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memtest.jl
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memtest.jl
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# This file is a part of Julia. License is MIT: https://julialang.org/license
struct RUsage
ru_utime_sec::Clong # user CPU time used
ru_utime_usec::Clong # user CPU time used
ru_stime_sec::Clong # system CPU time used
ru_stime_usec::Clong # system CPU time used
ru_maxrss::Clong # maximum resident set size
ru_ixrss::Clong # integral shared memory size
ru_idrss::Clong # integral unshared data size
ru_isrss::Clong # integral unshared stack size
ru_minflt::Clong # page reclaims (soft page faults)
ru_majflt::Clong # page faults (hard page faults)
ru_nswap::Clong # swaps
ru_inblock::Clong # block input operations
ru_oublock::Clong # block output operations
ru_msgsnd::Clong # IPC messages sent
ru_msgrcv::Clong # IPC messages received
ru_nsignals::Clong # signals received
ru_nvcsw::Clong # voluntary context switches
ru_nivcsw::Clong # involuntary context switches
end
function get_vmsize()
ru = Vector{RUsage}(undef, 1)
ccall(:getrusage, Cint, (Cint, Ptr{Cvoid}), 0, ru)
return ru[1].ru_maxrss
end
function run_mtest(name, testf)
print("Testing $name...")
for i in 1:2
print("priming process...")
testf()
end
vm1 = get_vmsize()
println("monitored run...")
testf()
vm2 = get_vmsize()
diff = vm2 - vm1
WARN = (diff > 1000) ? "<===================================== WARNING" : ""
println("Memory Test ($name) : VMSize difference : $diff KB $WARN")
end
function mtest_create_strings()
for i in 1:10^8
string("$i")
end
GC.gc()
end
function mtest_remotecall_fetch()
for i in 1:10^5
remotecall_fetch(myid, 1)
end
GC.gc()
end
run_mtest("create_strings", () -> mtest_create_strings())
run_mtest("remotecall_fetch", () -> mtest_remotecall_fetch())