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| author | Zheng Yejian <zhengyejian1@huawei.com> | 2022-11-10 10:03:19 +0800 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2022-11-23 19:08:31 -0500 |
| commit | 96e6122cb79616c622ae0d025eb9f981120b568d (patch) | |
| tree | 27a0016f9f2a0aacc103086354513c77b2f16136 /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | a76d4648a0bbd624a1322c15073b5032a5135f01 (diff) | |
tracing: Optimize event type allocation with IDA
After commit 060fa5c83e67 ("tracing/events: reuse trace event ids after
overflow"), trace events with dynamic type are linked up in list
'ftrace_event_list' through field 'trace_event.list'. Then when max
event type number used up, it's possible to reuse type number of some
freed one by traversing 'ftrace_event_list'.
As instead, using IDA to manage available type numbers can make codes
simpler and then the field 'trace_event.list' can be dropped.
Since 'struct trace_event' is used in static tracepoints, drop
'trace_event.list' can make vmlinux smaller. Local test with about 2000
tracepoints, vmlinux reduced about 64KB:
before：-rwxrwxr-x 1 root root 76669448 Nov 8 17:14 vmlinux
after： -rwxrwxr-x 1 root root 76604176 Nov 8 17:15 vmlinux
Link: https://lkml.kernel.org/r/20221110020319.1259291-1-zhengyejian1@huawei.com
Signed-off-by: Zheng Yejian <zhengyejian1@huawei.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions