Re: [PATCH V4 08/16] perf, x86: allocate space for storing LBR stack

2014-07-07 Thread Yan, Zheng 
please ignore this patch

On 07/07/2014 02:28 PM, Yan, Zheng wrote:
> When the LBR call stack is enabled, it is necessary to save/restore
> the LBR stack on context switch. We can use pmu specific data to
> store LBR stack when task is scheduled out. This patch adds code
> that allocates the pmu specific data.
> 
> Signed-off-by: Yan, Zheng 
> Reviewed-by: Stephane Eranian 
> ---
>  arch/x86/kernel/cpu/perf_event.c | 1 +
>  arch/x86/kernel/cpu/perf_event.h | 7 +++
>  2 files changed, 8 insertions(+)
> 
> diff --git a/arch/x86/kernel/cpu/perf_event.c 
> b/arch/x86/kernel/cpu/perf_event.c
> index 8868e9b..2008c2a 100644
> --- a/arch/x86/kernel/cpu/perf_event.c
> +++ b/arch/x86/kernel/cpu/perf_event.c
> @@ -1907,6 +1907,7 @@ static struct pmu pmu = {
>  
>   .event_idx  = x86_pmu_event_idx,
>   .sched_task = x86_pmu_sched_task,
> + .task_ctx_size  = sizeof(struct x86_perf_task_context),
>  };
>  
>  void arch_perf_update_userpage(struct perf_event_mmap_page *userpg, u64 now)
> diff --git a/arch/x86/kernel/cpu/perf_event.h 
> b/arch/x86/kernel/cpu/perf_event.h
> index cc25819..b0eabca 100644
> --- a/arch/x86/kernel/cpu/perf_event.h
> +++ b/arch/x86/kernel/cpu/perf_event.h
> @@ -472,6 +472,13 @@ struct x86_pmu {
>   struct perf_guest_switch_msr *(*guest_get_msrs)(int *nr);
>  };
>  
> +struct x86_perf_task_context {
> + u64 lbr_from[MAX_LBR_ENTRIES];
> + u64 lbr_to[MAX_LBR_ENTRIES];
> + int lbr_callstack_users;
> + int lbr_stack_state;
> +};
> +
>  enum {
>   PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT = PERF_SAMPLE_BRANCH_MAX_SHIFT,
>   PERF_SAMPLE_BRANCH_SELECT_MAP_SIZE,
> 

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[PATCH V4 08/16] perf, x86: allocate space for storing LBR stack

2014-07-07 Thread Yan, Zheng 
When the LBR call stack is enabled, it is necessary to save/restore
the LBR stack on context switch. We can use pmu specific data to
store LBR stack when task is scheduled out. This patch adds code
that allocates the pmu specific data.

Signed-off-by: Yan, Zheng 
Reviewed-by: Stephane Eranian 
---
 arch/x86/kernel/cpu/perf_event.c | 1 +
 arch/x86/kernel/cpu/perf_event.h | 7 +++
 2 files changed, 8 insertions(+)

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 8868e9b..2008c2a 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1907,6 +1907,7 @@ static struct pmu pmu = {
 
.event_idx  = x86_pmu_event_idx,
.sched_task = x86_pmu_sched_task,
+   .task_ctx_size  = sizeof(struct x86_perf_task_context),
 };
 
 void arch_perf_update_userpage(struct perf_event_mmap_page *userpg, u64 now)
diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index cc25819..b0eabca 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -472,6 +472,13 @@ struct x86_pmu {
struct perf_guest_switch_msr *(*guest_get_msrs)(int *nr);
 };
 
+struct x86_perf_task_context {
+   u64 lbr_from[MAX_LBR_ENTRIES];
+   u64 lbr_to[MAX_LBR_ENTRIES];
+   int lbr_callstack_users;
+   int lbr_stack_state;
+};
+
 enum {
PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT = PERF_SAMPLE_BRANCH_MAX_SHIFT,
PERF_SAMPLE_BRANCH_SELECT_MAP_SIZE,
-- 
1.9.0

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[PATCH V4 08/16] perf, x86: allocate space for storing LBR stack

2014-07-07 Thread Yan, Zheng 
When the LBR call stack is enabled, it is necessary to save/restore
the LBR stack on context switch. We can use pmu specific data to
store LBR stack when task is scheduled out. This patch adds code
that allocates the pmu specific data.

