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I have no idea what a level II i/o function is. The man pages don't seem
to break them down into that classification. Is this a standard usage
or are you just making crap up?
perl -e 'print "asdfsfsfdsldfjlskdfjlsjflsadjflsdfsadfsf" foreach
| truss perl -le '<STDIN>'
shows "read" system calls of size 5120 on SunOS 5.9. The same
thing but with strace rather than truss gives ones of 4096 bytes on
Linux 126.96.36.199-0.2.5-smp. An old Irix system I no longer have access
to used 10240 bytes. At least Perl for Windows uses 512 bytes, but since
it doesn't have a "strace" equivalent I don't remember how I deduced that.
Coming from you, that is rather rich.
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