Messages in this thread | | | Subject | Re: [announce] Performance Counters for Linux, v6 | From | Peter Zijlstra <> | Date | Fri, 20 Feb 2009 23:47:58 +0100 |
| |
On Fri, 2009-02-20 at 14:38 -0800, Corey Ashford wrote: > There may be other non-event-related changes that will not be handled > quite as well in this way. In the original email I hinted at that we > may want an option for mmap'd sample buffers at some point, and so I'm > not clear how you'd provide an ABI to request mmap'd buffers (you would > probably need to be able to request the size and get back a pointer to > the mmap'd buffer). Would this be done through a special > sys_perf_counter_open call? Or through a subsequent ioctl call on the > group leader after an open (which requires the counters to be initially > disabled), etc.
What's stopping a regular mmap() call using the fd obtained from sys_perf_counter_open() ?
| |