1 2 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> 3 <html><head><title>Python: module telemetry.value.histogram_util</title> 4 <meta charset="utf-8"> 5 </head><body bgcolor="#f0f0f8"> 6 7 <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="heading"> 8 <tr bgcolor="#7799ee"> 9 <td valign=bottom> <br> 10 <font color="#ffffff" face="helvetica, arial"> <br><big><big><strong><a href="telemetry.html"><font color="#ffffff">telemetry</font></a>.<a href="telemetry.value.html"><font color="#ffffff">value</font></a>.histogram_util</strong></big></big></font></td 11 ><td align=right valign=bottom 12 ><font color="#ffffff" face="helvetica, arial"><a href=".">index</a><br><a href="../telemetry/value/histogram_util.py">telemetry/value/histogram_util.py</a></font></td></tr></table> 13 <p><tt>This is a helper module to get and manipulate histogram data.<br> 14 <br> 15 The histogram data is the same data as is visible from "chrome://histograms".<br> 16 More information can be found at: chromium/src/base/metrics/histogram.h</tt></p> 17 <p> 18 <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section"> 19 <tr bgcolor="#aa55cc"> 20 <td colspan=3 valign=bottom> <br> 21 <font color="#ffffff" face="helvetica, arial"><big><strong>Modules</strong></big></font></td></tr> 22 23 <tr><td bgcolor="#aa55cc"><tt> </tt></td><td> </td> 24 <td width="100%"><table width="100%" summary="list"><tr><td width="25%" valign=top><a href="collections.html">collections</a><br> 25 </td><td width="25%" valign=top><a href="telemetry.core.exceptions.html">telemetry.core.exceptions</a><br> 26 </td><td width="25%" valign=top><a href="json.html">json</a><br> 27 </td><td width="25%" valign=top><a href="logging.html">logging</a><br> 28 </td></tr></table></td></tr></table><p> 29 <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section"> 30 <tr bgcolor="#eeaa77"> 31 <td colspan=3 valign=bottom> <br> 32 <font color="#ffffff" face="helvetica, arial"><big><strong>Functions</strong></big></font></td></tr> 33 34 <tr><td bgcolor="#eeaa77"><tt> </tt></td><td> </td> 35 <td width="100%"><dl><dt><a name="-AddHistograms"><strong>AddHistograms</strong></a>(histogram_jsons)</dt><dd><tt>Adds histograms together. Used for aggregating data.<br> 36 <br> 37 The parameter is a list of json serializations and the returned result is a<br> 38 json serialization too.<br> 39 <br> 40 Note that the histograms to be added together are typically from different<br> 41 processes.</tt></dd></dl> 42 <dl><dt><a name="-CustomizeBrowserOptions"><strong>CustomizeBrowserOptions</strong></a>(options)</dt><dd><tt>Allows histogram collection.</tt></dd></dl> 43 <dl><dt><a name="-GetHistogram"><strong>GetHistogram</strong></a>(histogram_type, histogram_name, tab)</dt><dd><tt>Get a json serialization of a histogram.</tt></dd></dl> 44 <dl><dt><a name="-GetHistogramBucketsFromJson"><strong>GetHistogramBucketsFromJson</strong></a>(histogram_json)</dt></dl> 45 <dl><dt><a name="-GetHistogramBucketsFromRawValue"><strong>GetHistogramBucketsFromRawValue</strong></a>(raw_value)</dt></dl> 46 <dl><dt><a name="-GetHistogramCount"><strong>GetHistogramCount</strong></a>(histogram_type, histogram_name, tab)</dt><dd><tt>Get the count of events for the given histograms.</tt></dd></dl> 47 <dl><dt><a name="-GetHistogramSum"><strong>GetHistogramSum</strong></a>(histogram_type, histogram_name, tab)</dt><dd><tt>Get the sum of events for the given histograms.</tt></dd></dl> 48 <dl><dt><a name="-SubtractHistogram"><strong>SubtractHistogram</strong></a>(histogram_json, start_histogram_json)</dt><dd><tt>Subtracts a previous histogram from a histogram.<br> 49 <br> 50 Both parameters and the returned result are json serializations.</tt></dd></dl> 51 </td></tr></table><p> 52 <table width="100%" cellspacing=0 cellpadding=2 border=0 summary="section"> 53 <tr bgcolor="#55aa55"> 54 <td colspan=3 valign=bottom> <br> 55 <font color="#ffffff" face="helvetica, arial"><big><strong>Data</strong></big></font></td></tr> 56 57 <tr><td bgcolor="#55aa55"><tt> </tt></td><td> </td> 58 <td width="100%"><strong>BROWSER_HISTOGRAM</strong> = 'browser_histogram'<br> 59 <strong>RENDERER_HISTOGRAM</strong> = 'renderer_histogram'</td></tr></table> 60 </body></html>
