* [PATCH] intel_idle: add idle values for Cherrytrail/Braswell
@ 2014-08-22 9:58 Mika Westerberg
2014-08-22 11:39 ` [PATCH v2] " Mika Westerberg
0 siblings, 1 reply; 7+ messages in thread
From: Mika Westerberg @ 2014-08-22 9:58 UTC (permalink / raw)
To: Len Brown; +Cc: Kumar Mahesh, Alan Cox, Mika Westerberg, linux-pm, linux-kernel
From: Kumar Mahesh <mahesh.kumar.p@intel.com>
Braswell is a successor of Intel Baytrail but has slighly different CPU
idle values and latencies.
Signed-off-by: Kumar Mahesh <mahesh.kumar.p@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
---
drivers/idle/intel_idle.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 58 insertions(+)
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 9b7ee7e427df..ae6f9f1cb700 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -536,6 +536,59 @@ static struct cpuidle_state atom_cstates[] = {
{
.enter = NULL }
};
+
+static struct cpuidle_state chv_cstates[CPUIDLE_STATE_MAX] = {
+ { /* MWAIT C1 */
+ .name = "C1-ATM",
+ .desc = "MWAIT 0x00",
+ .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID,
+ .exit_latency = 1,
+ .target_residency = 4,
+ .enter = &intel_idle },
+ { /* MWAIT C4 */
+ .name = "C4-ATM",
+ .desc = "MWAIT 0x30",
+ .flags = MWAIT2flg(0x30) | CPUIDLE_FLAG_TIME_VALID
+ | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 100,
+ .target_residency = 400,
+ .enter = &intel_idle },
+ { /* MWAIT C6 */
+ .name = "C6-ATM",
+ .desc = "MWAIT 0x52",
+ .flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TIME_VALID
+ | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 140,
+ .target_residency = 560,
+ .enter = &intel_idle },
+ { /* MWAIT C7-S0i1 */
+ .name = "S0i1-ATM",
+ .desc = "MWAIT 0x60",
+ .flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TIME_VALID
+ | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 1200,
+ .target_residency = 4000,
+ .enter = &intel_idle },
+ { /* MWAIT C8-S0i2 */
+ .name = "S0i2-ATM",
+ .desc = "MWAIT 0x62",
+ .flags = MWAIT2flg(0x62) | CPUIDLE_FLAG_TIME_VALID
+ | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 2000,
+ .target_residency = 8000,
+ .enter = &intel_idle },
+ { /* MWAIT C9-S0i3 */
+ .name = "S0i3-ATM",
+ .desc = "MWAIT 0x64",
+ .flags = MWAIT2flg(0x64) | CPUIDLE_FLAG_TIME_VALID
+ | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 10000,
+ .target_residency = 20000,
+ .enter = &intel_idle },
+ {
+ .enter = NULL }
+};
+
static struct cpuidle_state avn_cstates[] = {
{
.name = "C1-AVN",
@@ -702,6 +755,10 @@ static const struct idle_cpu idle_cpu_avn = {
.disable_promotion_to_c1e = true,
};
+static const struct idle_cpu idle_cpu_chv = {
+ .state_table = chv_cstates,
+};
+
#define ICPU(model, cpu) \
{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&cpu }
@@ -725,6 +782,7 @@ static const struct x86_cpu_id intel_idle_ids[] = {
ICPU(0x3f, idle_cpu_hsw),
ICPU(0x45, idle_cpu_hsw),
ICPU(0x46, idle_cpu_hsw),
+ ICPU(0x4c, idle_cpu_chv),
ICPU(0x4d, idle_cpu_avn),
ICPU(0x3d, idle_cpu_bdw),
ICPU(0x4f, idle_cpu_bdw),
--
2.1.0
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH v2] intel_idle: add idle values for Cherrytrail/Braswell
2014-08-22 9:58 [PATCH] intel_idle: add idle values for Cherrytrail/Braswell Mika Westerberg
@ 2014-08-22 11:39 ` Mika Westerberg
2014-08-22 14:06 ` Li, Aubrey
0 siblings, 1 reply; 7+ messages in thread
From: Mika Westerberg @ 2014-08-22 11:39 UTC (permalink / raw)
To: Len Brown
Cc: Kumar P Mahesh, Alan Cox, Mika Westerberg, linux-pm, linux-kernel
From: Mahesh Kumar P <mahesh.kumar.p@intel.com>
Cherrytrail/Braswell is a successor of Intel Baytrail but has slighly
different CPU idle values and latencies.
