i2p/haiku-beta6
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

kernel: Use CPU topology to distribute IRQs

Browse Source
This commit is contained in:
Pawel Dziepak
2013-11-18 05:37:45 +01:00
parent d897a478d7
commit f14e4567e8
1 changed files with 19 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/system/kernel/int.cpp
+19 -2
View File
@@ -67,7 +67,8 @@ struct io_vector {
#endif #endif
}; };
static uint32 sLastCPU; static int32 sLastCPU;
static struct io_vector sVectors[NUM_IO_VECTORS]; static struct io_vector sVectors[NUM_IO_VECTORS];
static bool sAllocatedIOInterruptVectors[NUM_IO_VECTORS]; static bool sAllocatedIOInterruptVectors[NUM_IO_VECTORS];
static mutex sIOInterruptVectorAllocationLock static mutex sIOInterruptVectorAllocationLock
@@ -387,6 +388,22 @@ restore_interrupts(cpu_status status)
} }
static
uint32 assign_cpu(void)
{
int32 nextID = atomic_add(&sLastCPU, 1);
cpu_topology_node* node = get_cpu_topology();
while (node->level != CPU_TOPOLOGY_SMT) {
int levelSize = node->children_count;
node = node->children[nextID % levelSize];
nextID /= levelSize;
}
return node->id;
}
/*! Install a handler to be called when an interrupt is triggered /*! Install a handler to be called when an interrupt is triggered
for the given interrupt number with \a data as the argument. for the given interrupt number with \a data as the argument.
*/ */
@@ -426,7 +443,7 @@ install_io_interrupt_handler(long vector, interrupt_handler handler, void *data,
if (sVectors[vector].type == INTERRUPT_TYPE_IRQ if (sVectors[vector].type == INTERRUPT_TYPE_IRQ
&& sVectors[vector].handler_list == NULL) { && sVectors[vector].handler_list == NULL) {
int32 cpuID = atomic_add(&sLastCPU, 1) % smp_get_num_cpus(); int32 cpuID = assign_cpu();
arch_int_assign_to_cpu(vector, cpuID); arch_int_assign_to_cpu(vector, cpuID);
ASSERT(sVectors[vector].assigned_cpu.cpu == -1); ASSERT(sVectors[vector].assigned_cpu.cpu == -1);