* [lkp] [+72 bytes kernel size regression] [i386-tinyconfig] [68c6c15638] perf/core: Introduce perf_prepare_header()
@ 2023-01-17 22:43 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2023-01-17 22:43 UTC (permalink / raw)
To: Namhyung Kim; +Cc: lkp, oe-kbuild-all
FYI, we noticed a +72 bytes kernel size regression due to commit:
commit: 68c6c15638eb6627c506b798cd42ea3fe235219b (perf/core: Introduce perf_prepare_header())
https://git.kernel.org/cgit/linux/kernel/git/namhyung/linux-perf.git perf/prepare-sample-v3
Details as below (size data is obtained by `nm --size-sort vmlinux`):
a5b83450: perf/core: Do not pass header for sample id init
68c6c156: perf/core: Introduce perf_prepare_header()
+---------------------------------+----------+----------+-------+
| symbol | a5b83450 | 68c6c156 | delta |
+---------------------------------+----------+----------+-------+
| bzImage | 496480 | 496544 | 64 |
| nm.T.perf_prepare_header | 0 | 53 | 53 |
| nm.T.intel_pmu_drain_bts_buffer | 490 | 511 | 21 |
| nm.t.perf_sample_data_size | 0 | 15 | 15 |
| nm.T.perf_event_output_backward | 78 | 93 | 15 |
| nm.T.perf_event_output_forward | 78 | 93 | 15 |
| nm.T.perf_event_output | 84 | 97 | 13 |
| nm.T.perf_prepare_sample | 1513 | 1453 | -60 |
+---------------------------------+----------+----------+-------+
Thanks
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