Signed-off-by: Kumar P Mahesh <mahesh.kumar.p@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
---
I learned from Mahesh that C1e, C4 and S0i2 states are deprecated so those
are now removed.
drivers/idle/intel_idle.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 9b7ee7e427df..e472580c1826 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -197,6 +197,42 @@ static struct cpuidle_state snb_cstates[] = {
.enter = NULL }
};
+static struct cpuidle_state cht_cstates[] = {
+ { /* MWAIT C1 */
+ .name = "C1-CHT",
+ .desc = "MWAIT 0x00",
+ .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID,
+ .exit_latency = 1,
+ .target_residency = 4,
+ .enter = &intel_idle },
+ { /* MWAIT C6 */
+ .name = "C6-CHT",
+ .desc = "MWAIT 0x52",
+ .flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TIME_VALID
+ | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 140,
+ .target_residency = 560,
+ .enter = &intel_idle },
+ { /* MWAIT C7-S0i1 */
+ .name = "S0i1-CHT",
+ .desc = "MWAIT 0x60",
+ .flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TIME_VALID
+ | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 1200,
+ .target_residency = 4000,
+ .enter = &intel_idle },
+ { /* MWAIT C9-S0i3 */
+ .name = "S0i3-CHT",
+ .desc = "MWAIT 0x64",
+ .flags = MWAIT2flg(0x64) | CPUIDLE_FLAG_TIME_VALID
+ | CPUIDLE_FLAG_TLB_FLUSHED,
+ .exit_latency = 10000,
+ .target_residency = 20000,
+ .enter = &intel_idle },
+ {
+ .enter = NULL }
+};
+
static struct cpuidle_state byt_cstates[] = {
{
.name = "C1-BYT",
@@ -677,6 +713,11 @@ static const struct idle_cpu idle_cpu_byt = {
.byt_auto_demotion_disable_flag = true,
};
+static const struct idle_cpu idle_cpu_cht = {
+ .state_table = cht_cstates,
+ .disable_promotion_to_c1e = true,
+};
+
static const struct idle_cpu idle_cpu_ivb = {
.state_table = ivb_cstates,
.disable_promotion_to_c1e = true,
@@ -725,6 +766,7 @@ static const struct x86_cpu_id intel_idle_ids[] = {
ICPU(0x3f, idle_cpu_hsw),
ICPU(0x45, idle_cpu_hsw),
ICPU(0x46, idle_cpu_hsw),
+ ICPU(0x4c, idle_cpu_cht),
ICPU(0x4d, idle_cpu_avn),
ICPU(0x3d, idle_cpu_bdw),
ICPU(0x4f, idle_cpu_bdw),
--
2.1.0
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH v2] intel_idle: add idle values for Cherrytrail/Braswell
2014-08-22 11:39 ` [PATCH v2] " Mika Westerberg
@ 2014-08-22 14:06 ` Li, Aubrey
2014-08-25 10:12 ` Mika Westerberg
0 siblings, 1 reply; 7+ messages in thread
From: Li, Aubrey @ 2014-08-22 14:06 UTC (permalink / raw)
To: Mika Westerberg, Len Brown
Cc: Kumar P Mahesh, Alan Cox, linux-pm, linux-kernel
On 2014/8/22 19:39, Mika Westerberg wrote:
> From: Mahesh Kumar P <mahesh.kumar.p@intel.com>
>
> Cherrytrail/Braswell is a successor of Intel Baytrail but has slighly
> different CPU idle values and latencies.
>
> Signed-off-by: Kumar P Mahesh <mahesh.kumar.p@intel.com>
> Signed-off-by: Alan Cox <alan@linux.intel.com>
> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> ---
> I learned from Mahesh that C1e, C4 and S0i2 states are deprecated so those
> are now removed.
If the platform has ACPI supported, I believe Len wants to see what
C-states number exported by ACPI.
