From: Dave Taht <dave.taht@gmail.com>
To: Herbert Wolverson <herberticus@gmail.com>
Cc: libreqos <libreqos@lists.bufferbloat.net>
Subject: Re: [LibreQoS] Integration system, aka fun with graph theory
Date: Mon, 31 Oct 2022 14:54:19 -0700 [thread overview]
Message-ID: <CAA93jw4EbnhFDhF3uWGPAQ+m6Fs8cd44fscnQq8XPfDTUxZdLA@mail.gmail.com> (raw)
In-Reply-To: <CA+erpM6Q-gxMgMwPmqVEuU_+zPmViY-0irYzuzu18Gtg7RR5zw@mail.gmail.com>
glibc added a vdo mapping directly to the kernel time page, so
gettimeofday is not a syscall, and the results in the linux 4.0-4.2
era were in the 40ns range.
Last I looked, musl used the syscall, which was much, much worse.
next prev parent reply other threads:[~2022-10-31 21:54 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-27 21:33 Herbert Wolverson
2022-10-27 21:41 ` Dave Taht
2022-10-27 21:44 ` Dave Taht
2022-10-27 21:48 ` Robert Chacón
2022-10-28 0:27 ` dan
2022-10-28 12:40 ` Herbert Wolverson
2022-10-28 17:43 ` Herbert Wolverson
2022-10-28 19:05 ` Robert Chacón
2022-10-28 19:54 ` Herbert Wolverson
2022-10-28 21:15 ` Robert Chacón
2022-10-29 15:57 ` Herbert Wolverson
2022-10-29 19:05 ` Robert Chacón
2022-10-29 19:43 ` Dave Taht
2022-10-30 1:45 ` Herbert Wolverson
2022-10-31 0:15 ` Dave Taht
2022-10-31 1:15 ` Robert Chacón
2022-10-31 1:26 ` Herbert Wolverson
2022-10-31 1:36 ` Herbert Wolverson
2022-10-31 1:46 ` Herbert Wolverson
2022-10-31 2:21 ` Dave Taht
2022-10-31 3:26 ` Robert Chacón
2022-10-31 14:47 ` [LibreQoS] metaverse-ready metrics Dave Taht
2022-10-31 14:50 ` Dave Taht
2022-10-31 15:56 ` [LibreQoS] Integration system, aka fun with graph theory dan
2022-10-31 21:19 ` Herbert Wolverson
2022-10-31 21:54 ` Dave Taht [this message]
2022-10-31 21:57 ` Robert Chacón
2022-10-31 23:31 ` dan
2022-10-31 23:45 ` Dave Taht
2022-11-01 3:31 ` Dave Taht
2022-11-01 13:38 ` Herbert Wolverson
2022-10-29 19:18 ` Dave Taht
2022-10-30 1:10 ` Herbert Wolverson
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