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| author | Dave Hansen <dave.hansen@linux.intel.com> | 2013-06-21 19:51:38 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-06-23 13:52:58 +0400 |
| commit | 0c4df02d739fed5ab081b330d67403206dd3967e (patch) | |
| tree | 37296c48ff5adef1537fd5c64977a3c1a0e8cff2 /Documentation/btmrvl.txt | |
| parent | 14c63f17b1fde5a575a28e96547a22b451c71fb5 (diff) | |
| download | linux-0c4df02d739fed5ab081b330d67403206dd3967e.tar.xz | |
x86: Add NMI duration tracepoints
This patch has been invaluable in my adventures finding
issues in the perf NMI handler. I'm as big a fan of
printk() as anybody is, but using printk() in NMIs is
deadly when they're happening frequently.
Even hacking in trace_printk() ended up eating enough
CPU to throw off some of the measurements I was making.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: paulus@samba.org
Cc: acme@ghostprotocols.net
Cc: Dave Hansen <dave@sr71.net>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/btmrvl.txt')
0 files changed, 0 insertions, 0 deletions