Date: Fri, 25 Mar 2005 22:30:53 +0200 From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: Jonathan Stewart <jonstew1983@yahoo.com> Cc: freebsd-questions@freebsd.org Subject: Re: Discrepancy between ps -i -o inblk and figuring numbers by hand Message-ID: <20050325203052.GA1680@gothmog.gr> In-Reply-To: <20050325180841.63828.qmail@web50903.mail.yahoo.com> References: <20050325180841.63828.qmail@web50903.mail.yahoo.com>
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On 2005-03-25 10:08, Jonathan Stewart <jonstew1983@yahoo.com> wrote: > --- Giorgos Keramidas keramida at ceid dot upatras dot gr wrote: > > So, what you are looking for is a single byte count that increases > > sequentially for all read() and write() system calls? > > Pretty much, yes. To be specific all read() and write() calls for a > given process. Even something that counted in 512 byte or UFUFSlocks > would be useful. To what end, may I ask? Per process statistics may include byte counts from a few thousand threads that read and/or write from a few hundred descriptors. Even per file descriptor statistics quickly get useless when one considers that a single byte read may cause the read-ahead of a few thousand bytes or that a single write may reach the corresponding device several seconds later.
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