Date: Sat, 2 Mar 2019 19:12:17 +0200 From: Konstantin Belousov <kostikbel@gmail.com> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: Ian Lepore <ian@freebsd.org>, Mark Millard <marklmi@yahoo.com>, Mark Millard via freebsd-hackers <freebsd-hackers@freebsd.org>, bde@freebsd.org, FreeBSD PowerPC ML <freebsd-ppc@freebsd.org> Subject: Re: powerpc64 head -r344018 stuck sleeping problems: th->th_scale * tc_delta(th) overflows unsigned 64 bits sometimes [patched failed] Message-ID: <20190302171217.GG68879@kib.kiev.ua> In-Reply-To: <10227.1551538199@critter.freebsd.dk> References: <962D78C3-65BE-40C1-BB50-A0088223C17B@yahoo.com> <28C2BB0A-3DAA-4D18-A317-49A8DD52778F@yahoo.com> <20190301112717.GW2420@kib.kiev.ua> <679402FF-907C-43AF-B18C-8C9CC857D7A6@yahoo.com> <6669.1551473821@critter.freebsd.dk> <210dfd0f50ee6b1149c914ee503502654eb5f328.camel@freebsd.org> <20190302105652.GD68879@kib.kiev.ua> <9993.1551536230@critter.freebsd.dk> <20190302142814.GF68879@kib.kiev.ua> <10227.1551538199@critter.freebsd.dk>
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On Sat, Mar 02, 2019 at 02:49:59PM +0000, Poul-Henning Kamp wrote: > -------- > In message <20190302142814.GF68879@kib.kiev.ua>, Konstantin Belousov writes: > >On Sat, Mar 02, 2019 at 02:17:10PM +0000, Poul-Henning Kamp wrote: > > >More the timehands, more the propagation can be delayed by the hardware. > > One of the two of us don't understand how timecounters work. Perhaps look at the code ? Pre-2015 (or so) timecounters did not worked on non-TSO machines.
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