Messages in this thread | | | Date | Tue, 25 Jun 2013 21:16:54 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH v2 00/14] perf, persistent: Kernel updates for perf tool integration |
| |
On Tue, Jun 25, 2013 at 07:57:29PM +0200, Robert Richter wrote: > But what options there are to detach the event from all processes and > make it persistent?
Something like this:
ioctl(fd, PERF_EVENT_IOC_DETACH, 0);
I guess this could simply set the persistent flag so that the rest of the perf code knows not to destroy event buffers etc.
I don't have an idea about the reattaching though because you don't have a file descriptor there.
Maybe for that we could really use the sys_perf_event_open() with flags set to PERF_FLAG_PERSISTENT to note that we want to reattach to the persistent event instead of opening a new one.
Something to that effect...
-- Regards/Gruss, Boris.
Sent from a fat crate under my desk. Formatting is fine. --
| |