anonymous_namespace{my_system_api_cgroup.cc} Namespace Reference

Functions
template<typename... Args>
bool	read_line_from_file (const std::string_view &path, Args &...args)
	Utility: Read the first line from the file specified in path and copy its contents into the arguments passed. More...
std::optional< uint32_t >	cgroup_v1_cpu ()
	Read CPU limits as if it were set by cgroup v1. More...
std::optional< uint64_t >	cgroup_v1_memory ()
	Read memory limits as if it were set by cgroup v1. More...
std::optional< uint32_t >	cgroup_v2_cpu ()
	Read CPU limits as if it were set by cgroup v2. More...
std::optional< uint64_t >	cgroup_v2_memory ()
	Read Memory limits as if it were set by cgroup v2. More...

Variables
constexpr std::string_view	quota_path {"/sys/fs/cgroup/cpu/cpu.cfs_quota_us"}
	cgroup v1 path to file containing CPU quota More...
constexpr std::string_view	period_path {"/sys/fs/cgroup/cpu/cpu.cfs_period_us"}
	cgroup v1 path to file containing CPU period More...
constexpr std::string_view	mem_path_v1
	cgroup v1 path to file containing Memory limits More...
constexpr std::string_view	cpu_path_v2 {"/sys/fs/cgroup/cpu.max"}
	cgroup v2 path to file containing CPU limts More...
constexpr std::string_view	mem_path_v2 {"/sys/fs/cgroup/memory.max"}
	cgroup v2 path to file containing Memory limits More...

Function Documentation

cgroup_v1_cpu()

std::optional< uint32_t > anonymous_namespace{my_system_api_cgroup.cc}::cgroup_v1_cpu

(

)

Read CPU limits as if it were set by cgroup v1.

Returns

CPU limits set by cgroup v1 or std::nullopt on failure

Note

Return value of 0.0 implies no limits are set

cgroup_v1_memory()

std::optional< uint64_t > anonymous_namespace{my_system_api_cgroup.cc}::cgroup_v1_memory

(

)

Read memory limits as if it were set by cgroup v1.

Returns

Memory limits set by cgroup v1 or std::nullopt on failure

Note

Return value of 0.0 implies no limits are set

cgroup_v2_cpu()

std::optional< uint32_t > anonymous_namespace{my_system_api_cgroup.cc}::cgroup_v2_cpu

(

)

Read CPU limits as if it were set by cgroup v2.

Returns

CPU limits set by cgroup v2 or std::nullopt on failure

Note

Return value of 0.0 implies no limits are set

cgroup_v2_memory()

std::optional< uint64_t > anonymous_namespace{my_system_api_cgroup.cc}::cgroup_v2_memory

(

)

Read Memory limits as if it were set by cgroup v2.

Returns

Memory limits set by cgroup v2 or std::nullopt on failure

Note

Return value of 0.0 implies no limits are set

read_line_from_file()

template<typename... Args>

bool anonymous_namespace{my_system_api_cgroup.cc}::read_line_from_file	(	const std::string_view &	path,
		Args &...	args
	)

Utility: Read the first line from the file specified in path and copy its contents into the arguments passed.

Parameters

[in]	path	Path to file
[out]	args	Pass the arguments that you expect to read from the file in the order of their appearance in the file

Returns

true if able to read and parse the file, false otherwise

Variable Documentation

cpu_path_v2

constexpr std::string_view anonymous_namespace{my_system_api_cgroup.cc}::cpu_path_v2 {"/sys/fs/cgroup/cpu.max"}

constexpr

cgroup v2 path to file containing CPU limts

mem_path_v1

constexpr std::string_view anonymous_namespace{my_system_api_cgroup.cc}::mem_path_v1

constexpr

Initial value:

{
    "/sys/fs/cgroup/memory/memory.limit_in_bytes"}

cgroup v1 path to file containing Memory limits

mem_path_v2

constexpr std::string_view anonymous_namespace{my_system_api_cgroup.cc}::mem_path_v2 {"/sys/fs/cgroup/memory.max"}

constexpr

cgroup v2 path to file containing Memory limits

period_path

constexpr std::string_view anonymous_namespace{my_system_api_cgroup.cc}::period_path {"/sys/fs/cgroup/cpu/cpu.cfs_period_us"}

constexpr

cgroup v1 path to file containing CPU period

quota_path

constexpr std::string_view anonymous_namespace{my_system_api_cgroup.cc}::quota_path {"/sys/fs/cgroup/cpu/cpu.cfs_quota_us"}

constexpr

cgroup v1 path to file containing CPU quota