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authorMarkus Metzger <markus.t.metzger@intel.com>2009-04-03 16:43:38 +0200
committerIngo Molnar <mingo@elte.hu>2009-04-07 13:36:17 +0200
commit15879d042164650b93d83281ad5f87ad323bfbfe (patch)
tree13a756b1084df356982be428f79f7a9aadfcd3d9
parent38f801129ad07b9afa7f9bd3779f61b805416d8c (diff)
downloadblackbird-op-linux-15879d042164650b93d83281ad5f87ad323bfbfe.tar.gz
blackbird-op-linux-15879d042164650b93d83281ad5f87ad323bfbfe.zip
x86, bts: use trace_clock_global() for timestamps
Rename the bts_struct timestamp field to event. Use trace_clock_global() for time measurement. Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Markus Metzger <markus.t.metzger@intel.com> Cc: roland@redhat.com Cc: eranian@googlemail.com Cc: oleg@redhat.com Cc: juan.villacis@intel.com Cc: ak@linux.jf.intel.com LKML-Reference: <20090403144553.773216000@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--arch/x86/include/asm/ds.h4
-rw-r--r--arch/x86/kernel/ds.c17
2 files changed, 11 insertions, 10 deletions
diff --git a/arch/x86/include/asm/ds.h b/arch/x86/include/asm/ds.h
index a8f672ba100c..772f141afb9a 100644
--- a/arch/x86/include/asm/ds.h
+++ b/arch/x86/include/asm/ds.h
@@ -170,9 +170,9 @@ struct bts_struct {
} lbr;
/* BTS_TASK_ARRIVES or BTS_TASK_DEPARTS */
struct {
- __u64 jiffies;
+ __u64 clock;
pid_t pid;
- } timestamp;
+ } event;
} variant;
};
diff --git a/arch/x86/kernel/ds.c b/arch/x86/kernel/ds.c
index f03f117eff8c..2071b992c35c 100644
--- a/arch/x86/kernel/ds.c
+++ b/arch/x86/kernel/ds.c
@@ -25,6 +25,7 @@
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/mm.h>
+#include <linux/trace_clock.h>
#include <asm/ds.h>
@@ -471,7 +472,7 @@ enum bts_field {
bts_flags,
bts_qual = bts_from,
- bts_jiffies = bts_to,
+ bts_clock = bts_to,
bts_pid = bts_flags,
bts_qual_mask = (bts_qual_max - 1),
@@ -517,8 +518,8 @@ bts_read(struct bts_tracer *tracer, const void *at, struct bts_struct *out)
memset(out, 0, sizeof(*out));
if ((bts_get(at, bts_qual) & ~bts_qual_mask) == bts_escape) {
out->qualifier = (bts_get(at, bts_qual) & bts_qual_mask);
- out->variant.timestamp.jiffies = bts_get(at, bts_jiffies);
- out->variant.timestamp.pid = bts_get(at, bts_pid);
+ out->variant.event.clock = bts_get(at, bts_clock);
+ out->variant.event.pid = bts_get(at, bts_pid);
} else {
out->qualifier = bts_branch;
out->variant.lbr.from = bts_get(at, bts_from);
@@ -555,8 +556,8 @@ static int bts_write(struct bts_tracer *tracer, const struct bts_struct *in)
case bts_task_arrives:
case bts_task_departs:
bts_set(raw, bts_qual, (bts_escape | in->qualifier));
- bts_set(raw, bts_jiffies, in->variant.timestamp.jiffies);
- bts_set(raw, bts_pid, in->variant.timestamp.pid);
+ bts_set(raw, bts_clock, in->variant.event.clock);
+ bts_set(raw, bts_pid, in->variant.event.pid);
break;
default:
return -EINVAL;
@@ -1083,9 +1084,9 @@ static inline void ds_take_timestamp(struct ds_context *context,
return;
memset(&ts, 0, sizeof(ts));
- ts.qualifier = qualifier;
- ts.variant.timestamp.jiffies = jiffies_64;
- ts.variant.timestamp.pid = task->pid;
+ ts.qualifier = qualifier;
+ ts.variant.event.clock = trace_clock_global();
+ ts.variant.event.pid = task->pid;
bts_write(tracer, &ts);
}
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