user/sven/linux.git/tools/perf/tests/code-reading.c, branch v4.4.261

Revert "perf tests: Decompress kernel module before objdump"

2018-04-24T07:32:03Z

This reverts commit b0761b57e0bf11ada4c45e68f4cba1370363d90d which is commit 94df1040b1e6aacd8dec0ba3c61d7e77cd695f26 upstream. It breaks the build of perf on 4.4.y, so I'm dropping it. Reported-by: Pavlos Parissis Reported-by: Lei Chen Reported-by: Maxime Hadjinlian Cc: Namhyung Kim Cc: Adrian Hunter Cc: Jiri Olsa Cc: David Ahern Cc: Peter Zijlstra Cc: Wang Nan Cc: kernel-team@lge.com Cc: Arnaldo Carvalho de Melo Cc: Sasha Levin Signed-off-by: Greg Kroah-Hartman

perf tests: Decompress kernel module before objdump

2018-04-13T17:50:20Z

[ Upstream commit 94df1040b1e6aacd8dec0ba3c61d7e77cd695f26 ] If a kernel modules is compressed, it should be decompressed before running objdump to parse binary data correctly. This fixes a failure of object code reading test for me. Signed-off-by: Namhyung Kim Acked-by: Adrian Hunter Acked-by: Jiri Olsa Cc: David Ahern Cc: Peter Zijlstra Cc: Wang Nan Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20170608073109.30699-8-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

perf test: Keep test result clean if '-v' not set

2015-11-03T14:45:40Z

According to [1], 'perf test' should avoid output too much information if '-v' is not set, only 'Ok', 'FAIL' or 'Skip' need to be printed. This patch removes several messages sent directly to stderr to make the output clean. Before this patch: # perf test dummy 23: Test using a dummy software event to keep tracking : (not supported) Ok After this patch: # perf test dummy 23: Test using a dummy software event to keep tracking : Skip [1] http://lkml.kernel.org/r/20151020134155.GE4400@redhat.com Signed-off-by: Wang Nan Acked-by: Namhyung Kim Tested-by: Arnaldo Carvalho de Melo Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1446547486-229499-2-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

perf machine: Add method for common kernel_map(FUNCTION) operation

2015-09-30T21:34:29Z

And it is also a step in the direction of killing the separation of data and text maps in map_groups. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-rrds86kb3wx5wk8v38v56gw8@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf machine: Use machine__kernel_map() thoroughly

2015-09-30T21:34:28Z

In places where we were using its open coded equivalent. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-khkdugcdoqy3tkszm3jdxgbe@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tests: Print objdump/dso buffers if they don't match

2015-09-14T15:50:13Z

Signed-off-by: Jan Stancek Acked-by: Adrian Hunter Cc: Corey Ashford Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/d0f42f786bc0e965918e0f422df25617a12a4021.1441181335.git.jstancek@redhat.com Signed-off-by: Arnaldo Carvalho de Melo

perf tests: Stop reading if objdump output crossed sections

2015-09-14T15:50:12Z

objdump output can span across multiple sections: Disassembly of section .text: 0000000000000008 : 8: 48 89 e5 mov %rsp,%rbp b: 53 push %rbx c: 8b 01 mov (%rcx),%eax 6b: 90 nop Disassembly of section .init.text: 0000000000000008 : 8: 00 00 add %al,(%rax) a: 00 00 add %al,(%rax) c: 48 89 e5 Stop further reading if an address starts going backwards, assuming we crossed sections. Signed-off-by: Jan Stancek Acked-by: Adrian Hunter Cc: Corey Ashford Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/9d1ea95e5f9884fdff1be6f761a2feabef37412c.1441181335.git.jstancek@redhat.com Signed-off-by: Arnaldo Carvalho de Melo

perf tests: Make objdump disassemble zero blocks

2015-09-14T15:50:11Z

Add -z parameter to avoid skipping zero blocks: ffffffff816704fe : ffffffff816704fe: 7b 34 jnp ffffffff81670534 ... ffffffff81670501 : ffffffff81670501: 0f ba e2 03 bt $0x3,%edx ffffffff81670505: 73 11 jae ffffffff81670518 Signed-off-by: Jan Stancek Acked-by: Adrian Hunter Cc: Corey Ashford Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/130c6267fbdb9af506633a9efa06f3269ff5bd2c.1441275982.git.jstancek@redhat.com Signed-off-by: Arnaldo Carvalho de Melo

perf tests: Take into account address of each objdump line

2015-09-14T15:50:10Z

objdump output can contain repeated bytes. At the moment test reads all output sequentially, assuming each address is represented in output only once: ffffffff8164efb3 : ffffffff8164efb3: c1 5d 00 eb rcrl $0xeb,0x0(%rbp) ffffffff8164efb7: 00 4c 8b 5c add %cl,0x5c(%rbx,%rcx,4) ffffffff8164efb8 : ffffffff8164efb8: 4c 8b 5c 24 30 mov 0x30(%rsp),%r11 ffffffff8164efbd: 4c 8b 54 24 38 mov 0x38(%rsp),%r10 Store objdump output to buffer according to offset calculated from address on each line. Signed-off-by: Jan Stancek Cc: Adrian Hunter Cc: Corey Ashford Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/ad13289a55d6350f7717757c7e32c2d4286402bd.1441181335.git.jstancek@redhat.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add reference counting for thread_map object

2015-06-25T18:15:50Z

Adding reference counting for thread_map object, so it could be easily shared among other objects. Using thread_map__put instead thread_map__delete and making thread_map__delete static. Signed-off-by: Jiri Olsa Cc: Adrian Hunter Cc: Andi Kleen Cc: David Ahern Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1435012588-9007-5-git-send-email-jolsa@kernel.org [ Adjustments to move it ahead of the "comm" patches ] Signed-off-by: Arnaldo Carvalho de Melo