(2013/10/26 20:16), Frank Ch. Eigler wrote: > Pekka Enberg <penb...@kernel.org> writes: > >> Is there a technical reason why 'perf list' could not show all the >> available SDT markers on a system and that the 'mark to event' >> mapping cannot happen automatically? [...] > > A quick experiment with: > > find `echo $PATH | tr : ' '` -type f -perm -555 | > xargs readelf -n 2>/dev/null | > grep STAP 2>/dev/null > > suggests reasonable performance for my F19 workstation (a second or > two over ~6000 executables), once all the ELF content is in the block > cache. According to a stap eventcount.stp run, that required about > 50000 syscall.read events. > > Note that a $PATH search excludes shared libraries, which can also > carry <sys/sdt.h> markers. Adding /usr/lib* in more than doubles the > work, then there's /usr/libexec etc.
To find all system libraries, we can use ldconfig. $ ldconfig --print-cache shows what dynamic libraries will be loaded. On my own laptop (running ubuntu13.04) shows ~1000 libs. Thank you, -- Masami HIRAMATSU IT Management Research Dept. Linux Technology Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: masami.hiramatsu...@hitachi.com -- 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/
