From patchwork Fri Oct 12 16:13:12 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yordan Karadzhov X-Patchwork-Id: 10759547 Return-Path: Received: from mail-eopbgr680056.outbound.protection.outlook.com ([40.107.68.56]:3297 "EHLO NAM04-BN3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728800AbeJLXrX (ORCPT ); Fri, 12 Oct 2018 19:47:23 -0400 From: Yordan Karadzhov To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org, Yordan Karadzhov Subject: [PATCH 04/10] kernel-shark-qt: Add visualization (graph) model Date: Fri, 12 Oct 2018 19:13:12 +0300 Message-Id: <20181012161318.5302-5-ykaradzhov@vmware.com> In-Reply-To: <20181012161318.5302-1-ykaradzhov@vmware.com> References: <20181012161318.5302-1-ykaradzhov@vmware.com> MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org List-ID: Content-Length: 6194 From: Yordan Karadzhov (VMware) This patch defines the class KsGraphModel which provides a model for visualization of trace data. This class is a wrapper of kshark_trace_histo and is needed only because we want to use the signals defined in QAbstractTableModel (a class inherited by KsGraphModel). Signed-off-by: Yordan Karadzhov (VMware) --- kernel-shark-qt/src/KsModels.cpp | 153 +++++++++++++++++++++++++++++++ kernel-shark-qt/src/KsModels.hpp | 66 +++++++++++++ 2 files changed, 219 insertions(+) diff --git a/kernel-shark-qt/src/KsModels.cpp b/kernel-shark-qt/src/KsModels.cpp index 095e26b..5eb1646 100644 --- a/kernel-shark-qt/src/KsModels.cpp +++ b/kernel-shark-qt/src/KsModels.cpp @@ -330,3 +330,156 @@ size_t KsViewModel::search(int column, return matchList->count(); } + +/** Create a default (empty) KsFilterProxyModel object. */ +KsGraphModel::KsGraphModel(QObject *parent) +: QAbstractTableModel(parent) +{ + ksmodel_init(&_histo); +} + +/** Destroy KsFilterProxyModel object. */ +KsGraphModel::~KsGraphModel() +{ + ksmodel_clear(&_histo); +} + +/** + * @brief Provide the Visualization model with data. Calculate the current + * state of the model. + * + * @param entries: Input location for the trace data. + * @param n: Number of bins. + */ +void KsGraphModel::fill(kshark_entry **entries, size_t n) +{ + if (n == 0) + return; + + beginResetModel(); + + if (_histo.n_bins == 0) + ksmodel_set_bining(&_histo, + KS_DEFAULT_NBUNS, + entries[0]->ts, + entries[n-1]->ts); + + ksmodel_fill(&_histo, entries, n); + + endResetModel(); +} + +/** + * @brief Shift the time-window of the model forward. Recalculate the current + * state of the model. + * + * @param n: Number of bins to shift. + */ +void KsGraphModel::shiftForward(size_t n) +{ + beginResetModel(); + ksmodel_shift_forward(&_histo, n); + endResetModel(); +} + +/** + * @brief Shift the time-window of the model backward. Recalculate the current + * state of the model. + * + * @param n: Number of bins to shift. + */ +void KsGraphModel::shiftBackward(size_t n) +{ + beginResetModel(); + ksmodel_shift_backward(&_histo, n); + endResetModel(); +} + +/** + * @brief Move the time-window of the model to a given location. Recalculate + * the current state of the model. + * + * @param ts: position in time to be visualized. + */ +void KsGraphModel::jumpTo(size_t ts) +{ + beginResetModel(); + ksmodel_jump_to(&_histo, ts); + endResetModel(); +} + +/** + * @brief Extend the time-window of the model. Recalculate the current state + * of the model. + * + * @param r: Scale factor of the zoom-out. + * @param mark: Focus point of the zoom-out. + */ +void KsGraphModel::zoomOut(double r, int mark) +{ + beginResetModel(); + ksmodel_zoom_out(&_histo, r, mark); + endResetModel(); +} + +/** + * @brief Shrink the time-window of the model. Recalculate the current state + * of the model. + * + * @param r: Scale factor of the zoom-in. + * @param mark: Focus point of the zoom-in. + */ +void KsGraphModel::zoomIn(double r, int mark) +{ + beginResetModel(); + ksmodel_zoom_in(&_histo, r, mark); + endResetModel(); +} + +/** Quick zoom out. The entire data-set will be visualized. */ +void KsGraphModel::quickZoomOut() +{ + beginResetModel(); + + ksmodel_set_bining(&_histo, + _histo.n_bins, + _histo.data[0]->ts, + _histo.data[_histo.data_size - 1]->ts); + + ksmodel_fill(&_histo, _histo.data, _histo.data_size); + + endResetModel(); +} + +/** + * @brief Quick zoom in to a state of the Visualization model which has the + * given bin size. The actual value of the bin size may en up being slightly + * different because of the fine tuning performed by the model. + * + * @param binSize: an approximate value for the new size of the bins. + */ +void KsGraphModel::quickZoomIn(uint64_t binSize) +{ + double range, r; + + range = _histo.max - _histo.min; + r = 1 - (binSize * _histo.n_bins) / range; + zoomIn(r); +} + +/** Reset the model. */ +void KsGraphModel::reset() +{ + beginResetModel(); + ksmodel_clear(&_histo); + endResetModel(); +} + +/** Update the model. Use this function if the data has changed. */ +void KsGraphModel::update(KsDataStore *data) +{ + beginResetModel(); + if (data) + ksmodel_fill(&_histo, data->rows(), data->size()); + endResetModel(); +} diff --git a/kernel-shark-qt/src/KsModels.hpp b/kernel-shark-qt/src/KsModels.hpp index 8935fd4..00b20b2 100644 --- a/kernel-shark-qt/src/KsModels.hpp +++ b/kernel-shark-qt/src/KsModels.hpp @@ -220,4 +220,70 @@ private: bool notify); }; +/** + * Class KsGraphModel provides a model for visualization of trace data. This + * class is a wrapper of kshark_trace_histo and is needed only because we want + * to use the signals defined in QAbstractTableModel. + */ +class KsGraphModel : public QAbstractTableModel +{ +public: + explicit KsGraphModel(QObject *parent = nullptr); + + virtual ~KsGraphModel(); + + /** + * This dummy function is an implementation of the pure + * virtual method of the abstract model class. + */ + int rowCount(const QModelIndex &) const override + { + return _histo.n_bins; + } + + /** + * This dummy function is an implementation of the pure + * virtual method of the abstract model class. + */ + int columnCount(const QModelIndex &) const override {return 0;} + + /** + * This dummy function is an implementation of the pure + * virtual method of the abstract model class. + */ + QVariant data(const QModelIndex &index, int role) const override + { + return {}; + } + + /** Get the kshark_trace_histo object. */ + kshark_trace_histo *histo() {return &_histo;} + + void fill(kshark_entry **entries, size_t n); + + void shiftForward(size_t n); + + void shiftBackward(size_t n); + + void jumpTo(size_t ts); + + void zoomOut(double r, int mark = -1); + + void zoomIn(double r, int mark = -1); + + void quickZoomOut(); + + void quickZoomIn(uint64_t binSize); + + void reset(); + + void update(KsDataStore *data = nullptr); + +private: + kshark_trace_histo _histo; +}; + +/** Defines a default number of bins to be used by the visualization model. */ +#define KS_DEFAULT_NBUNS 1024 + #endif // _KS_MODELS_H