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sysinfo.jl
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sysinfo.jl
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# This file is a part of Julia. License is MIT: https://julialang.org/license
module Sys
@doc """
Provide methods for retrieving information about hardware and the operating system.
""" Sys
export BINDIR,
CPU_CORES,
CPU_NAME,
WORD_SIZE,
ARCH,
MACHINE,
KERNEL,
JIT,
cpu_info,
cpu_summary,
uptime,
loadavg,
free_memory,
total_memory,
isapple,
isbsd,
islinux,
isunix,
iswindows
import ..Base: show
"""
Sys.BINDIR
A string containing the full path to the directory containing the `julia` executable.
"""
BINDIR = ccall(:jl_get_julia_bindir, Any, ())
_early_init() = global BINDIR = ccall(:jl_get_julia_bindir, Any, ())
# helper to avoid triggering precompile warnings
global CPU_CORES
"""
Sys.CPU_CORES
The number of logical CPU cores available in the system.
See the Hwloc.jl package for extended information, including number of physical cores.
"""
:CPU_CORES
"""
Sys.ARCH
A symbol representing the architecture of the build configuration.
"""
const ARCH = ccall(:jl_get_ARCH, Any, ())
"""
Sys.KERNEL
A symbol representing the name of the operating system, as returned by `uname` of the build configuration.
"""
const KERNEL = ccall(:jl_get_UNAME, Any, ())
"""
Sys.MACHINE
A string containing the build triple.
"""
const MACHINE = Base.MACHINE
"""
Sys.WORD_SIZE
Standard word size on the current machine, in bits.
"""
const WORD_SIZE = Core.sizeof(Int) * 8
function __init__()
global CPU_CORES =
haskey(ENV,"JULIA_CPU_CORES") ? parse(Int,ENV["JULIA_CPU_CORES"]) :
Int(ccall(:jl_cpu_cores, Int32, ()))
global SC_CLK_TCK = ccall(:jl_SC_CLK_TCK, Clong, ())
global CPU_NAME = ccall(:jl_get_cpu_name, Ref{String}, ())
global JIT = ccall(:jl_get_JIT, Ref{String}, ())
end
mutable struct UV_cpu_info_t
model::Ptr{UInt8}
speed::Int32
cpu_times!user::UInt64
cpu_times!nice::UInt64
cpu_times!sys::UInt64
cpu_times!idle::UInt64
cpu_times!irq::UInt64
end
mutable struct CPUinfo
model::String
speed::Int32
cpu_times!user::UInt64
cpu_times!nice::UInt64
cpu_times!sys::UInt64
cpu_times!idle::UInt64
cpu_times!irq::UInt64
CPUinfo(model,speed,u,n,s,id,ir)=new(model,speed,u,n,s,id,ir)
end
CPUinfo(info::UV_cpu_info_t) = CPUinfo(unsafe_string(info.model), info.speed,
info.cpu_times!user, info.cpu_times!nice, info.cpu_times!sys,
info.cpu_times!idle, info.cpu_times!irq)
function _show_cpuinfo(io::IO, info::Sys.CPUinfo, header::Bool=true, prefix::AbstractString=" ")
tck = SC_CLK_TCK
if header
println(io, info.model, ": ")
print(io, " "^length(prefix))
println(io, " ", lpad("speed", 5), " ", lpad("user", 9), " ", lpad("nice", 9), " ",
lpad("sys", 9), " ", lpad("idle", 9), " ", lpad("irq", 9))
end
print(io, prefix)
unit = tck > 0 ? " s " : " "
tc = max(tck, 1)
d(i, unit=unit) = lpad(string(round(Int,i)), 9) * unit
print(io,
lpad(string(info.speed), 5), " MHz ",
d(info.cpu_times!user / tc), d(info.cpu_times!nice / tc), d(info.cpu_times!sys / tc),
d(info.cpu_times!idle / tc), d(info.cpu_times!irq / tc, tck > 0 ? " s" : " "))
if tck <= 0
print(io, "ticks")
end
end
show(io::IO, info::CPUinfo) = _show_cpuinfo(io, info, true, " ")
function _cpu_summary(io::IO, cpu::AbstractVector{CPUinfo}, i, j)
if j-i < 9
header = true
for x = i:j
header || println(io)
_show_cpuinfo(io, cpu[x], header, "#$(x-i+1) ")
header = false
end
else
summary = CPUinfo(cpu[i].model,0,0,0,0,0,0)
count = j - i + 1
for x = i:j
summary.speed += cpu[i].speed
summary.cpu_times!user += cpu[x].cpu_times!user
summary.cpu_times!nice += cpu[x].cpu_times!nice
summary.cpu_times!sys += cpu[x].cpu_times!sys
summary.cpu_times!idle += cpu[x].cpu_times!idle
summary.cpu_times!irq += cpu[x].cpu_times!irq
end
summary.speed = div(summary.speed,count)
_show_cpuinfo(io, summary, true, "#1-$(count) ")
end
println(io)
end
function cpu_summary(io::IO=STDOUT, cpu::AbstractVector{CPUinfo} = cpu_info())
model = cpu[1].model
first = 1
for i = 2:length(cpu)
if model != cpu[i].model
_cpu_summary(io, cpu, first, i-1)
first = i
end
end
_cpu_summary(io, cpu, first, length(cpu))
end
function cpu_info()
UVcpus = Ref{Ptr{UV_cpu_info_t}}()
count = Ref{Int32}()
Base.uv_error("uv_cpu_info",ccall(:uv_cpu_info, Int32, (Ptr{Ptr{UV_cpu_info_t}}, Ptr{Int32}), UVcpus, count))
cpus = Vector{CPUinfo}(uninitialized, count[])
for i = 1:length(cpus)
cpus[i] = CPUinfo(unsafe_load(UVcpus[], i))
end
ccall(:uv_free_cpu_info, Cvoid, (Ptr{UV_cpu_info_t}, Int32), UVcpus[], count[])
return cpus
end
"""
Sys.uptime()
Gets the current system uptime in seconds.
