In a context where exceptions are caught, I ran the fragment:
cerr << "allocating" << endl; char* arr[100]; for (int jj = 0; jj < 10; ++jj) { cerr << "jj = " << jj << endl; arr[jj] = new char[2000000000]; sleep (30); } sleep (10); for (int jj = 0; jj < 10; ++jj) delete[] arr[jj]; cerr << "deleted" << endl;
The exception was caught with jj = 1, i.e., on the second allocation.
But on top, I see:
top - 14:08:46 up 5:21, 10 users, load average: 0.04, 0.06, 0.08 Tasks: 158 total, 1 running, 157 sleeping, 0 stopped, 0 zombie Cpu(s): 2.7%us, 2.0%sy, 0.0%ni, 94.5%id, 0.6%wa, 0.1%hi, 0.1%si, 0.0%st Mem: 1941908k total, 1231804k used, 710104k free, 138372k buffers Swap: 3899384k total, 0k used, 3899384k free, 876020k cached
and the "710104k free" suggests that I should have failed on the first allocation. Furthermore, the allocation did not alter the values in top (except for a little jitter).
Wherein do I err?
[~]$ uname -a Linux xxxxx 2.6.18-194.32.1.el5 #1 SMP Wed Jan 5 17:53:09 EST 2011 i686 i686 i386 GNU/Linux
Thanks, Mike.