Date: Thu, 5 Dec 2019 11:24:58 -0800 (PST) From: "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net> To: Wojciech Puchar <wojtek@puchar.net> Cc: Darius Mihai <dariusmihaim@gmail.com>, "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net>, freebsd-hackers@freebsd.org Subject: Re: bhyve+windows 7 multicore performance Message-ID: <201912051924.xB5JOw7V045421@gndrsh.dnsmgr.net> In-Reply-To: <alpine.BSF.2.20.1912051043510.83609@puchar.net>
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> > On Wed, 4 Dec 2019, Darius Mihai wrote: > > > > > > > On Wed, Dec 4, 2019, 18:22 Wojciech Puchar <wojtek@puchar.net> wrote: > > >>> > > >>> Try 4 cores, and drop the priority boost, you may be causeing > > >> > > >> Well i need more cores than 4 for that VM. > > >> I will try even number (10) and no nice. > > > > > > If 4 cores performs better than 10 cores why would you want > > > > performs better per thread. Not as total. > > > > > > removing -P option improved performance a bit. Well - a large bit. > > > > > > If I remember correctly, windows runs PAUSE very often when idling, > > so having many cores that stay idle may slow down the system > > since -P forces context switches when that instruction is > > executed.? > > > > Darius > Possibly. But for sure - this made things faster a lot. Actually close to > bare metal performance. Does this close the issue of performance for you and I can remove this thread from my list of active investigation? THanks, -- Rod Grimes rgrimes@freebsd.org
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