diff options
| author | Andi Kleen <andi@firstfloor.org> | 2009-04-27 17:44:11 +0200 |
|---|---|---|
| committer | Robert Richter <robert.richter@amd.com> | 2009-05-08 11:06:33 +0200 |
| commit | 1dcdb5a9e7c235e6e80f1f4d5b8247b3e5347e48 (patch) | |
| tree | 197b80f4941f535fd3b251755b74b557cb8d9ca8 /Documentation | |
| parent | 54f2c841fa0007e5fee3b7d01a911c774f0a6cda (diff) | |
oprofile: re-add force_arch_perfmon option
This re-adds the force_arch_perfmon option that was in the original
arch perfmon patchkit. Originally this was rejected in favour
of a generalized perfmon=name option, but it turned out implementing
the later in a reliable way is hard (and it would have been easy
to crash the kernel if a user gets it wrong)
But now Atom and Core i7 support being readded a user would
need to update their oprofile userland to beyond 0.9.4 to use oprofile again
on Atom or Core i7.
To avoid this problem readd the force_arch_perfmon option.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 90b3924071b..9b9566bf330 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1650,6 +1650,12 @@ and is between 256 and 4096 characters. It is defined in the file oprofile.timer= [HW] Use timer interrupt instead of performance counters + oprofile.force_arch_perfmon=1 [X86] + Force use of architectural perfmon instead of + the CPU specific event set. + This might be useful if you have older oprofile + userland or if you want common events over Intel CPUs. + osst= [HW,SCSI] SCSI Tape Driver Format: <buffer_size>,<write_threshold> See also Documentation/scsi/st.txt. |