Date: Wed, 07 Apr 2021 05:25:09 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> Cc: current@freebsd.org Subject: Re: console getty uses 1.5% of CPU Message-ID: <69146.1617773109@critter.freebsd.dk> In-Reply-To: <69119.1617772960@critter.freebsd.dk> References: <69119.1617772960@critter.freebsd.dk>
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-------- Poul-Henning Kamp writes: > I have two 12.2-R systems where the serial console is attached to a term= inal server. > > When there are no TCP connections to the terminal server, getty soaks up= 1.5% of the > CPU in the kernel (sleeping in "ttyin"), ktrace shows no system calls. > > When a TCP connection is made to the terminal server, which raises the m= odem-handshake > on the DE-9 connector, the CPU usage stops. > > Anybody else seeing something like this ? Just checked, also happens on a similar box running 13.0-ALPHA3 -- = Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe = Never attribute to malice what can adequately be explained by incompetence= .
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