diff options
| author | Dave Hansen <[email protected]> | 2013-06-21 08:51:38 -0700 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2013-06-23 11:52:58 +0200 |
| commit | 0c4df02d739fed5ab081b330d67403206dd3967e (patch) | |
| tree | 37296c48ff5adef1537fd5c64977a3c1a0e8cff2 /lib/mpi/mpi-pow.c | |
| parent | 14c63f17b1fde5a575a28e96547a22b451c71fb5 (diff) | |
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 <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Dave Hansen <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'lib/mpi/mpi-pow.c')
0 files changed, 0 insertions, 0 deletions