Signed-off-by: Yan, Zheng zheng.z@intel.com
Reviewed-by: Stephane Eranian eran...@google.com
---
 arch/x86/kernel/cpu/perf_event.c | 1 +
 arch/x86/kernel/cpu/perf_event.h | 7 +++
 2 files changed, 8 insertions(+)

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 8868e9b..2008c2a 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1907,6 +1907,7 @@ static struct pmu pmu = {
 
.event_idx  = x86_pmu_event_idx,
.sched_task = x86_pmu_sched_task,
+   .task_ctx_size  = sizeof(struct x86_perf_task_context),
 };
 
 void arch_perf_update_userpage(struct perf_event_mmap_page *userpg, u64 now)
diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index cc25819..b0eabca 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -472,6 +472,13 @@ struct x86_pmu {
struct perf_guest_switch_msr *(*guest_get_msrs)(int *nr);
 };
 
+struct x86_perf_task_context {
+   u64 lbr_from[MAX_LBR_ENTRIES];
+   u64 lbr_to[MAX_LBR_ENTRIES];
+   int lbr_callstack_users;
+   int lbr_stack_state;
+};
+
 enum {
PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT = PERF_SAMPLE_BRANCH_MAX_SHIFT,
PERF_SAMPLE_BRANCH_SELECT_MAP_SIZE,
-- 
1.9.0

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Re: [PATCH V4 08/16] perf, x86: allocate space for storing LBR stack

2014-07-07 Thread Yan, Zheng 
please ignore this patch

On 07/07/2014 02:28 PM, Yan, Zheng wrote:
 When the LBR call stack is enabled, it is necessary to save/restore
 the LBR stack on context switch. We can use pmu specific data to
 store LBR stack when task is scheduled out. This patch adds code
 that allocates the pmu specific data.
 
 Signed-off-by: Yan, Zheng zheng.z@intel.com
 Reviewed-by: Stephane Eranian eran...@google.com
 ---
  arch/x86/kernel/cpu/perf_event.c | 1 +
  arch/x86/kernel/cpu/perf_event.h | 7 +++
  2 files changed, 8 insertions(+)
 
 diff --git a/arch/x86/kernel/cpu/perf_event.c 
 b/arch/x86/kernel/cpu/perf_event.c
 index 8868e9b..2008c2a 100644
 --- a/arch/x86/kernel/cpu/perf_event.c
 +++ b/arch/x86/kernel/cpu/perf_event.c
 @@ -1907,6 +1907,7 @@ static struct pmu pmu = {
  
   .event_idx  = x86_pmu_event_idx,
   .sched_task = x86_pmu_sched_task,
 + .task_ctx_size  = sizeof(struct x86_perf_task_context),
  };
  
  void arch_perf_update_userpage(struct perf_event_mmap_page *userpg, u64 now)
 diff --git a/arch/x86/kernel/cpu/perf_event.h 
 b/arch/x86/kernel/cpu/perf_event.h
 index cc25819..b0eabca 100644
 --- a/arch/x86/kernel/cpu/perf_event.h
 +++ b/arch/x86/kernel/cpu/perf_event.h
 @@ -472,6 +472,13 @@ struct x86_pmu {
   struct perf_guest_switch_msr *(*guest_get_msrs)(int *nr);
  };
  
 +struct x86_perf_task_context {
 + u64 lbr_from[MAX_LBR_ENTRIES];
 + u64 lbr_to[MAX_LBR_ENTRIES];
 + int lbr_callstack_users;
 + int lbr_stack_state;
 +};
 +
  enum {
   PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT = PERF_SAMPLE_BRANCH_MAX_SHIFT,
   PERF_SAMPLE_BRANCH_SELECT_MAP_SIZE,
 

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[PATCH V4 08/16] perf, x86: allocate space for storing LBR stack

2014-06-30 Thread Yan, Zheng 
When the LBR call stack is enabled, it is necessary to save/restore
the LBR stack on context switch. We can use pmu specific data to
store LBR stack when task is scheduled out. This patch adds code
that allocates the pmu specific data.

Signed-off-by: Yan, Zheng 
Reviewed-by: Stephane Eranian 
---
 arch/x86/kernel/cpu/perf_event.c | 1 +
 arch/x86/kernel/cpu/perf_event.h | 7 +++
 2 files changed, 8 insertions(+)

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 8868e9b..2008c2a 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1907,6 +1907,7 @@ static struct pmu pmu = {
 
.event_idx  = x86_pmu_event_idx,
.sched_task = x86_pmu_sched_task,
+   .task_ctx_size  = sizeof(struct x86_perf_task_context),
 };
 
 void arch_perf_update_userpage(struct perf_event_mmap_page *userpg, u64 now)
diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index cc25819..b0eabca 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -472,6 +472,13 @@ struct x86_pmu {
struct perf_guest_switch_msr *(*guest_get_msrs)(int *nr);
 };
 
+struct x86_perf_task_context {
+   u64 lbr_from[MAX_LBR_ENTRIES];
+   u64 lbr_to[MAX_LBR_ENTRIES];
+   int lbr_callstack_users;
+   int lbr_stack_state;
+};
+
 enum {
PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT = PERF_SAMPLE_BRANCH_MAX_SHIFT,
PERF_SAMPLE_BRANCH_SELECT_MAP_SIZE,
-- 
1.9.0

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[PATCH V4 08/16] perf, x86: allocate space for storing LBR stack

2014-06-30 Thread Yan, Zheng 
When the LBR call stack is enabled, it is necessary to save/restore
the LBR stack on context switch. We can use pmu specific data to
store LBR stack when task is scheduled out. This patch adds code
that allocates the pmu specific data.