Please boot the machine with "intel_idle.max_cstate=0" to disable
intel_idle, then post the output of the following commands
dmesg | grep idle
grep . /sys/devices/system/cpu/cpu0/cpuidle/*/*
Thanks,
-Aubrey
>
> drivers/idle/intel_idle.c | 42 ++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 42 insertions(+)
>
> diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
> index 9b7ee7e427df..e472580c1826 100644
> --- a/drivers/idle/intel_idle.c
> +++ b/drivers/idle/intel_idle.c
> @@ -197,6 +197,42 @@ static struct cpuidle_state snb_cstates[] = {
> .enter = NULL }
> };
>
> +static struct cpuidle_state cht_cstates[] = {
> + { /* MWAIT C1 */
> + .name = "C1-CHT",
> + .desc = "MWAIT 0x00",
> + .flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_TIME_VALID,
> + .exit_latency = 1,
> + .target_residency = 4,
> + .enter = &intel_idle },
> + { /* MWAIT C6 */
> + .name = "C6-CHT",
> + .desc = "MWAIT 0x52",
> + .flags = MWAIT2flg(0x52) | CPUIDLE_FLAG_TIME_VALID
> + | CPUIDLE_FLAG_TLB_FLUSHED,
> + .exit_latency = 140,
> + .target_residency = 560,
> + .enter = &intel_idle },
> + { /* MWAIT C7-S0i1 */
> + .name = "S0i1-CHT",
> + .desc = "MWAIT 0x60",
> + .flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TIME_VALID
> + | CPUIDLE_FLAG_TLB_FLUSHED,
> + .exit_latency = 1200,
> + .target_residency = 4000,
> + .enter = &intel_idle },
> + { /* MWAIT C9-S0i3 */
> + .name = "S0i3-CHT",
> + .desc = "MWAIT 0x64",
> + .flags = MWAIT2flg(0x64) | CPUIDLE_FLAG_TIME_VALID
> + | CPUIDLE_FLAG_TLB_FLUSHED,
> + .exit_latency = 10000,
> + .target_residency = 20000,
> + .enter = &intel_idle },
> + {
> + .enter = NULL }
> +};
> +
> static struct cpuidle_state byt_cstates[] = {
> {
> .name = "C1-BYT",
> @@ -677,6 +713,11 @@ static const struct idle_cpu idle_cpu_byt = {
> .byt_auto_demotion_disable_flag = true,
> };
>
> +static const struct idle_cpu idle_cpu_cht = {
> + .state_table = cht_cstates,
> + .disable_promotion_to_c1e = true,
> +};
> +
> static const struct idle_cpu idle_cpu_ivb = {
> .state_table = ivb_cstates,
> .disable_promotion_to_c1e = true,
> @@ -725,6 +766,7 @@ static const struct x86_cpu_id intel_idle_ids[] = {
> ICPU(0x3f, idle_cpu_hsw),
> ICPU(0x45, idle_cpu_hsw),
> ICPU(0x46, idle_cpu_hsw),
> + ICPU(0x4c, idle_cpu_cht),
> ICPU(0x4d, idle_cpu_avn),
> ICPU(0x3d, idle_cpu_bdw),
> ICPU(0x4f, idle_cpu_bdw),
>
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v2] intel_idle: add idle values for Cherrytrail/Braswell
2014-08-22 14:06 ` Li, Aubrey
@ 2014-08-25 10:12 ` Mika Westerberg
2014-08-26 2:38 ` Li, Aubrey
0 siblings, 1 reply; 7+ messages in thread
From: Mika Westerberg @ 2014-08-25 10:12 UTC (permalink / raw)
To: Li, Aubrey; +Cc: Len Brown, Kumar P Mahesh, Alan Cox, linux-pm, linux-kernel
On Fri, Aug 22, 2014 at 10:06:21PM +0800, Li, Aubrey wrote:
> On 2014/8/22 19:39, Mika Westerberg wrote:
> > From: Mahesh Kumar P <mahesh.kumar.p@intel.com>
> >
> > Cherrytrail/Braswell is a successor of Intel Baytrail but has slighly
> > different CPU idle values and latencies.
> >
> > Signed-off-by: Kumar P Mahesh <mahesh.kumar.p@intel.com>
> > Signed-off-by: Alan Cox <alan@linux.intel.com>
> > Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> > ---
> > I learned from Mahesh that C1e, C4 and S0i2 states are deprecated so those
> > are now removed.
>
> If the platform has ACPI supported, I believe Len wants to see what
> C-states number exported by ACPI.
