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feat: L0-L1 支持Perf

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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
This commit is contained in:
LiteOS2021
2021-09-14 10:38:15 +08:00
parent 92f33ab9c4
commit 6e0a3f10bb
54 changed files with 4690 additions and 35 deletions
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drivers/char/perf/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;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import("//kernel/liteos_a/liteos.gni")
module_switch = defined(LOSCFG_DRIVERS_PERF)
module_name = "perf_dev"
kernel_module(module_name) {
sources = [ "src/perf.c" ]
public_configs = [ ":public" ]
}
config("public") {
include_dirs = [ "include" ]
}
drivers/char/perf/Kconfig
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config DRIVERS_PERF
bool "Enable PERF DRIVER"
default y
depends on DRIVERS && FS_VFS && KERNEL_PERF
help
Answer Y to enable LiteOS support perf in userspace.
drivers/char/perf/Makefile
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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;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
include $(LITEOSTOPDIR)/config.mk
MODULE_NAME := perf_dev
LOCAL_SRCS := $(wildcard src/*.c)
include $(MODULE)
drivers/char/perf/include/los_dev_perf.h
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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;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __LOS_DEV_PERF_H__
#define __LOS_DEV_PERF_H__
#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */
int DevPerfRegister(void);
#ifdef __cplusplus
#if __cplusplus
}
#endif /* __cplusplus */
#endif /* __cplusplus */
#endif
drivers/char/perf/src/perf.c
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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;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "fcntl.h"
#include "user_copy.h"
#include "sys/ioctl.h"
#include "fs/driver.h"
#include "los_dev_perf.h"
#include "los_perf.h"
#include "los_init.h"
#define PERF_DRIVER "/dev/perf"
#define PERF_DRIVER_MODE 0666
/* perf ioctl */
#define PERF_IOC_MAGIC 'T'
#define PERF_START _IO(PERF_IOC_MAGIC, 1)
#define PERF_STOP _IO(PERF_IOC_MAGIC, 2)
static int PerfOpen(struct file *filep)
{
(void)filep;
return 0;
}
static int PerfClose(struct file *filep)
{
(void)filep;
return 0;
}
static ssize_t PerfRead(struct file *filep, char *buffer, size_t buflen)
{
/* perf record buffer read */
(void)filep;
int ret;
int realLen;
char *records = LOS_MemAlloc(m_aucSysMem0, buflen);
if (records == NULL) {
return -ENOMEM;
}
realLen = LOS_PerfDataRead(records, buflen); /* get sample data */
if (realLen == 0) {
PRINT_ERR("Perf read failed, check whether perf is configured to sample mode.\n");
ret = -EINVAL;
goto EXIT;
}
ret = LOS_CopyFromKernel((void *)buffer, buflen, (void *)records, realLen);
if (ret != 0) {
ret = -EINVAL;
goto EXIT;
}
ret = realLen;
EXIT:
LOS_MemFree(m_aucSysMem0, records);
return ret;
}
static ssize_t PerfConfig(struct file *filep, const char *buffer, size_t buflen)
{
(void)filep;
int ret;
PerfConfigAttr attr = {0};
int attrlen = sizeof(PerfConfigAttr);
if (buflen != attrlen) {
PRINT_ERR("PerfConfigAttr is %d bytes not %d\n", attrlen, buflen);
return -EINVAL;
}
ret = LOS_CopyToKernel(&attr, attrlen, buffer, buflen);
if (ret != 0) {
return -EINVAL;
}
ret = LOS_PerfConfig(&attr);
if (ret != LOS_OK) {
PRINT_ERR("perf config error %u\n", ret);
return -EINVAL;
}
return 0;
}
static int PerfIoctl(struct file *filep, int cmd, unsigned long arg)
{
(void)filep;
switch (cmd) {
case PERF_START:
LOS_PerfStart((UINT32)arg);
break;
case PERF_STOP:
LOS_PerfStop();
break;
default:
PRINT_ERR("Unknown perf ioctl cmd:%d\n", cmd);
return -EINVAL;
}
return 0;
}
static const struct file_operations_vfs g_perfDevOps = {
PerfOpen, /* open */
PerfClose, /* close */
PerfRead, /* read */
PerfConfig, /* write */
NULL, /* seek */
PerfIoctl, /* ioctl */
NULL, /* mmap */
#ifndef CONFIG_DISABLE_POLL
NULL, /* poll */
#endif
NULL, /* unlink */
};
int DevPerfRegister(void)
{
return register_driver(PERF_DRIVER, &g_perfDevOps, PERF_DRIVER_MODE, 0); /* 0666: file mode */
}
LOS_MODULE_INIT(DevPerfRegister, LOS_INIT_LEVEL_KMOD_EXTENDED);