Author: jhibbits
Date: Wed Sep 25 01:23:08 2019
New Revision: 352666
URL: https://svnweb.freebsd.org/changeset/base/352666
Log:
powerpc: Allocate DPCPU block from domain-local memory
This should improve NUMA scalability a little, by binding to the CPU's NUMA
domain. This matches what's done on amd64.
Modified:
head/sys/powerpc/powerpc/mp_machdep.c
Modified: head/sys/powerpc/powerpc/mp_machdep.c
==============================================================================
--- head/sys/powerpc/powerpc/mp_machdep.c Wed Sep 25 00:24:57 2019
(r352665)
+++ head/sys/powerpc/powerpc/mp_machdep.c Wed Sep 25 01:23:08 2019
(r352666)
@@ -35,6 +35,7 @@ __FBSDID("$FreeBSD$");
#include <sys/ktr.h>
#include <sys/bus.h>
#include <sys/cpuset.h>
+#include <sys/domainset.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
@@ -149,7 +150,7 @@ cpu_mp_start(void)
{
struct cpuref bsp, cpu;
struct pcpu *pc;
- int error;
+ int domain, error;
error = platform_smp_get_bsp(&bsp);
KASSERT(error == 0, ("Don't know BSP"));
@@ -166,12 +167,18 @@ cpu_mp_start(void)
cpu.cr_cpuid);
goto next;
}
+
+ if (vm_ndomains > 1)
+ domain = cpu.cr_domain;
+ else
+ domain = 0;
+
if (cpu.cr_cpuid != bsp.cr_cpuid) {
void *dpcpu;
pc = &__pcpu[cpu.cr_cpuid];
- dpcpu = (void *)kmem_malloc(DPCPU_SIZE, M_WAITOK |
- M_ZERO);
+ dpcpu = (void
*)kmem_malloc_domainset(DOMAINSET_PREF(domain),
+ DPCPU_SIZE, M_WAITOK | M_ZERO);
pcpu_init(pc, cpu.cr_cpuid, sizeof(*pc));
dpcpu_init(dpcpu, cpu.cr_cpuid);
} else {
@@ -179,12 +186,8 @@ cpu_mp_start(void)
pc->pc_cpuid = bsp.cr_cpuid;
pc->pc_bsp = 1;
}
+ pc->pc_domain = domain;
pc->pc_hwref = cpu.cr_hwref;
-
- if (vm_ndomains > 1)
- pc->pc_domain = cpu.cr_domain;
- else
- pc->pc_domain = 0;
CPU_SET(pc->pc_cpuid, &cpuset_domain[pc->pc_domain]);
KASSERT(pc->pc_domain < MAXMEMDOM, ("bad domain value %d\n",
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