forked from rrcarlosr/Jetpack
125 lines
2.8 KiB
C
125 lines
2.8 KiB
C
/*
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* drivers/misc/tegra-profiler/ma.c
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*
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* Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/mm.h>
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#include <linux/timer.h>
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#include <linux/sched.h>
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#include <linux/tegra_profiler.h>
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#include "ma.h"
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#include "quadd.h"
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#include "hrt.h"
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#include "comm.h"
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#include "debug.h"
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static void make_sample(struct quadd_hrt_ctx *hrt_ctx,
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pid_t pid, unsigned long vm_size,
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unsigned long rss_size)
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{
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struct quadd_record_data record;
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struct quadd_ma_data *ma = &record.ma;
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record.record_type = QUADD_RECORD_TYPE_MA;
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ma->pid = pid;
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ma->time = quadd_get_time();
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ma->vm_size = vm_size << (PAGE_SHIFT-10);
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ma->rss_size = rss_size << (PAGE_SHIFT-10);
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quadd_put_sample(&record, NULL, 0);
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}
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static void check_ma(struct quadd_hrt_ctx *hrt_ctx)
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{
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pid_t pid;
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struct pid *pid_s;
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struct task_struct *task = NULL;
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struct mm_struct *mm;
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struct quadd_ctx *quadd_ctx = hrt_ctx->quadd_ctx;
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unsigned long vm_size, rss_size;
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pid = quadd_ctx->param.pids[0];
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rcu_read_lock();
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pid_s = find_vpid(pid);
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if (pid_s)
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task = pid_task(pid_s, PIDTYPE_PID);
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rcu_read_unlock();
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if (!task)
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return;
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mm = task->mm;
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if (!mm)
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return;
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vm_size = mm->total_vm;
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rss_size = get_mm_rss(mm);
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if (vm_size != hrt_ctx->vm_size_prev ||
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rss_size != hrt_ctx->rss_size_prev) {
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make_sample(hrt_ctx, pid, vm_size, rss_size);
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hrt_ctx->vm_size_prev = vm_size;
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hrt_ctx->rss_size_prev = rss_size;
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}
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}
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static void timer_interrupt(unsigned long data)
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{
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struct quadd_hrt_ctx *hrt_ctx = (struct quadd_hrt_ctx *)data;
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struct timer_list *timer = &hrt_ctx->ma_timer;
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if (!atomic_read(&hrt_ctx->active))
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return;
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check_ma(hrt_ctx);
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timer->expires = jiffies + msecs_to_jiffies(hrt_ctx->ma_period);
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add_timer(timer);
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}
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void quadd_ma_start(struct quadd_hrt_ctx *hrt_ctx)
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{
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struct timer_list *timer = &hrt_ctx->ma_timer;
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if (hrt_ctx->ma_period == 0) {
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pr_info("QuadD MA is disabled\n");
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return;
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}
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pr_info("QuadD MA is started, interval: %u msec\n",
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hrt_ctx->ma_period);
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hrt_ctx->vm_size_prev = 0;
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hrt_ctx->rss_size_prev = 0;
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init_timer(timer);
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timer->function = timer_interrupt;
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timer->expires = jiffies + msecs_to_jiffies(hrt_ctx->ma_period);
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timer->data = (unsigned long)hrt_ctx;
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add_timer(timer);
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}
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void quadd_ma_stop(struct quadd_hrt_ctx *hrt_ctx)
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{
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if (hrt_ctx->ma_period > 0) {
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pr_info("QuadD MA is stopped\n");
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del_timer_sync(&hrt_ctx->ma_timer);
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}
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}
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