"""
function uptime()
uptime_ = Ref{Float64}()
Base.uv_error("uv_uptime",ccall(:uv_uptime, Int32, (Ptr{Float64},), uptime_))
return uptime_[]
end
"""
Sys.loadavg()
Get the load average. See: https://en.wikipedia.org/wiki/Load_(computing).
"""
function loadavg()
loadavg_ = Vector{Float64}(uninitialized, 3)
ccall(:uv_loadavg, Cvoid, (Ptr{Float64},), loadavg_)
return loadavg_
end
free_memory() = ccall(:uv_get_free_memory, UInt64, ())
total_memory() = ccall(:uv_get_total_memory, UInt64, ())
"""
Sys.get_process_title()
Get the process title. On some systems, will always return an empty string.
"""
function get_process_title()
buf = Vector{UInt8}(uninitialized, 512)
err = ccall(:uv_get_process_title, Cint, (Ptr{UInt8}, Cint), buf, 512)
Base.uv_error("get_process_title", err)
return unsafe_string(pointer(buf))
end
"""
Sys.set_process_title(title::AbstractString)
Set the process title. No-op on some operating systems.
"""
function set_process_title(title::AbstractString)
err = ccall(:uv_set_process_title, Cint, (Cstring,), title)
Base.uv_error("set_process_title", err)
end
"""
Sys.maxrss()
Get the maximum resident set size utilized in bytes.
See also:
- man page of getrusage(2) on Linux and FreeBSD.
- windows api `GetProcessMemoryInfo`
"""
maxrss() = ccall(:jl_maxrss, Csize_t, ())
"""
Sys.isunix([os])
Predicate for testing if the OS provides a Unix-like interface.
See documentation in [Handling Operating System Variation](@ref).
"""
function isunix(os::Symbol)
if iswindows(os)
return false
elseif islinux(os) || isbsd(os)
return true
else
throw(ArgumentError("unknown operating system \"$os\""))
end
end
"""
Sys.islinux([os])
Predicate for testing if the OS is a derivative of Linux.
See documentation in [Handling Operating System Variation](@ref).
"""
islinux(os::Symbol) = (os == :Linux)
"""
Sys.isbsd([os])
Predicate for testing if the OS is a derivative of BSD.
See documentation in [Handling Operating System Variation](@ref).
!!! note
The Darwin kernel descends from BSD, which means that `Sys.isbsd()` is
`true` on macOS systems. To exclude macOS from a predicate, use
`Sys.isbsd() && !Sys.isapple()`.
"""
isbsd(os::Symbol) = (os == :FreeBSD || os == :OpenBSD || os == :NetBSD || os == :DragonFly || os == :Darwin || os == :Apple)
"""
Sys.iswindows([os])
Predicate for testing if the OS is a derivative of Microsoft Windows NT.
See documentation in [Handling Operating System Variation](@ref).
"""
iswindows(os::Symbol) = (os == :Windows || os == :NT)
"""
Sys.isapple([os])
Predicate for testing if the OS is a derivative of Apple Macintosh OS X or Darwin.
See documentation in [Handling Operating System Variation](@ref).
"""
isapple(os::Symbol) = (os == :Apple || os == :Darwin)
for f in (:isunix, :islinux, :isbsd, :isapple, :iswindows)
@eval $f() = $(getfield(@__MODULE__, f)(KERNEL))
end
if iswindows()
function windows_version()
verinfo = ccall(:GetVersion, UInt32, ())
VersionNumber(verinfo & 0xFF, (verinfo >> 8) & 0xFF, verinfo >> 16)
end
else
windows_version() = v"0.0"
end
"""
Sys.windows_version()
Returns the version number for the Windows NT Kernel as a `VersionNumber`,
i.e. `v"major.minor.build"`, or `v"0.0.0"` if this is not running on Windows.
"""
windows_version
const WINDOWS_VISTA_VER = v"6.0"
end # module Sys