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test/registry: measure time used for iteration

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Issue #3612
This commit is contained in:
Alexander Boettcher 2020-01-27 10:59:38 +01:00 committed by Christian Helmuth
parent 5bbaa30655
commit 2afc218767
1 changed files with 45 additions and 0 deletions
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45
repos/base/src/test/registry/main.cc
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@ -15,6 +15,7 @@
#include <base/registry.h>
#include <base/component.h>
#include <base/log.h>
#include <trace/timestamp.h>
/*
@ -70,9 +71,53 @@ static void test_exception_during_for_each()
throw Failed();
}
static void test_performance_for_each()
{
using namespace Genode;
struct Item : Interface { };
Registry<Registered<Item> > registry { };
Registry<Registered<Item> > const & registry_const = registry;
static Constructible<Registered<Item>> items[20000];
for (unsigned i = 0; i < sizeof(items)/sizeof(items[0]); i++) {
items[i].construct(registry);
}
Trace::Timestamp time_const = 0;
Trace::Timestamp time_non_const = 0;
/* warm up */
registry.for_each([&](Item const &){});
{
Trace::Timestamp start = Trace::timestamp();
registry_const.for_each([&](Item const &){});
Trace::Timestamp end = Trace::timestamp();
time_const = end - start;
}
{
Trace::Timestamp start = Trace::timestamp();
registry.for_each([](Item const &) {});
Trace::Timestamp end = Trace::timestamp();
time_non_const = end - start;
}
Genode::log("time non_const=", time_non_const, " const=", time_const,
" diff=", (long)(time_non_const - time_const), " ",
" per Item: non_const=", time_non_const / (sizeof(items)/sizeof(items[0])),
" const=", time_const / (sizeof(items)/sizeof(items[0])));
}
void Component::construct(Genode::Env &env)
{
test_performance_for_each();
test_exception_during_for_each();
env.parent().exit(0);