>
> Please boot the machine with "intel_idle.max_cstate=0" to disable
> intel_idle, then post the output of the following commands
OK, here goes:
> dmesg | grep idle
[ 0.523624] cpuidle: using governor ladder
[ 0.528215] cpuidle: using governor menu
[ 16.649461] intel_idle: disabled
[ 16.736481] ACPI: acpi_idle registered with cpuidle
> grep . /sys/devices/system/cpu/cpu0/cpuidle/*/*
/sys/devices/system/cpu/cpu0/cpuidle/state0/desc:CPUIDLE CORE POLL IDLE
/sys/devices/system/cpu/cpu0/cpuidle/state0/disable:0
/sys/devices/system/cpu/cpu0/cpuidle/state0/latency:0
/sys/devices/system/cpu/cpu0/cpuidle/state0/name:POLL
/sys/devices/system/cpu/cpu0/cpuidle/state0/power:4294967295
/sys/devices/system/cpu/cpu0/cpuidle/state0/residency:0
/sys/devices/system/cpu/cpu0/cpuidle/state0/time:0
/sys/devices/system/cpu/cpu0/cpuidle/state0/usage:0
/sys/devices/system/cpu/cpu0/cpuidle/state1/desc:ACPI FFH INTEL MWAIT 0x0
/sys/devices/system/cpu/cpu0/cpuidle/state1/disable:0
/sys/devices/system/cpu/cpu0/cpuidle/state1/latency:1
/sys/devices/system/cpu/cpu0/cpuidle/state1/name:C1
/sys/devices/system/cpu/cpu0/cpuidle/state1/power:0
/sys/devices/system/cpu/cpu0/cpuidle/state1/residency:2
/sys/devices/system/cpu/cpu0/cpuidle/state1/time:1255076
/sys/devices/system/cpu/cpu0/cpuidle/state1/usage:763
/sys/devices/system/cpu/cpu0/cpuidle/state2/desc:ACPI FFH INTEL MWAIT 0x58
/sys/devices/system/cpu/cpu0/cpuidle/state2/disable:0
/sys/devices/system/cpu/cpu0/cpuidle/state2/latency:500
/sys/devices/system/cpu/cpu0/cpuidle/state2/name:C2
/sys/devices/system/cpu/cpu0/cpuidle/state2/power:0
/sys/devices/system/cpu/cpu0/cpuidle/state2/residency:1000
/sys/devices/system/cpu/cpu0/cpuidle/state2/time:1694866
/sys/devices/system/cpu/cpu0/cpuidle/state2/usage:639
/sys/devices/system/cpu/cpu0/cpuidle/state3/desc:ACPI FFH INTEL MWAIT 0x64
/sys/devices/system/cpu/cpu0/cpuidle/state3/disable:0
/sys/devices/system/cpu/cpu0/cpuidle/state3/latency:5000
/sys/devices/system/cpu/cpu0/cpuidle/state3/name:C3
/sys/devices/system/cpu/cpu0/cpuidle/state3/power:0
/sys/devices/system/cpu/cpu0/cpuidle/state3/residency:10000
/sys/devices/system/cpu/cpu0/cpuidle/state3/time:380547473
/sys/devices/system/cpu/cpu0/cpuidle/state3/usage:744
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v2] intel_idle: add idle values for Cherrytrail/Braswell
2014-08-25 10:12 ` Mika Westerberg
@ 2014-08-26 2:38 ` Li, Aubrey
2014-08-26 9:00 ` Mika Westerberg
0 siblings, 1 reply; 7+ messages in thread
From: Li, Aubrey @ 2014-08-26 2:38 UTC (permalink / raw)
To: Mika Westerberg
Cc: Len Brown, Kumar P Mahesh, Alan Cox, linux-pm, linux-kernel
On 2014/8/25 18:12, Mika Westerberg wrote:
> On Fri, Aug 22, 2014 at 10:06:21PM +0800, Li, Aubrey wrote:
>> On 2014/8/22 19:39, Mika Westerberg wrote:
>>> From: Mahesh Kumar P <mahesh.kumar.p@intel.com>
>>>
>>> Cherrytrail/Braswell is a successor of Intel Baytrail but has slighly
>>> different CPU idle values and latencies.
>>>
>>> Signed-off-by: Kumar P Mahesh <mahesh.kumar.p@intel.com>
>>> Signed-off-by: Alan Cox <alan@linux.intel.com>
>>> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
>>> ---
>>> I learned from Mahesh that C1e, C4 and S0i2 states are deprecated so those
>>> are now removed.
>>
>> If the platform has ACPI supported, I believe Len wants to see what
>> C-states number exported by ACPI.
