perf/core improvements and fixes:
Infrastructure:
- Do not consider empty files as valid srclines (Milian Wolff)
- Fix wrong size in perf_record_mmap for last kernel module,
which resulted in erroneous symbol resolution in at least s390x (Thomas Richter)
- Add missing newline to expr parser error messages (Andi Kleen)
- Fix saved values rbtree lookup in 'perf stat' (Andi Kleen)
- Add support for shell based tests in 'perf test', add a few that
run 'perf probe', 'perf trace', using kprobes, uprobes to check
the output of those tools and the effects on the system, checking,
for instance, DWARF backtraces from uprobes (Arnaldo Carvalho de Melo)
Arch specific:
- Add ppc64le to audit uname list in the python scripting support (Naveen N. Rao)
- Update POWER9 vendor events tables (Sukadev Bhattiprolu)
- Fix module symbol adjustment for s390x (Thomas Richter)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
perf test shell: Add uprobes + backtrace ping test
Installs a probe on libc's inet_pton function, that will use uprobes,
then use 'perf trace' on a ping to localhost asking for just one packet
with the a backtrace 3 levels deep, check that it is what we expect.
This needs no debuginfo package, all is done using the libc ELF symtab
and the CFI info in the binaries.
Testing it:
# perf test ping
61: probe libc's inet_pton & backtrace it with ping : Ok
In verbose mode:
# perf test -v ping
61: probe libc's inet_pton & backtrace it with ping :
--- start ---
test child forked, pid 1007
PING ::1(::1) 56 data bytes
64 bytes from ::1: icmp_seq=1 ttl=64 time=0.058 ms
--- ::1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.058/0.058/0.058/0.000 ms
0.000 probe_libc:inet_pton:(7f75fce12a20))
__GI___inet_pton (/usr/lib64/libc-2.24.so)
getaddrinfo (/usr/lib64/libc-2.24.so)
_init (/usr/bin/ping)
test child finished with 0
---- end ----
probe libc's inet_pton & backtrace it with ping: Ok
#
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-idrntt4nbg15aafu8hjmv7sk@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1 file changed
