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Attach affinity information to session requests

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This patch extends the 'Parent::session()' and 'Root::session()'
functions with an additional 'affinity' parameter, which is inteded to
express the preferred affinity of the new session. For CPU sessions
provided by core, the values will be used to select the set of CPUs
assigned to the CPU session. For other services, the session affinity
information can be utilized to optimize the locality of the server
thread with the client. For example, to enable the IRQ session to route
an IRQ to the CPU core on which the corresponding device driver (the IRQ
client) is running.
This commit is contained in:
Norman Feske
2013-08-07 23:10:28 +02:00
parent f1af8e371d
commit 6d837c9e26
35 changed files with 137 additions and 78 deletions
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14
gems/src/server/d3m/block_service.h
View File

@@ -51,7 +51,9 @@ class Iso9660_boot_probe
Proxy_service(Genode::Session_capability session)
: Genode::Service("proxy"), _session(session) { }
Genode::Session_capability session(const char *) { return _session; }
Genode::Session_capability session(char const *,
Genode::Affinity const &)
{ return _session; }
void upgrade(Genode::Session_capability session, const char *) { }
@@ -127,7 +129,8 @@ class Iso9660_boot_probe
{
char const *args = "ram_quota=140K, tx_buf_size=128K";
Genode::Root_client root(_block_root);
return Genode::static_cap_cast<Block::Session>(root.session(args));
return Genode::static_cap_cast<Block::Session>
(root.session(args, Genode::Affinity()));
}
/**
@@ -152,7 +155,7 @@ class Iso9660_boot_probe
char args[Genode::Root::Session_args::MAX_SIZE];
Genode::snprintf(args, sizeof(args), "ram_quota=4K, filename=\"%s\"",
boot_tag_name);
rom_root.session(args);
rom_root.session(args, Genode::Affinity());
}
public:
@@ -297,11 +300,12 @@ namespace Block {
Root(Driver_registry &driver_registry)
: _driver_registry(driver_registry) { }
Genode::Session_capability session(Genode::Root::Session_args const &args)
Genode::Session_capability session(Genode::Root::Session_args const &args,
Genode::Affinity const &affinity)
{
PDBG("\nsession requested args=\"%s\"", args.string());
Genode::Root_capability root = _driver_registry.root();
return Genode::Root_client(root).session(args);
return Genode::Root_client(root).session(args, affinity);
}
void upgrade(Genode::Session_capability,

3
gems/src/server/d3m/input_service.h
View File

@@ -55,7 +55,8 @@ namespace Input {
try {
using namespace Genode;
return static_cap_cast<Session>(Root_client(root).session(args));
return static_cap_cast<Session>
(Root_client(root).session(args, Genode::Affinity()));
} catch (...) {
throw Source_unavailable();
}

6
gems/src/server/d3m/nic_service.h
View File

@@ -40,7 +40,8 @@ namespace Nic {
public:
Genode::Session_capability session(Session_args const &args)
Genode::Session_capability session(Session_args const &args,
Genode::Affinity const &affinity)
{
if (!args.is_valid_string()) throw Invalid_args();
@@ -48,7 +49,8 @@ namespace Nic {
throw Unavailable();
try {
return Genode::Root_client(_nic_provider.root()).session(args.string());
return Genode::Root_client(_nic_provider.root())
.session(args.string(), affinity);
} catch (...) {
throw Unavailable();
}