On Mon, Sep 09, 2013 at 01:36:41PM +0200, Jiri Olsa wrote: > On Mon, Sep 09, 2013 at 01:17:49PM +0200, Peter Zijlstra wrote: > > On Sun, Sep 01, 2013 at 12:36:11PM +0200, Jiri Olsa wrote: > This patchset is actually doing 3 essential things: > 1) adds new perf data format version (v3) > 2) adds class/object to handle perf data file > 3) adds record '-M size' option
So the -M thing is where the multiple files stuff comes from, right? What's the purpose of this? Why would I care how big these files get, surely filesystems handle 4g+ files these days. > > The only reason I wanted this is so that each thread can write its own > > data. The current one file thing is an immense bottle-neck for big > > machines. > > > > I haven't considered the thread based storage yet, but I > think having the simplified format and centralized file > handling will only help. Please do consider it now, it'd suck to have to change the file format thing yet again. With both per-thread and size limited your filename generation needs some extra bits I suppose. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