>>
>> Please boot the machine with "intel_idle.max_cstate=0" to disable
>> intel_idle, then post the output of the following commands
>
> OK, here goes:
ACPI exposes 0x58 as C6 mwait hint while the patch proposes 0x52 for C6.
Can you please remove "intel_idle.max_cstate=0" and run "dmesg | grep
idle" again to see how many C6 supports in CPUID enumeration?
Thanks,
-Aubrey
>
>> dmesg | grep idle
>
> [ 0.523624] cpuidle: using governor ladder
> [ 0.528215] cpuidle: using governor menu
> [ 16.649461] intel_idle: disabled
> [ 16.736481] ACPI: acpi_idle registered with cpuidle
>
>> grep . /sys/devices/system/cpu/cpu0/cpuidle/*/*
>
> /sys/devices/system/cpu/cpu0/cpuidle/state0/desc:CPUIDLE CORE POLL IDLE
> /sys/devices/system/cpu/cpu0/cpuidle/state0/disable:0
> /sys/devices/system/cpu/cpu0/cpuidle/state0/latency:0
> /sys/devices/system/cpu/cpu0/cpuidle/state0/name:POLL
> /sys/devices/system/cpu/cpu0/cpuidle/state0/power:4294967295
> /sys/devices/system/cpu/cpu0/cpuidle/state0/residency:0
> /sys/devices/system/cpu/cpu0/cpuidle/state0/time:0
> /sys/devices/system/cpu/cpu0/cpuidle/state0/usage:0
> /sys/devices/system/cpu/cpu0/cpuidle/state1/desc:ACPI FFH INTEL MWAIT 0x0
> /sys/devices/system/cpu/cpu0/cpuidle/state1/disable:0
> /sys/devices/system/cpu/cpu0/cpuidle/state1/latency:1
> /sys/devices/system/cpu/cpu0/cpuidle/state1/name:C1
> /sys/devices/system/cpu/cpu0/cpuidle/state1/power:0
> /sys/devices/system/cpu/cpu0/cpuidle/state1/residency:2
> /sys/devices/system/cpu/cpu0/cpuidle/state1/time:1255076
> /sys/devices/system/cpu/cpu0/cpuidle/state1/usage:763
> /sys/devices/system/cpu/cpu0/cpuidle/state2/desc:ACPI FFH INTEL MWAIT 0x58
> /sys/devices/system/cpu/cpu0/cpuidle/state2/disable:0
> /sys/devices/system/cpu/cpu0/cpuidle/state2/latency:500
> /sys/devices/system/cpu/cpu0/cpuidle/state2/name:C2
> /sys/devices/system/cpu/cpu0/cpuidle/state2/power:0
> /sys/devices/system/cpu/cpu0/cpuidle/state2/residency:1000
> /sys/devices/system/cpu/cpu0/cpuidle/state2/time:1694866
> /sys/devices/system/cpu/cpu0/cpuidle/state2/usage:639
> /sys/devices/system/cpu/cpu0/cpuidle/state3/desc:ACPI FFH INTEL MWAIT 0x64
> /sys/devices/system/cpu/cpu0/cpuidle/state3/disable:0
> /sys/devices/system/cpu/cpu0/cpuidle/state3/latency:5000
> /sys/devices/system/cpu/cpu0/cpuidle/state3/name:C3
> /sys/devices/system/cpu/cpu0/cpuidle/state3/power:0
> /sys/devices/system/cpu/cpu0/cpuidle/state3/residency:10000
> /sys/devices/system/cpu/cpu0/cpuidle/state3/time:380547473
> /sys/devices/system/cpu/cpu0/cpuidle/state3/usage:744
> --
> 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/
>
>
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v2] intel_idle: add idle values for Cherrytrail/Braswell
2014-08-26 2:38 ` Li, Aubrey
@ 2014-08-26 9:00 ` Mika Westerberg
2014-08-27 0:03 ` Li, Aubrey
0 siblings, 1 reply; 7+ messages in thread
From: Mika Westerberg @ 2014-08-26 9:00 UTC (permalink / raw)
To: Li, Aubrey; +Cc: Len Brown, Kumar P Mahesh, Alan Cox, linux-pm, linux-kernel
On Tue, Aug 26, 2014 at 10:38:32AM +0800, Li, Aubrey wrote:
> On 2014/8/25 18:12, Mika Westerberg wrote:
> > On Fri, Aug 22, 2014 at 10:06:21PM +0800, Li, Aubrey wrote:
> >> On 2014/8/22 19:39, Mika Westerberg wrote:
> >>> From: Mahesh Kumar P <mahesh.kumar.p@intel.com>
> >>>
> >>> Cherrytrail/Braswell is a successor of Intel Baytrail but has slighly
> >>> different CPU idle values and latencies.
