwa6 ah+A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=IenKFzFG83xtDGf9KkCaQpGW0t9/z9lSzSq7mZfH8BY=; b=KbSoRLhWeJ2T2i/hgidYLhxmkkGSI1PQSscErHNpImLVMuw6uSyZnKwDQDA0D916iC N/U96qcJIrx1yzh02qh0Q9bKRwMFsQpjwLLgjXhQb8M0/AOv2ew2aVVY6QxTjggfIc7F A7VW2dshKJ+2cVw+C7iDoVNvXY/LI6PsBOk/fCg8Vi1JhmZu+dXTxGZ/OloxT2ELyRDw sny0kIDCG3e6+4Cznntgo2L3rS9sh+BtR4sWw0JsnV4mqLPp93CFvuEotMp5RpU+Gbi0 m6Hw7oKlDXyrz2PPtnBPM/d6TjKkUahGS5J0epE3cHONCQfI+5svWkBwfq3HuEXtDXMf Th+g== X-Gm-Message-State: AOAM533iq5PB+mNo6LVSLmbqonE8zB8a9CvxwwO3Jb12ScqUvRHzM87W dr0gFtqkEiqnrDGCsT1syiOf5vi05i6XkQ== X-Google-Smtp-Source: ABdhPJxYU8SNiMt9hNDepcAtq9t5qvyMNFQmW4R7TO5/Vvmv7atVR4/aZQslG+uXAUbWgfVo7ljh5A== X-Received: by 2002:a17:907:7637:: with SMTP id jy23mr20983016ejc.12.1615789146457; Sun, 14 Mar 2021 23:19:06 -0700 (PDT) Received: from localhost.localdomain ([130.185.229.134]) by smtp.gmail.com with ESMTPSA id u13sm6706086ejy.31.2021.03.14.23.19.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 14 Mar 2021 23:19:06 -0700 (PDT) From: "Tzvetomir Stoyanov (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v32 4/5] trace-cmd: Debug scripts for PTP-like algorithm for host - guest timestamp synchronization Date: Mon, 15 Mar 2021 08:18:56 +0200 Message-Id: <20210315061857.168570-5-tz.stoyanov@gmail.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210315061857.168570-1-tz.stoyanov@gmail.com> References: <20210315061857.168570-1-tz.stoyanov@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org These scripts can be used to visualise debug files, written when the PTP-like algorithm is compiled with TSYNC_DEBUG defined. The files are located in the guest machine: s-cid*.txt - For each offset calculation: host and guest clocks and calculated offset. res-cid*.txt - For each tracing session: all calculated clock offsets. tsync_hist.py plots a histogram, using data from a s-cid*.txt file: "python tsync_hist.py s-cid2_1.txt" tsync_res.py plots a line, using data from res-cid*.txt file: "python tsync_res.py res-cid2.txt" Signed-off-by: Tzvetomir Stoyanov (VMware) --- scripts/debug/tsync_hist.py | 57 +++++++++++++++++++++++++++++++++++++ scripts/debug/tsync_readme | 12 ++++++++ scripts/debug/tsync_res.py | 46 ++++++++++++++++++++++++++++++ 3 files changed, 115 insertions(+) create mode 100644 scripts/debug/tsync_hist.py create mode 100644 scripts/debug/tsync_readme create mode 100644 scripts/debug/tsync_res.py diff --git a/scripts/debug/tsync_hist.py b/scripts/debug/tsync_hist.py new file mode 100644 index 00000000..819d1e8f --- /dev/null +++ b/scripts/debug/tsync_hist.py @@ -0,0 +1,57 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (C) 2019, VMware Inc, Tzvetomir Stoyanov +# Copyright (C) 2019, VMware Inc, Yordan Karadzhov + + +import matplotlib.pyplot as plt +import matplotlib.lines as mlines +import numpy as np +import sys + +def newline(p1, p2): + ax = plt.gca() + xmin, xmax = ax.get_xbound() + + if(p2[0] == p1[0]): + xmin = xmax = p1[0] + ymin, ymax = ax.get_ybound() + else: + ymax = p1[1]+(p2[1]-p1[1])/(p2[0]-p1[0])*(xmax-p1[0]) + ymin = p1[1]+(p2[1]-p1[1])/(p2[0]-p1[0])*(xmin-p1[0]) + + l = mlines.Line2D([xmin,xmax], [ymin,ymax], color='red') + ax.add_line(l) + return l + + +data = np.loadtxt(fname = sys.argv[1]) +selected_ts = data[-1, 1] +selected_ofs = data[-1, 0] +data = data[:-1,:] + +x = data[:, 1] - data[:, 0] + +mean = x.mean() +std = x.std() + +num_bins = 500 +min = x.min() #+ .4 * (x.max() - x.min()) +max = x.max() #- .4 * (x.max() - x.min()) +bins = np.linspace(min, max, num_bins, endpoint = False, dtype=int) + +fig, ax = plt.subplots() + +# the histogram of the data +n, bins, patches = ax.hist(x, bins, histtype=u'step'); + +ax.set_xlabel('clock offset [$\mu$s]') +ax.set_ylabel('entries') +ax.set_title("$\sigma$=%i" % std) + +x1, y1 = [selected_ofs, min], [selected_ofs, max] +newline(x1, y1) + +# Tweak spacing to prevent clipping of ylabel +fig.tight_layout() +plt.show() diff --git a/scripts/debug/tsync_readme b/scripts/debug/tsync_readme new file mode 100644 index 00000000..f3ebb25d --- /dev/null +++ b/scripts/debug/tsync_readme @@ -0,0 +1,12 @@ +PTP-like algorithm debug +======================== + +tsync_*.py scripts can be used to visualise debug files, written when the PTP-like algorithm +is compiled with TSYNC_DEBUG defined. The files are located in the guest machine: + s-cid*.txt - For each offset calculation: host and guest clocks and calculated offset. + res-cid*.txt - For each tracing session: all calculated clock offsets. + +tsync_hist.py plots a histogram, using data from a s-cid*.txt file: + "python tsync_hist.py s-cid2_1.txt" +tsync_res.py plots a line, using data from res-cid*.txt file: + "python tsync_res.py res-cid2.txt" diff --git a/scripts/debug/tsync_res.py b/scripts/debug/tsync_res.py new file mode 100644 index 00000000..7d109863 --- /dev/null +++ b/scripts/debug/tsync_res.py @@ -0,0 +1,46 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (C) 2019, VMware Inc, Tzvetomir Stoyanov +# Copyright (C) 2019, VMware Inc, Yordan Karadzhov + + +import matplotlib.pyplot as plt +import matplotlib.lines as mlines +import numpy as np +import sys + +def newline(p1, p2): + ax = plt.gca() + xmin, xmax = ax.get_xbound() + + if(p2[0] == p1[0]): + xmin = xmax = p1[0] + ymin, ymax = ax.get_ybound() + else: + ymax = p1[1]+(p2[1]-p1[1])/(p2[0]-p1[0])*(xmax-p1[0]) + ymin = p1[1]+(p2[1]-p1[1])/(p2[0]-p1[0])*(xmin-p1[0]) + + l = mlines.Line2D([xmin,xmax], [ymin,ymax], color='red') + ax.add_line(l) + return l + +data = np.loadtxt(fname = sys.argv[1]) +x = data[:, 0] +y = data[:, 1] + +fig, ax = plt.subplots() + +ax.set_xlabel('samples (t)') +ax.set_ylabel('clock offset') +ax.set_title("$\delta$=%i ns" % (max(y) - min(y))) + +l = mlines.Line2D(x, y) +ax.add_line(l) +ax.set_xlim(min(x), max(x)) +ax.set_ylim(min(y), max(y) ) + +print(min(y), max(y), max(y) - min(y)) + +# Tweak spacing to prevent clipping of ylabel +fig.tight_layout() +plt.show()