Signed-off-by: Yan, Zheng zheng.z@intel.com
Reviewed-by: Stephane Eranian eran...@google.com
---
 arch/x86/kernel/cpu/perf_event.c | 1 +
 arch/x86/kernel/cpu/perf_event.h | 7 +++
 2 files changed, 8 insertions(+)

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 8868e9b..2008c2a 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1907,6 +1907,7 @@ static struct pmu pmu = {
 
.event_idx  = x86_pmu_event_idx,
.sched_task = x86_pmu_sched_task,
+   .task_ctx_size  = sizeof(struct x86_perf_task_context),
 };
 
 void arch_perf_update_userpage(struct perf_event_mmap_page *userpg, u64 now)
diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index cc25819..b0eabca 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -472,6 +472,13 @@ struct x86_pmu {
struct perf_guest_switch_msr *(*guest_get_msrs)(int *nr);
 };
 
+struct x86_perf_task_context {
+   u64 lbr_from[MAX_LBR_ENTRIES];
+   u64 lbr_to[MAX_LBR_ENTRIES];
+   int lbr_callstack_users;
+   int lbr_stack_state;
+};
+
 enum {
PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT = PERF_SAMPLE_BRANCH_MAX_SHIFT,
PERF_SAMPLE_BRANCH_SELECT_MAP_SIZE,
-- 
1.9.0

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[PATCH v4 08/16] perf, x86: allocate space for storing LBR stack

2014-03-17 Thread Yan, Zheng 
When the LBR call stack is enabled, it is necessary to save/restore
the LBR stack on context switch. We can use pmu specific data to
store LBR stack when task is scheduled out. This patch adds code
that allocates the pmu specific data.

Signed-off-by: Yan, Zheng 
Reviewed-by: Stephane Eranian 
---
 arch/x86/kernel/cpu/perf_event.c | 1 +
 arch/x86/kernel/cpu/perf_event.h | 7 +++
 2 files changed, 8 insertions(+)

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index b643823..978c055 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1905,6 +1905,7 @@ static struct pmu pmu = {
 
.event_idx  = x86_pmu_event_idx,
.sched_task = x86_pmu_sched_task,
+   .task_ctx_size  = sizeof(struct x86_perf_task_context),
 };
 
 void arch_perf_update_userpage(struct perf_event_mmap_page *userpg, u64 now)
diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index cc25819..b0eabca 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -472,6 +472,13 @@ struct x86_pmu {
struct perf_guest_switch_msr *(*guest_get_msrs)(int *nr);
 };
 
+struct x86_perf_task_context {
+   u64 lbr_from[MAX_LBR_ENTRIES];
+   u64 lbr_to[MAX_LBR_ENTRIES];
+   int lbr_callstack_users;
+   int lbr_stack_state;
+};
+
 enum {
PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT = PERF_SAMPLE_BRANCH_MAX_SHIFT,
PERF_SAMPLE_BRANCH_SELECT_MAP_SIZE,
-- 
1.8.5.3

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[PATCH v4 08/16] perf, x86: allocate space for storing LBR stack

2014-03-17 Thread Yan, Zheng 
When the LBR call stack is enabled, it is necessary to save/restore
the LBR stack on context switch. We can use pmu specific data to
store LBR stack when task is scheduled out. This patch adds code
that allocates the pmu specific data.

Signed-off-by: Yan, Zheng zheng.z@intel.com
Reviewed-by: Stephane Eranian eran...@google.com
---
 arch/x86/kernel/cpu/perf_event.c | 1 +
 arch/x86/kernel/cpu/perf_event.h | 7 +++
 2 files changed, 8 insertions(+)

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index b643823..978c055 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1905,6 +1905,7 @@ static struct pmu pmu = {
 
.event_idx  = x86_pmu_event_idx,
.sched_task = x86_pmu_sched_task,
+   .task_ctx_size  = sizeof(struct x86_perf_task_context),
 };
 
 void arch_perf_update_userpage(struct perf_event_mmap_page *userpg, u64 now)
diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index cc25819..b0eabca 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -472,6 +472,13 @@ struct x86_pmu {
struct perf_guest_switch_msr *(*guest_get_msrs)(int *nr);
 };
 
+struct x86_perf_task_context {
+   u64 lbr_from[MAX_LBR_ENTRIES];
+   u64 lbr_to[MAX_LBR_ENTRIES];
+   int lbr_callstack_users;
+   int lbr_stack_state;
+};
+
 enum {
PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT = PERF_SAMPLE_BRANCH_MAX_SHIFT,
PERF_SAMPLE_BRANCH_SELECT_MAP_SIZE,
-- 
1.8.5.3

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