Mirrors_Framework/nuttx
1
0
Fork 0
mirror of https://github.com/apache/nuttx.git synced 2026-06-05 15:58:59 +08:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

sched/note: Move the circle buffer code to driver

Browse Source 
so the format code can be shared by different transport

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This commit is contained in:
Xiang Xiao
2020-08-07 02:57:30 +08:00
committed by liuguo09
parent f99719e260
commit 952af92690
20 changed files with 540 additions and 456 deletions
Download Patch File Download Diff File Expand all files Collapse all files
sched/Kconfig
-55
View File
@@ -914,8 +914,6 @@ config SCHED_INSTRUMENTATION
done in these interfaces. For example, normal devices may not be
used; syslog output cannot be performed.
An option is to use SCHED_INSTRUMENTATION_BUFFER below.
if SCHED_INSTRUMENTATION
config SCHED_INSTRUMENTATION_CPUSET
@@ -977,59 +975,6 @@ config SCHED_INSTRUMENTATION_IRQHANDLER
void sched_note_irqhandler(int irq, FAR void *handler, bool enter);
config SCHED_INSTRUMENTATION_BUFFER
bool "Buffer instrumentation data in memory"
default n
---help---
If this option is selected, then in-memory buffering logic is
enabled to capture scheduler instrumentation data. This has
the advantage that (1) the platform logic does not have to provide
the sched_note_* interfaces described for the previous settings.
Instead, the buffering logic catches all of these. It encodes
timestamps the scheduler note and adds the note to an in-memory,
circular buffer. And (2) buffering the scheduler instrumentation
data (versus performing some output operation) minimizes the impact
of the instrumentation on the behavior of the system.
If the in-memory buffer becomes full, then older notes are
overwritten by newer notes. The following interface is provided:
ssize_t sched_note_get(FAR uint8_t *buffer, size_t buflen);
Platform specific information must call this function and dispose
of it quickly so that overwriting of the tail of the circular buffer
does not occur. See include/nuttx/sched_note.h for additional
information.
if SCHED_INSTRUMENTATION_BUFFER
config SCHED_NOTE_BUFSIZE
int "Instrumentation buffer size"
default 2048
---help---
The size of the in-memory, circular instrumentation buffer (in
bytes).
config SCHED_NOTE_GET
bool "Callable interface to get instrumentation data"
default n
depends on !SCHED_INSTRUMENTATION_CSECTION && (!SCHED_INSTRUMENTATION_SPINLOCK || !SMP)
---help---
Add support for interfaces to get the size of the next note and also
to extract the next note from the instrumentation buffer:
ssize_t sched_note_get(FAR uint8_t *buffer, size_t buflen);
ssize_t sched_note_size(void);
NOTE: This option is not available if critical sections are being
monitor (nor if spinlocks are being monitored in SMP configuration)
because there would be a logical error in the design in those cases.
That error is that these interfaces call enter_ and leave_critical_section
(and which us spinlocks in SMP mode). That means that each call to
sched_note_get() causes several additional entries to be added from
the note buffer in order to remove one entry.
endif # SCHED_INSTRUMENTATION_BUFFER
endif # SCHED_INSTRUMENTATION
endmenu # Performance Monitoring