From: kan.liang@linux.intel.com
To: peterz@infradead.org, acme@kernel.org, tglx@linutronix.de,
mingo@redhat.com, linux-kernel@vger.kernel.org
Cc: eranian@google.com, jolsa@redhat.com, namhyung@kernel.org,
ak@linux.intel.com, luto@amacapital.net,
Kan Liang <kan.liang@linux.intel.com>
Subject: [PATCH V4 09/13] perf/core, x86: Add support for PERF_SAMPLE_CODE_PAGE_SIZE
Date: Thu, 31 Jan 2019 12:28:02 -0800 [thread overview]
Message-ID: <1548966486-49963-9-git-send-email-kan.liang@linux.intel.com> (raw)
In-Reply-To: <1548966486-49963-1-git-send-email-kan.liang@linux.intel.com>
From: Stephane Eranian <eranian@google.com>
When studying code layout, it is useful to capture the page size of the
sampled code address.
Add a new sample type for code page size.
The new sample type requires collecting the ip. The code page size can
be calculated from the IRQ-safe perf_get_page_size().
Only the generic support is covered. The large PEBS will be disabled
with this sample type.
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
No changes since V3
include/linux/perf_event.h | 1 +
include/uapi/linux/perf_event.h | 4 +++-
kernel/events/core.c | 11 ++++++++++-
3 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 0e048ab..10c23f9 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -938,6 +938,7 @@ struct perf_sample_data {
u64 phys_addr;
u64 data_page_size;
+ u64 code_page_size;
} ____cacheline_aligned;
/* default value for data source */
diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index 0e8d222..045e218 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -142,8 +142,9 @@ enum perf_event_sample_format {
PERF_SAMPLE_REGS_INTR = 1U << 18,
PERF_SAMPLE_PHYS_ADDR = 1U << 19,
PERF_SAMPLE_DATA_PAGE_SIZE = 1U << 20,
+ PERF_SAMPLE_CODE_PAGE_SIZE = 1U << 21,
- PERF_SAMPLE_MAX = 1U << 21, /* non-ABI */
+ PERF_SAMPLE_MAX = 1U << 22, /* non-ABI */
__PERF_SAMPLE_CALLCHAIN_EARLY = 1ULL << 63, /* non-ABI; internal use */
};
@@ -865,6 +866,7 @@ enum perf_event_type {
* u64 regs[weight(mask)]; } && PERF_SAMPLE_REGS_INTR
* { u64 phys_addr;} && PERF_SAMPLE_PHYS_ADDR
* { u64 data_page_size;} && PERF_SAMPLE_DATA_PAGE_SIZE
+ * { u64 code_page_size;} && PERF_SAMPLE_CODE_PAGE_SIZE
* };
*/
PERF_RECORD_SAMPLE = 9,
diff --git a/kernel/events/core.c b/kernel/events/core.c
index d233f45..a1575b4 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -1756,6 +1756,9 @@ static void __perf_event_header_size(struct perf_event *event, u64 sample_type)
if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)
size += sizeof(data->data_page_size);
+ if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)
+ size += sizeof(data->code_page_size);
+
event->header_size = size;
}
@@ -6311,6 +6314,9 @@ void perf_output_sample(struct perf_output_handle *handle,
if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)
perf_output_put(handle, data->data_page_size);
+ if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)
+ perf_output_put(handle, data->code_page_size);
+
if (!event->attr.watermark) {
int wakeup_events = event->attr.wakeup_events;
@@ -6399,7 +6405,7 @@ void perf_prepare_sample(struct perf_event_header *header,
__perf_event_header__init_id(header, data, event);
- if (sample_type & PERF_SAMPLE_IP)
+ if (sample_type & (PERF_SAMPLE_IP | PERF_SAMPLE_CODE_PAGE_SIZE))
data->ip = perf_instruction_pointer(regs);
if (sample_type & PERF_SAMPLE_CALLCHAIN) {
@@ -6508,6 +6514,9 @@ void perf_prepare_sample(struct perf_event_header *header,
if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)
data->data_page_size = perf_get_page_size(data->addr);
+
+ if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)
+ data->code_page_size = perf_get_page_size(data->ip);
}
static __always_inline int
--
2.7.4
next prev parent reply other threads:[~2019-01-31 20:29 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-31 20:27 [PATCH V4 01/13] perf/core, x86: Add PERF_SAMPLE_DATA_PAGE_SIZE kan.liang
2019-01-31 20:27 ` [PATCH V4 02/13] perf tools: Support new sample type for data page size kan.liang
2019-01-31 20:27 ` [PATCH V4 03/13] perf script: Support " kan.liang
2019-01-31 20:27 ` [PATCH V4 04/13] perf sort: Add sort option for " kan.liang
2019-01-31 20:27 ` [PATCH V4 05/13] perf mem: Factor out a function to generate sort order kan.liang
2019-01-31 20:27 ` [PATCH V4 06/13] perf mem: Clean up output format kan.liang
2019-01-31 20:28 ` [PATCH V4 07/13] perf mem: Support data page size kan.liang
2019-01-31 20:28 ` [PATCH V4 08/13] perf test: Add test case for PERF_SAMPLE_DATA_PAGE_SIZE kan.liang
2019-01-31 20:28 ` kan.liang [this message]
2019-01-31 20:28 ` [PATCH V4 10/13] perf tools: Add support for PERF_SAMPLE_CODE_PAGE_SIZE kan.liang
2019-01-31 20:28 ` [PATCH V4 11/13] perf script: " kan.liang
2019-01-31 20:28 ` [PATCH V4 12/13] perf report: " kan.liang
2019-01-31 20:28 ` [PATCH V4 13/13] perf test: Add test case " kan.liang
2019-02-01 9:22 ` [PATCH V4 01/13] perf/core, x86: Add PERF_SAMPLE_DATA_PAGE_SIZE Peter Zijlstra
2019-02-01 10:03 ` Peter Zijlstra
2019-02-01 10:36 ` Kirill A. Shutemov
2019-02-01 12:43 ` Peter Zijlstra
2019-02-01 12:47 ` Peter Zijlstra
2019-02-01 16:16 ` Liang, Kan
2019-02-04 10:54 ` Peter Zijlstra
2019-02-06 20:23 ` Liang, Kan
2019-02-01 10:34 ` Kirill A. Shutemov
2019-02-01 14:45 ` Liang, Kan
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