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Date:      Mon, 27 Jan 2020 12:22:59 -0800
From:      Gleb Smirnoff <glebius@freebsd.org>
To:        Cy Schubert <Cy.Schubert@cschubert.com>
Cc:        Hans Petter Selasky <hps@selasky.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   Re: svn commit: r357004 - in head/sys: kern sys
Message-ID:  <20200127202259.GW1268@FreeBSD.org>
In-Reply-To: <202001242023.00OKNXlS094989@slippy.cwsent.com>
References:  <202001230124.00N1OlXi029506@repo.freebsd.org> <fb6e84b6-85a9-3252-c27a-bb9ee7ca203f@selasky.org> <23f272a4-c997-a454-19d6-10392713e71f@selasky.org> <20200124170532.GO1268@FreeBSD.org> <7d7db96d-26b1-1d2b-9f8d-a3f8fbe8c33c@selasky.org> <202001242023.00OKNXlS094989@slippy.cwsent.com>

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On Fri, Jan 24, 2020 at 12:23:33PM -0800, Cy Schubert wrote:
C> > Let not the network epoch become the new Giant of EPOCH's. There might 
C> > be realtime constraints for EPOCH's aswell.
C> 
C> I also had that concern yesterday.
C> 
C> Obtaining an EPOCH higher up the call stack or lower down depends on the 
C> workload. Are there any measurements that moving the EPOCHs higher in the 
C> call stack improves one workload (and configuration) or another? Could one 
C> type of workload or configuration benefit from this at the expense of 
C> another workload or configuration?

Can you imagine a workload where calling epoch_enter/exit more often but
for a shorter period of execution would be beneficial that calling it
once for a packet?

-- 
Gleb Smirnoff



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