Date: Sun, 24 Jun 2001 12:40:42 -0700 (PDT) From: Matt Dillon <dillon@earth.backplane.com> To: "Alfred Perlstein" <bright@sneakerz.org> Cc: Mike Silbersack <silby@silby.com>, Mike Silbersack <silby@FreeBSD.ORG>, cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, jlemon@FreeBSD.ORG, bmilekic@FreeBSD.ORG Subject: Re: cvs commit: src/sys/netinet tcp_input.c tcp_output.c tcp_subr.c tcp_timer.c tcp_usrreq.c tcp_var.h Message-ID: <200106241940.f5OJegE79441@earth.backplane.com> References: <200106231730.f5NHUNd73058@earth.backplane.com> <20010623131152.I23528-100000@achilles.silby.com> <20010624135828.A64836@sneakerz.org>
next in thread | previous in thread | raw e-mail | index | archive | help
:bzero seems to be optimized for large areas, perhaps it would help
:malloc some if we used some alternative zero'ing function for small
:allocations with M_ZERO set?
:
:-Alfred
It would be kinda messy, because 'size' is not a constant inside
malloc() so there is no easy way to optimize out the overhead of
the bzero() call or the conditionals within it. On the flip side,
at least with the kernel malloc you *know* things are aligned and
we know things are in chunks of at least sizeof(int), which means
we could implement a (non-inline) bzerol() call which does away
with a lot of the garbage sitting in i586_bzero(), cutting the
overhead for zeroing small allocations in half.
-Matt
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe cvs-all" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200106241940.f5OJegE79441>