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Removed false-sharing on cacheline holding a cell's yield flag.

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This commit is contained in:
Michael Mueller
2025-09-18 15:53:21 +02:00
parent 04bf2ed28c
commit 12a844ad90
3 changed files with 5 additions and 5 deletions
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6
repos/base-tukija/include/tukija/syscall-generic.h
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@@ -219,7 +219,7 @@ namespace Tukija {
*/
struct Worker {
unsigned long yield_flag{0}; /* This flag will be set if a yield request has been filed */
unsigned long padding[3];
unsigned long padding[7];
};
@@ -329,7 +329,7 @@ namespace Tukija {
static Cip *
cip()
{
return reinterpret_cast<Cip *>(0x7fffbffd7000);
return reinterpret_cast<Cip *>(0x7fffbffd3000);
}
};
@@ -1087,7 +1087,7 @@ namespace Tukija {
public:
enum { DEFAULT_QUANTUM = 1000, DEFAULT_PRIORITY = 64 };
enum { DEFAULT_QUANTUM = 1500, DEFAULT_PRIORITY = 64 };
Qpd(mword_t quantum = DEFAULT_QUANTUM,
mword_t priority = DEFAULT_PRIORITY)

2
repos/base-tukija/src/core/include/cell_component.h
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@@ -91,7 +91,7 @@ class Ealan::Cell_component : public Genode::Rpc_object<Cell>,
* Only a region map needs to be allocated here, because the kernel will already
* allocate a frame for this cell CIP during the syscall.
*/
Core::platform().region_alloc().alloc_aligned(4 * Tukija::PAGE_SIZE_BYTE, Tukija::PAGE_SIZE_LOG2).with_result(
Core::platform().region_alloc().alloc_aligned(8 * Tukija::PAGE_SIZE_BYTE, Tukija::PAGE_SIZE_LOG2).with_result(
[&](void *ptr) { _cip = static_cast<Tukija::Cip*>(ptr); },
[&](Genode::Range_allocator::Alloc_error) { throw Genode::Out_of_ram(); });

2
repos/base-tukija/src/core/platform.cc
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@@ -432,7 +432,7 @@ Core::Platform::Platform()
region_alloc().remove_range((addr_t)_tip, get_page_size() * 128);
/* exclude CIP */
region_alloc().remove_range((addr_t)Tukija::Cip::cip(), get_page_size() * 4);
region_alloc().remove_range((addr_t)Tukija::Cip::cip(), get_page_size() * 8);
/* sanity checks */
addr_t check [] = {