systemtap运行时出现的警告:
WARNING: no or bad debug frame hdr
WARNING: No binary search table for eh frame, doing slow linear search for stap_6b2ef5c1e5602d6bc0d0baf781ad5db_12420
WARNING: DWARF expression stack underflow in CFI
WARNING: Too many CFI instuctions
WARNING: Number of errors: 0, skipped probes: 28
火焰图:
nginx是编译安装的,已加上--with-debug选项。
上面的一切说明是否正常?