Dtrace basics

# New processes with arguments
dtrace -n 'proc:::exec-success { trace(curpsinfo->pr_psargs);  }'
 
# Files opened by process
dtrace -n 'syscall::open*:entry { printf("%s %s",execname,copyinstr(arg0));  }'
 
# Syscall count by program
dtrace -n 'syscall:::entry { @num[execname] = count();  }'
 
# Syscall count by syscall
dtrace -n 'syscall:::entry { @num[probefunc] = count();  }'
 
# Syscall count by process
dtrace -n 'syscall:::entry { @num[pid,execname] = count();  }'
 
# Disk size by process
dtrace -n 'io:::start { printf("%d %s %d",pid,execname,args[0]->b_bcount);  }'
 
# Pages paged in by process
dtrace -n 'vminfo:::pgpgin { @pg[execname] = sum(arg0);  }'