[PATCH 09/15] xen/trace: add tlb flush tracepoints

Jeremy Fitzhardinge
2011-06-20T22:16:49Z

arch/x86/xen/mmu.c | 8 +++++++
include/trace/events/xen.h | 48 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 56 insertions(+), 0 deletions(-)

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 8aaa398..ad8a226 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1221,6 +1221,8 @@ static void xen_flush_tlb(void)
struct mmuext_op *op;
struct multicall_space mcs;

+ trace_xen_mmu_flush_tlb(0);
+
preempt_disable();

mcs = xen_mc_entry(sizeof(*op));
@@ -1239,6 +1241,8 @@ static void xen_flush_tlb_single(unsigned long addr)
struct mmuext_op *op;
struct multicall_space mcs;

+ trace_xen_mmu_flush_tlb_single(addr);
+
preempt_disable();

mcs = xen_mc_entry(sizeof(*op));
@@ -1261,6 +1265,8 @@ static void xen_flush_tlb_others(const struct cpumask *cpus,
} *args;
struct multicall_space mcs;

+ trace_xen_mmu_flush_tlb_others(cpus, mm, va);
+
if (cpumask_empty(cpus))
return; /* nothing to do */

@@ -1300,6 +1306,8 @@ static void __xen_write_cr3(bool kernel, unsigned long cr3)
struct multicall_space mcs;
unsigned long mfn;

+ trace_xen_mmu_write_cr3(kernel, cr3);
+
if (cr3)
mfn = pfn_to_mfn(PFN_DOWN(cr3));
else
diff --git a/include/trace/events/xen.h b/include/trace/events/xen.h
index b1f73c4..7d88f7d 100644
--- a/include/trace/events/xen.h
+++ b/include/trace/events/xen.h
@@ -405,6 +405,54 @@ TRACE_EVENT(xen_mmu_pgd_unpin,
TP_printk("mm %p pgd %p", __entry->mm, __entry->pgd)
);

+TRACE_EVENT(xen_mmu_flush_tlb,
+ TP_PROTO(int x),
+ TP_ARGS(x),
+ TP_STRUCT__entry(__array(char, x, 0)),
+ TP_fast_assign((void)x),
+ TP_printk("%s", "")
+ );
+
+TRACE_EVENT(xen_mmu_flush_tlb_single,
+ TP_PROTO(unsigned long addr),
+ TP_ARGS(addr),
+ TP_STRUCT__entry(
+ __field(unsigned long, addr)
+ ),
+ TP_fast_assign(__entry->addr = addr),
+ TP_printk("addr %lx", __entry->addr)
+ );
+
+TRACE_EVENT(xen_mmu_flush_tlb_others,
+ TP_PROTO(const struct cpumask *cpus, struct mm_struct *mm,
+ unsigned long addr),
+ TP_ARGS(cpus, mm, addr),
+ TP_STRUCT__entry(
+ __field(unsigned, ncpus)
+ __field(struct mm_struct *, mm)
+ __field(unsigned long, addr)
+ ),
+ TP_fast_assign(__entry->ncpus = cpumask_weight(cpus);
+ __entry->mm = mm;
+ __entry->addr = addr),
+ TP_printk("ncpus %d mm %p addr %lx",
+ __entry->ncpus, __entry->mm, __entry->addr)
+ );
+
+TRACE_EVENT(xen_mmu_write_cr3,
+ TP_PROTO(bool kernel, unsigned long cr3),
+ TP_ARGS(kernel, cr3),
+ TP_STRUCT__entry(
+ __field(bool, kernel)
+ __field(unsigned long, cr3)
+ ),
+ TP_fast_assign(__entry->kernel = kernel;
+ __entry->cr3 = cr3),
+ TP_printk("%s cr3 %lx",
+ __entry->kernel ? "kernel" : "user", __entry->cr3)
+ );
+
+
/* CPU */
TRACE_EVENT(xen_cpu_write_ldt_entry,
TP_PROTO(struct desc_struct *dt, int entrynum, u64 desc),
--
1.7.5.4