kernel_liteos_a/drivers/BUILD.gn

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# Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
# Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this list of
# conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice, this list
# of conditions and the following disclaimer in the documentation and/or other materials
# provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors may be used
# to endorse or promote products derived from this software without specific prior written
# permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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import("//kernel/liteos_a/liteos.gni")
group("drivers") {
deps = [
"block/disk",
"char/bch",
"char/mem",
feat: L0-L1 支持Perf 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
2021-09-14 10:38:15 +08:00
"char/perf",
"char/quickstart",
"char/random",
"char/trace",
"char/video",
"mtd/multi_partition",
]
}
config("public") {
configs = [
"block/disk:public",
"char/bch:public",
"char/mem:public",
"char/quickstart:public",
"char/random:public",
"char/video:public",
"char/trace:public",
"mtd/multi_partition:public",
]
}