From 5d342a758c6095b4d30aba0750b54f13b8916f51 Mon Sep 17 00:00:00 2001
From: Antonin Kral <a.kral@bobek.cz>
Date: Wed, 14 Sep 2011 17:08:06 +0200
Subject: Imported Upstream version 2.0.0

---
 tools/top.cpp | 196 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 196 insertions(+)
 create mode 100644 tools/top.cpp

(limited to 'tools/top.cpp')

diff --git a/tools/top.cpp b/tools/top.cpp
new file mode 100644
index 0000000..42e4568
--- /dev/null
+++ b/tools/top.cpp
@@ -0,0 +1,196 @@
+// stat.cpp
+
+/**
+*    Copyright (C) 2008 10gen Inc.
+*
+*    This program is free software: you can redistribute it and/or  modify
+*    it under the terms of the GNU Affero General Public License, version 3,
+*    as published by the Free Software Foundation.
+*
+*    This program is distributed in the hope that it will be useful,
+*    but WITHOUT ANY WARRANTY; without even the implied warranty of
+*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*    GNU Affero General Public License for more details.
+*
+*    You should have received a copy of the GNU Affero General Public License
+*    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "pch.h"
+#include "client/dbclient.h"
+#include "db/json.h"
+#include "../util/text.h"
+#include "tool.h"
+#include <fstream>
+#include <iostream>
+#include <boost/program_options.hpp>
+
+namespace po = boost::program_options;
+
+namespace mongo {
+
+    class TopTool : public Tool {
+    public:
+
+        TopTool() : Tool( "top" , REMOTE_SERVER , "admin" ) {
+            _sleep = 1;
+
+            add_hidden_options()
+            ( "sleep" , po::value<int>() , "time to sleep between calls" )
+            ;
+            addPositionArg( "sleep" , 1 );
+
+            _autoreconnect = true;
+        }
+        
+        BSONObj getData() {
+            BSONObj out;
+            if ( ! conn().simpleCommand( _db , &out , "top" ) ) {
+                cout << "error: " << out << endl;
+                return BSONObj();
+            }
+            return out.getOwned();
+        }
+        
+        void printDiff( BSONObj prev , BSONObj now ) { 
+            if ( ! prev["totals"].isABSONObj() ||
+                 ! now["totals"].isABSONObj() ) {
+                cout << "." << endl;
+                return;
+            }
+
+            prev = prev["totals"].Obj();
+            now = now["totals"].Obj();
+            
+            vector<NSInfo> data;
+            
+            unsigned longest = 30;
+
+            BSONObjIterator i( now );
+            while ( i.more() ) {
+                BSONElement e = i.next();
+                
+                // invalid, data fixed in 1.8.0
+                if ( e.fieldName()[0] == '?' )
+                    continue;
+                
+                if ( ! str::contains( e.fieldName() , '.' ) )
+                    continue;
+                
+                BSONElement old = prev[e.fieldName()];
+                if ( old.eoo() ) 
+                    continue;
+                
+                if ( strlen( e.fieldName() ) > longest )
+                    longest = strlen(e.fieldName());
+
+                data.push_back( NSInfo( e.fieldName() , old.Obj() , e.Obj() ) );
+            }
+            
+            std::sort( data.begin() , data.end() );
+
+            cout << "\n"
+                 << setw(longest) << "ns" 
+                 << "\ttotal   "  
+                 << "\tread    "    
+                 << "\twrite   "  
+                 << "\t\t" << terseCurrentTime()
+                 << endl;
+            for ( int i=data.size()-1; i>=0 && data.size() - i < 10 ; i-- ) {
+                cout << setw(longest) << data[i].ns 
+                     << "\t" << setprecision(3) << data[i].diffTimeMS( "total" ) << "ms" 
+                     << "\t" << setprecision(3) << data[i].diffTimeMS( "readLock" ) << "ms" 
+                     << "\t" << setprecision(3) << data[i].diffTimeMS( "writeLock" ) << "ms" 
+                     << endl;
+            }
+        }
+
+        int run() {
+            _sleep = getParam( "sleep" , _sleep );
+            
+            BSONObj prev = getData();
+
+            while ( true ) {
+                sleepsecs( _sleep );
+                
+                BSONObj now;
+                try {
+                    now = getData();
+                }
+                catch ( std::exception& e ) {
+                    cout << "can't get data: " << e.what() << endl;
+                    continue;
+                }
+
+                if ( now.isEmpty() )
+                    return -2;
+                
+                try {
+                    printDiff( prev , now );
+                }
+                catch ( AssertionException& e ) {
+                    cout << "\nerror: " << e.what() << "\n"
+                         << now
+                         << endl;
+                }
+
+
+                prev = now;
+            }
+
+            return 0;
+        }
+
+        struct NSInfo {
+            NSInfo( string thens , BSONObj a , BSONObj b ) {
+                ns = thens;
+                prev = a;
+                cur = b;
+                
+                timeDiff = diffTime( "total" );
+            }
+            
+            
+            int diffTimeMS( const char * field  ) const {
+                return (int)(diffTime( field ) / 1000);
+            }
+
+            double diffTime( const char * field ) const {
+                return diff( field , "time" );
+            }
+            
+            double diffCount( const char * field ) const {
+                return diff( field , "count" );
+            }
+
+            /**
+             * @param field total,readLock, etc...
+             * @param type time or count
+             */
+            double diff( const char * field , const char * type ) const {
+                return cur[field].Obj()[type].number() - prev[field].Obj()[type].number();
+            }
+
+            bool operator<(const NSInfo& r) const {
+                return timeDiff < r.timeDiff;
+            }
+            
+            string ns;
+            
+            BSONObj prev;
+            BSONObj cur;
+
+            double timeDiff; // time diff between prev and cur
+        };
+
+    private:
+        int _sleep;
+    };
+
+}
+
+int main( int argc , char ** argv ) {
+    mongo::TopTool top;
+    return top.main( argc , argv );
+}
+
-- 
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