6e0a3f10bb
1.【需求描述】：
L0-L1 支持Perf，提供2种模式的配置， 及3大类型的事件配置：
2种模式：计数模式（仅统计事件发生次数）、采样模式（收集上下文如任务ID、pc、backtrace等）。
3种事件类型：CPU硬件事件（cycle、branch、icache、dcache等）、OS软件事件（task switch、mux pend、irq等）、高精度周期事件（cpu clock）。
2.【方案描述】：
L0:
基于事件采样原理，以性能事件为基础，当事件发生时，相应的事件计数器溢出发生中断，在中断处理函数中记录事件信息，包括当前的pc、当前运 行的任务ID以及调用栈等信息。
L1:
新增perf字符设备，位于“dev/perf”，通过对设备节点的read\ioctl,实现用户态perf
BREAKING CHANGE:
1.新增一系列perf的对外API，位于los_perf.h中.
LOS_PerfInit配置采样数据缓冲区
LOS_PerfStart开启Perf采样
LOS_PerfStop停止Perf采样
LOS_PerfConfig配置Perf采样事件
LOS_PerfDataRead读取采样数据
LOS_PerfNotifyHookReg 注册采样数据缓冲区的钩子函数
LOS_PerfFlushHookReg 注册缓冲区刷cache的钩子
2. 用户态新增perf命令
【Usage】:
./perf [start] /[start id] Start perf.
./perf [stop] Stop perf.
./perf [read nBytes] Read nBytes raw data from perf buffer and print out.
./perf [list] List events to be used in -e.
./perf [stat] or [record] <option> <command>
-e, event selector. use './perf list' to list available events.
-p, event period.
-o, perf data output filename.
-t, taskId filter(whiltelist), if not set perf will sample all tasks.
-s, type of data to sample defined in PerfSampleType los_perf.h.
-P, processId filter(whiltelist), if not set perf will sample all processes.
-d, whether to prescaler (once every 64 counts), which only take effect on cpu cycle hardware event.
Close #I47I9A
Signed-off-by: LiteOS2021 <dinglu@huawei.com>
Change-Id: Ieb9b7483c85d1495df7c55bc0027f4309dff9814
101 lines
2.6 KiB
Plaintext
101 lines
2.6 KiB
Plaintext
config KERNEL_EXTKERNEL
|
|
bool "Enable Extend Kernel"
|
|
default y
|
|
help
|
|
This option will enable extend Kernel of LiteOS. Extend kernel include
|
|
cppsupport, cpup, and dynload. You can select one or some
|
|
of them.
|
|
|
|
config KERNEL_CPPSUPPORT
|
|
bool "Enable C++ Support"
|
|
default y
|
|
depends on KERNEL_EXTKERNEL
|
|
help
|
|
If you wish to build LiteOS with support for C++.
|
|
|
|
config KERNEL_CPUP
|
|
bool "Enable Cpup"
|
|
default y
|
|
depends on KERNEL_EXTKERNEL
|
|
help
|
|
If you wish to build LiteOS with support for cpup.
|
|
|
|
config CPUP_INCLUDE_IRQ
|
|
bool "Enable Cpup include irq"
|
|
default y
|
|
depends on KERNEL_CPUP
|
|
help
|
|
If you wish to include irq usage for cpup.
|
|
|
|
config KERNEL_DYNLOAD
|
|
bool "Enable Dynamic Load Feature"
|
|
default y
|
|
depends on KERNEL_EXTKERNEL && KERNEL_VM && KERNEL_SYSCALL
|
|
help
|
|
If you wish to build LiteOS with support for dynamic load.
|
|
|
|
config ASLR
|
|
bool "Enable Address Space Layout Randomization"
|
|
default n
|
|
depends on KERNEL_DYNLOAD && HW_RANDOM_ENABLE
|
|
help
|
|
If you wish to enable ASLR for user aspace.
|
|
|
|
config KERNEL_PM
|
|
bool "Enable Power Management"
|
|
default y
|
|
depends on KERNEL_EXTKERNEL
|
|
help
|
|
If you wish to build LiteOS with support for power management.
|
|
|
|
config KERNEL_VDSO
|
|
bool "Enable VDSO Feature"
|
|
default n
|
|
depends on KERNEL_EXTKERNEL && KERNEL_VM && KERNEL_SYSCALL
|
|
help
|
|
If you wish to speed up some system calls.
|
|
|
|
config KERNEL_SHM
|
|
bool "Enable Shared Memory"
|
|
default y
|
|
depends on KERNEL_EXTKERNEL && KERNEL_VM && KERNEL_SYSCALL
|
|
help
|
|
Answer Y to enable LiteOS support shared memory.
|
|
|
|
config KERNEL_LITEIPC
|
|
bool "Enable liteipc"
|
|
default y
|
|
depends on KERNEL_EXTKERNEL && KERNEL_VM
|
|
help
|
|
Answer Y to enable LiteOS support liteipc.
|
|
|
|
config KERNEL_PIPE
|
|
bool "Enable pipes"
|
|
default y
|
|
depends on KERNEL_EXTKERNEL
|
|
help
|
|
Answer Y to enable LiteOS support pipes.
|
|
|
|
config BASE_CORE_HILOG
|
|
bool "Enable Hilog"
|
|
default y
|
|
depends on KERNEL_EXTKERNEL
|
|
help
|
|
If you wish to include hilog.
|
|
|
|
config KERNEL_HOOK
|
|
bool "Enable Hook Feature"
|
|
default n
|
|
depends on KERNEL_EXTKERNEL && DEBUG_VERSION
|
|
|
|
######################### config options of trace #########################
|
|
source "kernel/extended/trace/Kconfig"
|
|
|
|
######################### config options of blackbox #########################
|
|
source "kernel/extended/blackbox/Kconfig"
|
|
|
|
######################### config options of hidumper #########################
|
|
source "kernel/extended/hidumper/Kconfig"
|
|
|
|
######################### config options of perf #########################
|
|
source "kernel/extended/perf/Kconfig" |