* idle process in x86 linux
@ 2012-10-26 14:28 Xin Tong
2012-10-26 15:51 ` David Given
0 siblings, 1 reply; 4+ messages in thread
From: Xin Tong @ 2012-10-26 14:28 UTC (permalink / raw)
To: linux-8086
I am wondering why idle process is implemented as infinite loop with
HLT instruction. how does it compare to MWAIT and MONITOR instruction
sequence ?
Xin
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: idle process in x86 linux
2012-10-26 14:28 idle process in x86 linux Xin Tong
@ 2012-10-26 15:51 ` David Given
2012-10-27 3:03 ` Xin Tong
0 siblings, 1 reply; 4+ messages in thread
From: David Given @ 2012-10-26 15:51 UTC (permalink / raw)
To: linux-8086
Xin Tong wrote:
> I am wondering why idle process is implemented as infinite loop with
> HLT instruction. how does it compare to MWAIT and MONITOR instruction
> sequence ?
They're only available in very modern processors --- ELKS targets the
8086, so they're not available. HLT is the only game in town.
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: idle process in x86 linux
2012-10-26 15:51 ` David Given
@ 2012-10-27 3:03 ` Xin Tong
2012-10-29 8:13 ` Angel M Alganza
0 siblings, 1 reply; 4+ messages in thread
From: Xin Tong @ 2012-10-27 3:03 UTC (permalink / raw)
To: David Given; +Cc: linux-8086
ok i see. btw ELKS stands for E Linux Kernel S ?
Xin
On Fri, Oct 26, 2012 at 11:51 AM, David Given <dg@cowlark.com> wrote:
> Xin Tong wrote:
>> I am wondering why idle process is implemented as infinite loop with
>> HLT instruction. how does it compare to MWAIT and MONITOR instruction
>> sequence ?
>
> They're only available in very modern processors --- ELKS targets the
> 8086, so they're not available. HLT is the only game in town.
>
> --
> ┌─── ｄｇ＠ｃｏｗｌａｒｋ．ｃｏｍ ───── http://www.cowlark.com ─────
> │ "There does not now, nor will there ever, exist a programming
> │ language in which it is the least bit hard to write bad programs." ---
> │ Flon's Axiom
> --
> To unsubscribe from this list: send the line "unsubscribe linux-8086" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
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2012-10-26 14:28 idle process in x86 linux Xin Tong
2012-10-26 15:51 ` David Given
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