Understanding of BPF

When I need to capture some packets using tcpdump, I use command like:

tcpdump -i eth0 "dst host 192.168.1.0"

I always think the *dst host 192.168.1.0* part is something called BPF, Berkeley Packet Filter. To me, it's a simple language to filter network packets. But today my roommate tells me that BPF can be used to capture performance info. According to his description, it's like the tool perfmon on Windows. Is it true? Is it the same BPF as I mentioned in the beginning of the question?