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authorLinus Torvalds <torvalds@linux-foundation.org>2010-11-12 08:39:52 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-11-12 08:39:52 -0800
commit28397babba4d2bb4a529859dd1f4fb9a0beb3e48 (patch)
treed8ec5cb703d3d8e2c7d0e66f25c361c90aee3ae2 /include
parent99efb9369c54fa98fc354a9ad4bc8c59f3212ff4 (diff)
parent034c6efa4616e5ff6253549e973e7fef12899324 (diff)
Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf, amd: Use kmalloc_node(,__GFP_ZERO) for northbridge structure allocation perf_events: Fix time tracking in samples perf trace: update usage perf trace: update Documentation with new perf trace variants perf trace: live-mode command-line cleanup perf trace record: handle commands correctly perf record: make the record options available outside perf record perf trace scripting: remove system-wide param from shell scripts perf trace scripting: fix some small memory leaks and missing error checks perf: Fix usages of profile_cpu in builtin-top.c to use cpu_list perf, ui: Eliminate stack-smashing protection compiler complaint
Diffstat (limited to 'include')
-rw-r--r--include/linux/perf_event.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 057bf22a8323..40150f345982 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -747,6 +747,16 @@ struct perf_event {
u64 tstamp_running;
u64 tstamp_stopped;
+ /*
+ * timestamp shadows the actual context timing but it can
+ * be safely used in NMI interrupt context. It reflects the
+ * context time as it was when the event was last scheduled in.
+ *
+ * ctx_time already accounts for ctx->timestamp. Therefore to
+ * compute ctx_time for a sample, simply add perf_clock().
+ */
+ u64 shadow_ctx_time;
+
struct perf_event_attr attr;
struct hw_perf_event hw;