> >>>
> >>> Signed-off-by: Kumar P Mahesh <mahesh.kumar.p@intel.com>
> >>> Signed-off-by: Alan Cox <alan@linux.intel.com>
> >>> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> >>> ---
> >>> I learned from Mahesh that C1e, C4 and S0i2 states are deprecated so those
> >>> are now removed.
> >>
> >> If the platform has ACPI supported, I believe Len wants to see what
> >> C-states number exported by ACPI.
> >>
> >> Please boot the machine with "intel_idle.max_cstate=0" to disable
> >> intel_idle, then post the output of the following commands
> >
> > OK, here goes:
>
> ACPI exposes 0x58 as C6 mwait hint while the patch proposes 0x52 for C6.
> Can you please remove "intel_idle.max_cstate=0" and run "dmesg | grep
> idle" again to see how many C6 supports in CPUID enumeration?
[ 16.685769] intel_idle: MWAIT substates: 0x33000020
[ 16.691236] intel_idle: v0.4 model 0x4C
[ 16.695539] intel_idle: lapic_timer_reliable_states 0xffffffff
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v2] intel_idle: add idle values for Cherrytrail/Braswell
2014-08-26 9:00 ` Mika Westerberg
@ 2014-08-27 0:03 ` Li, Aubrey
0 siblings, 0 replies; 7+ messages in thread
From: Li, Aubrey @ 2014-08-27 0:03 UTC (permalink / raw)
To: Mika Westerberg
Cc: Len Brown, Kumar P Mahesh, Alan Cox, linux-pm, linux-kernel
On 2014/8/26 17:00, Mika Westerberg wrote:
> On Tue, Aug 26, 2014 at 10:38:32AM +0800, Li, Aubrey wrote:
>> On 2014/8/25 18:12, Mika Westerberg wrote:
>>> On Fri, Aug 22, 2014 at 10:06:21PM +0800, Li, Aubrey wrote:
>>>> On 2014/8/22 19:39, Mika Westerberg wrote:
>>>>> From: Mahesh Kumar P <mahesh.kumar.p@intel.com>
>>>>>
>>>>> Cherrytrail/Braswell is a successor of Intel Baytrail but has slighly
>>>>> different CPU idle values and latencies.
>>>>>
>>>>> Signed-off-by: Kumar P Mahesh <mahesh.kumar.p@intel.com>
>>>>> Signed-off-by: Alan Cox <alan@linux.intel.com>
>>>>> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
>>>>> ---
>>>>> I learned from Mahesh that C1e, C4 and S0i2 states are deprecated so those
>>>>> are now removed.
>>>>
>>>> If the platform has ACPI supported, I believe Len wants to see what
>>>> C-states number exported by ACPI.
>>>>
>>>> Please boot the machine with "intel_idle.max_cstate=0" to disable
>>>> intel_idle, then post the output of the following commands
>>>
>>> OK, here goes:
>>
>> ACPI exposes 0x58 as C6 mwait hint while the patch proposes 0x52 for C6.
>> Can you please remove "intel_idle.max_cstate=0" and run "dmesg | grep
>> idle" again to see how many C6 supports in CPUID enumeration?
>
> [ 16.685769] intel_idle: MWAIT substates: 0x33000020
> [ 16.691236] intel_idle: v0.4 model 0x4C
> [ 16.695539] intel_idle: lapic_timer_reliable_states 0xffffffff
>
enough to turn over to Len to finalize, thanks Mika.
-Aubrey
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2014-08-27 0:04 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-08-22 9:58 [PATCH] intel_idle: add idle values for Cherrytrail/Braswell Mika Westerberg
2014-08-22 11:39 ` [PATCH v2] " Mika Westerberg
2014-08-22 14:06 ` Li, Aubrey
2014-08-25 10:12 ` Mika Westerberg
2014-08-26 2:38 ` Li, Aubrey
2014-08-26 9:00 ` Mika Westerberg
2014-08-27 0:03 ` Li, Aubrey
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