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ANDROID: cgroup: Add vendor hook to the cgroup

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Add a vendor hook after attaching a task to a cgroup to 
recognize the group_id for performance tuning

Bug: 181917687

Signed-off-by: Frankie Chang <frankie.chang@mediatek.com>
Change-Id: I603afa3d893dd575a7dcb97f83bd9eacb8315bab
(cherry picked from commit bed1e2a75b0000d99a00177272b93e5c8430308b)
This commit is contained in:
Frankie Chang 2021-01-12 14:07:38 +08:00 • committed by Todd Kjos
parent 47c864ead1
commit 4b22a63233
3 changed files with 21 additions and 0 deletions
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2
drivers/android/vendor_hooks.c
View file

@ -20,6 +20,7 @@
#include <trace/hooks/minidump.h>
#include <trace/hooks/wqlockup.h>
#include <trace/hooks/sysrqcrash.h>
#include <trace/hooks/cgroup.h>
/*
* Export tracepoints that act as a bare tracehook (ie: have no trace event
@ -69,3 +70,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_sysrq_crash);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_find_busiest_group);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_map_util_freq);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_em_pd_energy);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_cgroup_set_task);

17
include/trace/hooks/cgroup.h Normal file
View file

@ -0,0 +1,17 @@
/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM cgroup
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH trace/hooks
#if !defined(_TRACE_HOOK_CGROUP_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_HOOK_CGROUP_H
#include <linux/tracepoint.h>
#include <trace/hooks/vendor_hooks.h>
struct task_struct;
DECLARE_HOOK(android_vh_cgroup_set_task,
TP_PROTO(int ret, struct task_struct *task),
TP_ARGS(ret, task));
#endif
#include <trace/define_trace.h>

2
kernel/cgroup/cgroup-v1.c
View file

@ -17,6 +17,7 @@
#include <linux/fs_parser.h>
#include <trace/events/cgroup.h>
#include <trace/hooks/cgroup.h>
#define cg_invalf(fc, fmt, ...) invalf(fc, fmt, ## __VA_ARGS__)
@ -522,6 +523,7 @@ static ssize_t __cgroup1_procs_write(struct kernfs_open_file *of,
goto out_finish;
ret = cgroup_attach_task(cgrp, task, threadgroup);
trace_android_vh_cgroup_set_task(ret, task);
out_finish:
cgroup_procs_write_finish(task);