-yy option of strace is really useful but slow especially for inet sockets because the current implementation of socket diag provides only an interface returning ALL inet sockets. Filtering by an address is prepared but it doesn't help strace; strace wants filtering by an inode number of socketfs.
I'm working on improving the performance of -yy option. Two approaches: A. adding "filtering by inode number" to socket diag of linux, and B. adding a layer for caching addresses of inet socket to strace This patch series implement B. B. has some limitations. It has no effects other than TCP(v6) socket. B. doesn't improve the performance for UDP(v6) socket. A. is superior to B. in this aspect. However, A. requires user to update the installed linux. A. is working in progress. A. and B. work well together. Masatake YAMATO (3): Introduce socket address information caching(scache) layer Print the hit rate of socket address cache with -C option Adapt TCP and TCPv6 to the socket address caching layer defs.h | 2 + socketutils.c | 360 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-- strace.c | 5 +- util.c | 28 +++-- 4 files changed, 374 insertions(+), 21 deletions(-) -- 2.1.0 ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Strace-devel mailing list Strace-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/strace-devel
