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Groups > linux.kernel > #1217451 > unrolled thread
| Started by | Martin van Es <mrvanes@gmail.com> |
|---|---|
| First post | 2015-09-02 11:40 +0200 |
| Last post | 2015-09-02 16:50 +0200 |
| Articles | 5 — 2 participants |
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Only 1 cpu scheduled in 4.2.0 Martin van Es <mrvanes@gmail.com> - 2015-09-02 11:40 +0200
Re: Only 1 cpu scheduled in 4.2.0 Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-09-02 13:00 +0200
Re: Only 1 cpu scheduled in 4.2.0 Martin van Es <mrvanes@gmail.com> - 2015-09-02 13:40 +0200
Re: Only 1 cpu scheduled in 4.2.0 Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-09-02 13:50 +0200
Re: Only 1 cpu scheduled in 4.2.0 Martin van Es <mrvanes@gmail.com> - 2015-09-02 16:50 +0200
| From | Martin van Es <mrvanes@gmail.com> |
|---|---|
| Date | 2015-09-02 11:40 +0200 |
| Subject | Only 1 cpu scheduled in 4.2.0 |
| Message-ID | <q4cGo-17b-41@gated-at.bofh.it> |
Hi, I recently compiled 4.2.0 based on my previous 4.1.6 config (make oldconfig). On 4.1.6 all cores are equally scheduled. This new 4.2.0 kernel however only schedules cpu0 on my 4 cpu i7-3537U (which is actually 2 cores x 2HT, as far as I understand the specs). CPU1 is scheduled for 0.5% now and then, so it's not completely 0. I tried (re)enabling NUMA support, since that's adviced for 64bit/i7 cpu's according to the help text, but that didn't change anything. Did I miss a new option for SMP scheduling in 4.2.0? Best regards, Martin -- If 'but' was any useful, it would be a logic operator -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Mike Galbraith <umgwanakikbuti@gmail.com> |
|---|---|
| Date | 2015-09-02 13:00 +0200 |
| Message-ID | <q4dVM-2P4-7@gated-at.bofh.it> |
| In reply to | #1217451 |
On Wed, 2015-09-02 at 11:38 +0200, Martin van Es wrote: > Hi, > > I recently compiled 4.2.0 based on my previous 4.1.6 config (make oldconfig). > On 4.1.6 all cores are equally scheduled. Do you have CONFIG_NO_HZ_FULL_ALL enabled? -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Martin van Es <mrvanes@gmail.com> |
|---|---|
| Date | 2015-09-02 13:40 +0200 |
| Message-ID | <q4eyu-3NB-11@gated-at.bofh.it> |
| In reply to | #1217519 |
On Wed, Sep 2, 2015 at 12:50 PM, Mike Galbraith <umgwanakikbuti@gmail.com> wrote: > On Wed, 2015-09-02 at 11:38 +0200, Martin van Es wrote: >> Hi, >> >> I recently compiled 4.2.0 based on my previous 4.1.6 config (make oldconfig). >> On 4.1.6 all cores are equally scheduled. > > Do you have CONFIG_NO_HZ_FULL_ALL enabled? Yes, that's enabled. Martin -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Mike Galbraith <umgwanakikbuti@gmail.com> |
|---|---|
| Date | 2015-09-02 13:50 +0200 |
| Message-ID | <q4eI9-3YQ-9@gated-at.bofh.it> |
| In reply to | #1217538 |
On Wed, 2015-09-02 at 13:35 +0200, Martin van Es wrote: > On Wed, Sep 2, 2015 at 12:50 PM, Mike Galbraith > <umgwanakikbuti@gmail.com> wrote: > > On Wed, 2015-09-02 at 11:38 +0200, Martin van Es wrote: > >> Hi, > >> > >> I recently compiled 4.2.0 based on my previous 4.1.6 config (make oldconfig). > >> On 4.1.6 all cores are equally scheduled. > > > > Do you have CONFIG_NO_HZ_FULL_ALL enabled? > > Yes, that's enabled. Turn it off and you'll get your CPUs back. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Martin van Es <mrvanes@gmail.com> |
|---|---|
| Date | 2015-09-02 16:50 +0200 |
| Message-ID | <q4hwm-81p-9@gated-at.bofh.it> |
| In reply to | #1217542 |
On Wed, Sep 2, 2015 at 1:44 PM, Mike Galbraith <umgwanakikbuti@gmail.com> wrote: > On Wed, 2015-09-02 at 13:35 +0200, Martin van Es wrote: >> On Wed, Sep 2, 2015 at 12:50 PM, Mike Galbraith >> <umgwanakikbuti@gmail.com> wrote: >> > On Wed, 2015-09-02 at 11:38 +0200, Martin van Es wrote: >> >> Hi, >> >> >> >> I recently compiled 4.2.0 based on my previous 4.1.6 config (make oldconfig). >> >> On 4.1.6 all cores are equally scheduled. >> > >> > Do you have CONFIG_NO_HZ_FULL_ALL enabled? >> >> Yes, that's enabled. > > Turn it off and you'll get your CPUs back. Yay, all my CPU's are rumbling again! Thx! Martin -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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