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POcopying large files in c/c++ under FreeBSD freezes system
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  1. POcopying large files in c/c++ under FreeBSD freezes system
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    copied!<p>this code seems to work under Windows (with unexpected results) and Ubuntu. But when I run it under FreeBSD 9.0 AMD 64 it causes the system to freeze. I get error messages like this:<br> ahcich0: Timeout on slot 28 port 0<br> Does anybody know what the problem could be?<br> Thanks.</p> <pre><code>#include &lt;cmath&gt; #include &lt;cstdlib&gt; #include &lt;sys/time.h&gt; #include &lt;iostream&gt; #include &lt;fstream&gt; #include &lt;string&gt; using namespace std; int main(int argc, char *argv[]) { const string FILENAME = "testfile"; const string COPYNAME = "copy"; const int FILES = 5; const int SIZE_MULTIPLIER = 6; const int BUFFER_SIZE = pow(2.0, 16); time_t times[2][FILES]; srand (time(NULL)); // create test files for (int i = 1; i &lt; FILES + 1; i++){ ofstream os; string filename(FILENAME); filename += (char)i + 48; os.open(filename.c_str(), ios::binary); if (os.is_open()){ cout &lt;&lt; "Writing file " &lt;&lt; i &lt;&lt; " of " &lt;&lt; FILES; long filesize =pow(2.0, i * SIZE_MULTIPLIER); cout &lt;&lt; " (" &lt;&lt; filesize &lt;&lt; " bytes)" &lt;&lt; endl; while(filesize--){ os &lt;&lt; (char)(rand() % 256); } cout &lt;&lt; os.tellp() &lt;&lt; " bytes written.\n"; os.close(); }else{ cerr &lt;&lt; "Could not create file " &lt;&lt; filename; cerr &lt;&lt; endl; } } // copy the files timeval tv; time_t start; char buffer[BUFFER_SIZE]; char ci; for (int i = 0; i &lt; FILES; i++){ ci = (char)i + 49; string filename(FILENAME); filename += ci; string copyname("c"); copyname += COPYNAME; copyname += ci; cout &lt;&lt; "Copying file " &lt;&lt; filename.c_str() &lt;&lt; endl; cout &lt;&lt; "the c way: "; cout.flush(); start = time(NULL); FILE *pFile = fopen(filename.c_str(), "rb"); FILE *pCopy = fopen(copyname.c_str(), "wb"); if (!(pFile == NULL || pCopy == NULL)){ do{ int bytesRead = fread( buffer, 1, BUFFER_SIZE, pFile); fwrite(buffer, 1, bytesRead, pCopy); }while(!feof(pFile)); fclose(pFile); fclose(pCopy); cout &lt;&lt; " Done.\n"; }else{ cerr &lt;&lt; "Could not open either " &lt;&lt; filename; cerr &lt;&lt; " or " &lt;&lt; copyname &lt;&lt; endl; } times[0][i] = time(NULL) - start; remove(copyname.c_str()); copyname = "cpp"; copyname += COPYNAME; copyname += ci; cout &lt;&lt; "the c++ way: "; cout.flush(); start = time(NULL); ifstream in; in.open(filename.c_str(), ios::binary); in.rdbuf()-&gt;pubsetbuf(buffer, BUFFER_SIZE); ofstream out; out.open(copyname.c_str(), ios::binary); char copyBuffer[BUFFER_SIZE]; out.rdbuf()-&gt;pubsetbuf(copyBuffer, BUFFER_SIZE); if (in.is_open() &amp;&amp; out.is_open()){ out &lt;&lt; in.rdbuf(); in.close(); out.close(); cout &lt;&lt; " Done.\n"; }else{ cerr &lt;&lt; "Could not open either " &lt;&lt; filename; cerr &lt;&lt; " or " &lt;&lt; copyname &lt;&lt; endl; } times[1][i] = time(NULL) - start ; remove(copyname.c_str()); } cout &lt;&lt; "Summary:\n"; cout &lt;&lt; "\tc\tc++\n"; for (int i = 0; i &lt; FILES; i++){ ci = (char)i + 49; cout &lt;&lt; "copy" &lt;&lt; ci &lt;&lt; "\t" &lt;&lt; times[0][i]; cout &lt;&lt; "\t" &lt;&lt; times[1][i] &lt;&lt; endl; } return 0; } </code></pre>
 

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