ehmry/genode
ehmry
/
genode
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

test/resource_request: API transition 

Ref #1987
This commit is contained in:
Norman Feske 2017-01-08 02:56:47 +01:00
parent 82e6d7cf52
commit 7646737833
1 changed files with 40 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

82
repos/os/src/test/resource_request/main.cc
View File

@ -3,8 +3,8 @@
* \author Norman Feske
* \date 2013-09-27
*
* This test exercises various situations where a process might need to request
* additional resources from its parent.
* This test exercises various situations where a component might need to
* request additional resources from its parent.
*/
/*
@ -14,50 +14,45 @@
* under the terms of the GNU General Public License version 2.
*/
#include <base/env.h>
#include <base/component.h>
#include <base/log.h>
#include <ram_session/connection.h>
static Genode::size_t used_quota()
static void print_quota_stats(Genode::Ram_session &ram)
{
return Genode::env()->ram_session()->used();
}
static void print_quota_stats()
{
Genode::log("quota: avail=", Genode::env()->ram_session()->avail(), " "
"used=", used_quota());
Genode::log("quota: avail=", ram.avail(), " used=", ram.used());
}
#define ASSERT(cond) \
if (!(cond)) { \
Genode::error("assertion ", #cond, " failed"); \
return -2; }
error("assertion ", #cond, " failed"); \
throw Error(); }
int main(int argc, char **argv)
void Component::construct(Genode::Env &env)
{
using namespace Genode;
class Error : Exception { };
log("--- test-resource_request started ---");
/*
* Consume initial quota to let the test trigger the corner cases of
* exceeded quota.
*/
size_t const avail_quota = env()->ram_session()->avail();
size_t const avail_quota = env.ram().avail();
enum { KEEP_QUOTA = 64*1024 };
size_t const wasted_quota = (avail_quota >= KEEP_QUOTA)
? avail_quota - KEEP_QUOTA : 0;
if (wasted_quota)
env()->ram_session()->alloc(wasted_quota);
env.ram().alloc(wasted_quota);
log("wasted available quota of ", wasted_quota, " bytes");
print_quota_stats();
print_quota_stats(env.ram());
/*
* Out of memory while upgrading session quotas.
@ -73,20 +68,24 @@ int main(int argc, char **argv)
*/
log("\n-- draining signal session --");
{
enum { NUM_SIG_CTX = 2000U };
static Signal_context sig_ctx[NUM_SIG_CTX];
static Signal_receiver sig_rec;
struct Dummy_signal_handler : Signal_handler<Dummy_signal_handler>
{
Dummy_signal_handler(Entrypoint &ep)
: Signal_handler<Dummy_signal_handler>(ep, *this, nullptr) { }
};
enum { NUM_SIGH = 2000U };
static Constructible<Dummy_signal_handler> dummy_handlers[NUM_SIGH];
for (unsigned i = 0; i < NUM_SIG_CTX; i++)
sig_rec.manage(&sig_ctx[i]);
for (unsigned i = 0; i < NUM_SIGH; i++)
dummy_handlers[i].construct(env.ep());
print_quota_stats();
print_quota_stats(env.ram());
for (unsigned i = 0; i < NUM_SIG_CTX; i++)
sig_rec.dissolve(&sig_ctx[i]);
for (unsigned i = 0; i < NUM_SIGH; i++)
dummy_handlers[i].destruct();
}
print_quota_stats();
size_t const used_quota_after_draining_session = used_quota();
print_quota_stats(env.ram());
size_t const used_quota_after_draining_session = env.ram().used();
/*
* When creating a new session, we try to donate RAM quota to the server.
@ -94,32 +93,32 @@ int main(int argc, char **argv)
* resource request to the parent.
*/
log("\n-- out-of-memory during session request --");
static Ram_connection ram;
ram.ref_account(env()->ram_session_cap());
print_quota_stats();
size_t const used_quota_after_session_request = used_quota();
static Ram_connection ram(env);
ram.ref_account(env.ram_session_cap());
print_quota_stats(env.ram());
size_t const used_quota_after_session_request = env.ram().used();
/*
* Quota transfers from the process' RAM session may result in resource
* Quota transfers from the component's RAM session may result in resource
* requests, too.
*/
log("\n-- out-of-memory during transfer-quota --");
int ret = env()->ram_session()->transfer_quota(ram.cap(), 512*1024);
int ret = env.ram().transfer_quota(ram.cap(), 512*1024);
if (ret != 0) {
error("transfer quota failed (ret = ", ret, ")");
return -1;
throw Error();
}
print_quota_stats();
size_t const used_quota_after_transfer = used_quota();
print_quota_stats(env.ram());
size_t const used_quota_after_transfer = env.ram().used();
/*
* Finally, resource requests could be caused by a regular allocation,
* which is the most likely case in normal scenarios.
*/
log("\n-- out-of-memory during RAM allocation --");
env()->ram_session()->alloc(512*1024);
print_quota_stats();
size_t used_quota_after_alloc = used_quota();
env.ram().alloc(512*1024);
print_quota_stats(env.ram());
size_t const used_quota_after_alloc = env.ram().used();
/*
* Validate asserted effect of the individual steps on the used quota.
@ -129,6 +128,5 @@ int main(int argc, char **argv)
ASSERT(used_quota_after_alloc > used_quota_after_transfer);
log("--- finished test-resource_request ---");
return 0;
env.parent().exit(0);
}