Messages in this thread | | | Date | Wed, 11 Feb 2015 12:39:46 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH 0/4] perf: add support for profiling jitted code |
| |
On Wed, Feb 11, 2015 at 12:42:41AM +0100, Stephane Eranian wrote: > To enable synchronization of the runtime MMAPs with those recorded by > the kernel on behalf of the perf tool, the runtime needs to timestamp > any record in the dump file using the same time source. The current > patch series is relying on Sonny Rao's posix-clock patch series > posted on LKML in 2013. The link to the patches is: > https://lkml.org/lkml/2013/12/6/1044 >
At least for x86 you could use something like this:
lkml.kernel.org/r/aa2dd2e4f1e9f2225758be5ba00f14d6909a8ce1.1423180257.git.shli@fb.com
We can re-create the perf_clock() from the tsc with the mult, shift and offset provided in the perf userpage.
| |