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提交 561179c4 创建 作者: Silas Boyd-Wickizer's avatar Silas Boyd-Wickizer
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An IPI to configure event counters.

上级 5606f832
隐藏空白字符变更
内嵌 并排
正在显示 包含 27 行增加 和 3 行删除
kernel.h
浏览文件 @ 561179c4
...@@ -130,6 +130,7 @@ int cpunum(void); ...@@ -130,6 +130,7 @@ int cpunum(void);
void lapicstartap(u8, u32 addr); void lapicstartap(u8, u32 addr);
void lapiceoi(void); void lapiceoi(void);
void lapic_tlbflush(u32); void lapic_tlbflush(u32);
void lapic_sampconf(u32);
void lapicpc(char mask); void lapicpc(char mask);
// mp.c // mp.c
...@@ -227,6 +228,7 @@ void rcu_gc_worker(void); ...@@ -227,6 +228,7 @@ void rcu_gc_worker(void);
void sampstart(void); void sampstart(void);
int sampintr(struct trapframe*); int sampintr(struct trapframe*);
void sampdump(void); void sampdump(void);
void sampconf(void);
// spinlock.c // spinlock.c
void acquire(struct spinlock*); void acquire(struct spinlock*);
......
lapic.c
浏览文件 @ 561179c4
...@@ -183,6 +183,12 @@ lapic_tlbflush(u32 cpu) ...@@ -183,6 +183,12 @@ lapic_tlbflush(u32 cpu)
lapic_ipi(cpu, T_TLBFLUSH); lapic_ipi(cpu, T_TLBFLUSH);
} }
void
lapic_sampconf(u32 cpu)
{
lapic_ipi(cpu, T_SAMPCONF);
}
// Start additional processor running bootstrap code at addr. // Start additional processor running bootstrap code at addr.
// See Appendix B of MultiProcessor Specification. // See Appendix B of MultiProcessor Specification.
void void
......
sampler.c
浏览文件 @ 561179c4
...@@ -8,6 +8,7 @@ ...@@ -8,6 +8,7 @@
#include "kernel.h" #include "kernel.h"
#include "bits.h" #include "bits.h"
#include "amd64.h" #include "amd64.h"
#include "cpu.h"
static const u64 debug_sel = static const u64 debug_sel =
0UL << 32 | 0UL << 32 |
...@@ -87,13 +88,25 @@ sampdump(void) ...@@ -87,13 +88,25 @@ sampdump(void)
} }
void void
sampstart(void) sampconf(void)
{ {
pushcli(); pushcli();
pmu.config(0, debug_sel, -debug_cnt); pmu.config(0, debug_sel, -debug_cnt);
popcli(); popcli();
} }
void
sampstart(void)
{
for(struct cpu *c = cpus; c < cpus+ncpu; c++) {
if(c == cpus+cpunum())
continue;
lapic_sampconf(c->id);
}
sampconf();
}
static int static int
samplog(struct trapframe *tf) samplog(struct trapframe *tf)
{ {
......
trap.c
浏览文件 @ 561179c4
...@@ -113,8 +113,10 @@ trap(struct trapframe *tf) ...@@ -113,8 +113,10 @@ trap(struct trapframe *tf)
lapiceoi(); lapiceoi();
lcr3(rcr3()); lcr3(rcr3());
break; break;
case T_SAMPCONF:
//PAGEBREAK: 13 lapiceoi();
sampconf();
break;
default: default:
if(myproc() == 0 || (tf->cs&3) == 0){ if(myproc() == 0 || (tf->cs&3) == 0){
// In kernel, it must be our mistake. // In kernel, it must be our mistake.
......
traps.h
浏览文件 @ 561179c4
...@@ -26,6 +26,7 @@ ...@@ -26,6 +26,7 @@
// processor defined exceptions or interrupt vectors. // processor defined exceptions or interrupt vectors.
#define T_SYSCALL 64 // system call #define T_SYSCALL 64 // system call
#define T_TLBFLUSH 65 // flush TLB #define T_TLBFLUSH 65 // flush TLB
#define T_SAMPCONF 66 // configure event counters
#define T_DEFAULT 500 // catchall #define T_DEFAULT 500 // catchall
#define T_IRQ0 32 // IRQ 0 corresponds to int T_IRQ #define T_IRQ0 32 // IRQ 0 corresponds to int T_IRQ
......
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