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From: cinap_lenrek@felloff.net
To: 9front@9front.org
Subject: Re: [9front] [PATCH] kernel: make conf.nproc configurable. all kernels now default to 100 + ((conf.npage*BY2PG)/MB)*5
Date: Mon, 14 Jun 2021 19:18:16 +0200
Message-ID: <7113E70C01D7084972602F13901ED0EF@felloff.net> (raw)
In-Reply-To: <3B7CD4D57FAF1705F3A5E6363CAADE67@eigenstate.org>

also just increasing nproc will have performance degradation in
some places. the kernel in some places will just iterate over
all process slots for some queries, like sending to a note
group or finding the processes that use a segment.

if that stucrure could be more dynamic we might not even need
to have such low nproc defaults. but it is here because keeping
it small keeps these operations fast.

there are also limiting factors like that we need to allocate
KSTACK bytes of memory for each process. and buffers when they
do i/o... which might be more limited by kernel KZERO address
window.



--
cinap

      reply	other threads:[~2021-06-14 17:24 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-07  9:01 james palmer
2021-06-14  1:55 ` ori
2021-06-14 17:18   ` cinap_lenrek [this message]

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