From patchwork Wed Mar 31 07:29:00 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: 12174531 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 80530C433E3 for ; Wed, 31 Mar 2021 07:30:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 55526619D9 for ; Wed, 31 Mar 2021 07:30:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233850AbhCaH3j (ORCPT ); Wed, 31 Mar 2021 03:29:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39240 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233881AbhCaH3K (ORCPT ); Wed, 31 Mar 2021 03:29:10 -0400 Received: from mail-ed1-x52d.google.com (mail-ed1-x52d.google.com [IPv6:2a00:1450:4864:20::52d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D9816C061574 for ; Wed, 31 Mar 2021 00:29:09 -0700 (PDT) Received: by mail-ed1-x52d.google.com with SMTP id j3so21037930edp.11 for ; Wed, 31 Mar 2021 00:29:09 -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=s/wYTd27b2A1EJhLKQ1KtM3Ao7q7OdGdfUq/Zly0vtY=; b=MkVeGKfwROfdacIBLD2x/1Jb9FUfPoun4b79mC/23Ccc6VDAsMM0KQCJ0ThALfZIID CM3HF1EuxsmdPrzNzRngYUXADZqprRmmJCd5eK2r0sayfXfvxL+wkiN91P9ui10vN+u6 nmvgIRwl5wad9gJv55gJizxeCKVrfNQPjWo+ry4rUrBSAonMWgNNMUmc176e6s6maiRV iTf0EBPVQ+fThMRJAb//M1ejsTbaPZi6TNeRP5ozY+vy2g0kFQBgwg0tZZ+WPEpqIC7p +sMtFL3foLo6ZvmRHObiS2Z3byzdIIYFDnVcfT/d2vEGNyWwUHnHZjpu+ZLC2AGB9lsF s4Vg== 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=s/wYTd27b2A1EJhLKQ1KtM3Ao7q7OdGdfUq/Zly0vtY=; b=lDx0wcytKCl6EAIqHGTYP6iEoaDI1ZDLqrpB4tkscvxFlmDUBu8FEkoJzKa5v4ozXp QHOqqlPu2s5a9LjpLlJGZ5hlm5thBqIm2RLZZ1oXEv6f10ssmE9ClRnfAMywytFw/GY6 tPSiwfoqkLAHi4/2JJ+7UwemIP/dskEiOw0JK3N9tHkqQJWGgvoVcyIz1WUkCIU3r8qB 8FVYSB9gX927tgZUd2ljQNj2lr1dQnXThTKI7mPcpgeSb8fr66P46SKAFJe9byhSYJ1s gXu5d0fa3AenkXikP+Fjtr6ffyVMpzquMqOa+2F9tfhgwMJ07aiF+67w8OOXE8Hv2r4S Hflg== X-Gm-Message-State: AOAM531x0W995QksQ4NaB24PmwZcUvCZQ5t8fJM8363WtKFT9jSS0VFm 8JodzUucpTduPTA1RvSpOi+pivLzLq4v8Q== X-Google-Smtp-Source: ABdhPJxstzCxPByIL6y/vqtMTJK2vQhYaseAQcALjo2JDqIzndfdRIA6G2ZczcnvQTwIlpQmpZZerg== X-Received: by 2002:a05:6402:1393:: with SMTP id b19mr1960428edv.333.1617175748635; Wed, 31 Mar 2021 00:29:08 -0700 (PDT) Received: from oberon.vmware.com ([83.222.187.186]) by smtp.gmail.com with ESMTPSA id ho11sm587469ejc.112.2021.03.31.00.29.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 31 Mar 2021 00:29:07 -0700 (PDT) From: "Tzvetomir Stoyanov (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v34 4/5] trace-cmd: Debug scripts for PTP-like algorithm for host - guest timestamp synchronization Date: Wed, 31 Mar 2021 10:29:00 +0300 Message-Id: <20210331072901.152880-5-tz.stoyanov@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210331072901.152880-1-tz.stoyanov@gmail.com> References: <20210331072901.152880-1-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()