Linux kernel gain real time support...

sonnet · 19-10-2006, 13:51

http://news.softpedia.com/news/Linux...rt-37963.shtml
A quest indirizzo ho trovato questo articolo,solo che non mi e' molto chiaro il senso.Il problema non e' l'inglese...

Qcn sa spiegarmi che vantaggi apporta questo nuovo supporto "real time"?
Ma e' la stessa cosa al quale si riferisce quando si parla di SO real time?

TimeSys reports that an additional real-time technology will be incorporated into the mainline Linux kernel starting with version 2.6.18 of the Linux kernel. The real-time support, which previously had to be installed as kernel patches, was developed in part by TimeSys senior open source developer Thomas Gleixner, the company says. Thomas Gleixner was the main author of Linux's high-resolution timer subsystem, and has been a major contributor to Ingo Molnar's real-time preemption patch.

In the changelog for the 2.6.18 kernel, it is shown an addition of 136 patches from
Thomas Gleixner and 143 from Molnar, who works for Red Hat. According to
TimeSys, the latest kernel release includes real-time technology that will save individual kernel developers from having to maintain separate real-time kernel trees. Additionally, embedded Linux developers or normal desktop users wishing to build kernels capable of achieving millisecond-level real-time responsiveness will no longer have to apply patches.

"I am pleased that we can simplify development for real-time embedded devices by bringing this technology into the mainline kernel." - says Thomas Gleixner. The next releases of the Linux kernel are likely to offer additional real-time features that are currently only available as kernel patches, according to TimeSys, and they are already available through its LinuxLink suite of subscription-based online services for embedded Linux developers.

"The inclusion of real-time capabilities in the kernel validates the work of TimeSys in this space. Our customers that require real-time capabilities can be confident that they are on a path that has a clear future." - says TimeSys CEO, Larry Weidman. Weidman adds, "By making real-time extensions available to all LinuxLink customers, we hope to make a supported real-time solution affordable to a wider audience."

ilsensine · 19-10-2006, 14:30

L'intero ramo -RT di Molnar nel 2.6.18? Non mi risulta.

sonnet · 20-10-2006, 07:56

Quote:

Originariamente inviato da ilsensine

L'intero ramo -RT di Molnar nel 2.6.18? Non mi risulta.

nell'articolo..
Softpedia e' un sito affidabile per le news?

ilsensine · 20-10-2006, 08:23

Hanno introdotto una cosa importante, la gestione della "priority inversion" per i futex. E' importante ma non è tutto il lavoro di Molnar (che ha fatto molte altre cose).

ilsensine · 20-10-2006, 08:25

Poi molte (la maggior parte) delle patch di Molnar, se dai una occhiata al changelog, riguardano l'inserimento di lockdep: un mero - anche se molto utile - strumento di diagnostica.

19-10-2006, 13:51	#1
sonnet Senior Member Iscritto dal: Dec 2002 Città: Barletta Messaggi: 3495	Linux kernel gain real time support... http://news.softpedia.com/news/Linux...rt-37963.shtml A quest indirizzo ho trovato questo articolo,solo che non mi e' molto chiaro il senso.Il problema non e' l'inglese... Qcn sa spiegarmi che vantaggi apporta questo nuovo supporto "real time"? Ma e' la stessa cosa al quale si riferisce quando si parla di SO real time? TimeSys reports that an additional real-time technology will be incorporated into the mainline Linux kernel starting with version 2.6.18 of the Linux kernel. The real-time support, which previously had to be installed as kernel patches, was developed in part by TimeSys senior open source developer Thomas Gleixner, the company says. Thomas Gleixner was the main author of Linux's high-resolution timer subsystem, and has been a major contributor to Ingo Molnar's real-time preemption patch. In the changelog for the 2.6.18 kernel, it is shown an addition of 136 patches from Thomas Gleixner and 143 from Molnar, who works for Red Hat. According to TimeSys, the latest kernel release includes real-time technology that will save individual kernel developers from having to maintain separate real-time kernel trees. Additionally, embedded Linux developers or normal desktop users wishing to build kernels capable of achieving millisecond-level real-time responsiveness will no longer have to apply patches. "I am pleased that we can simplify development for real-time embedded devices by bringing this technology into the mainline kernel." - says Thomas Gleixner. The next releases of the Linux kernel are likely to offer additional real-time features that are currently only available as kernel patches, according to TimeSys, and they are already available through its LinuxLink suite of subscription-based online services for embedded Linux developers. "The inclusion of real-time capabilities in the kernel validates the work of TimeSys in this space. Our customers that require real-time capabilities can be confident that they are on a path that has a clear future." - says TimeSys CEO, Larry Weidman. Weidman adds, "By making real-time extensions available to all LinuxLink customers, we hope to make a supported real-time solution affordable to a wider audience." __________________ si lavora e si fatica..per la panza e per..!!

19-10-2006, 14:30	#2
ilsensine Senior Member Iscritto dal: Apr 2000 Città: Roma Messaggi: 15625	L'intero ramo -RT di Molnar nel 2.6.18? Non mi risulta. __________________ 0: or %edi, %ecx; adc %eax, (%edx); popf; je 0b-22; pop %ebx; fadds 0x56(%ecx); lds 0x56(%ebx), %esp; mov %al, %al andeqs pc, r1, #147456; blpl 0xff8dd280; ldrgtb r4, [r6, #-472]; addgt r5, r8, r3, ror #12

20-10-2006, 08:23	#4
ilsensine Senior Member Iscritto dal: Apr 2000 Città: Roma Messaggi: 15625	Hanno introdotto una cosa importante, la gestione della "priority inversion" per i futex. E' importante ma non è tutto il lavoro di Molnar (che ha fatto molte altre cose). __________________ 0: or %edi, %ecx; adc %eax, (%edx); popf; je 0b-22; pop %ebx; fadds 0x56(%ecx); lds 0x56(%ebx), %esp; mov %al, %al andeqs pc, r1, #147456; blpl 0xff8dd280; ldrgtb r4, [r6, #-472]; addgt r5, r8, r3, ror #12

20-10-2006, 08:25	#5
ilsensine Senior Member Iscritto dal: Apr 2000 Città: Roma Messaggi: 15625	Poi molte (la maggior parte) delle patch di Molnar, se dai una occhiata al changelog, riguardano l'inserimento di lockdep: un mero - anche se molto utile - strumento di diagnostica. __________________ 0: or %edi, %ecx; adc %eax, (%edx); popf; je 0b-22; pop %ebx; fadds 0x56(%ecx); lds 0x56(%ebx), %esp; mov %al, %al andeqs pc, r1, #147456; blpl 0xff8dd280; ldrgtb r4, [r6, #-472]; addgt r5, r8, r3, ror #12

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