bcc release v0.21.0

  * Support for kernel up to 5.13
  * support for debug information from libdebuginfod
  * finished support for map elements items_*_batch() APIs
  * add atomic_increment() API
  * support attach_func() and detach_func() in python
  * fix displaying PID instead of TID for many tools
  * new tools: kvmexit.py
  * new libbpf-tools: gethostlatency, statsnoop, fsdist and solisten
  * fix tools ttysnoop/readahead for newer kernels
  * doc update and bug fixes

bcc release v0.20.0

• Support for kernel up to 5.12
• Some basic support for MIPS
• added bpf_map_lookup_batch and bpf_map_delete_batch support
• tools/funclatency.py support nested or recursive functions
• tools/biolatency.py can optionally print out average/total value
• fix possible marco HAVE_BUILTIN_BSWAP redefine warning for kernel >= 5.10.
• new tools: virtiostat
• new libbpf-tools: ext4dist
• doc update and bug fixes

bcc release v0.19.0

  * Support for kernel up to 5.11
  * allow BCC as a cmake subproject
  * add LPORT support in tcpconnlat and tcpconnect
  * added bpf_map_lookup_and_delete_batch support
  * new tools: virtiostat
  * new libbpf-tools: cpufreq, funclatency, cachestat
  * add install target to libbpf-tools
  * a few lua fixes
  * doc update and bug fixes

bcc release v0.18.0

 * Support for kernel up to 5.10
 * add bpf kfunc/kretfunc C++ example
 * add PT_REGS_PARMx_SYSCALL helper macro
 * biolatency: allow json output
 * biolatpcts: support measuring overall latencies between two events
 * fix build when ENABLE_CLANG_JIT is disabled
 * doc update and bug fixes

bcc release v0.17.0

• Support for kernel up to 5.9
• usdt: add uprobe refcnt support
• use newer llvm/clang versions in debian packaging if possible
• add bpf iterator C++ support
• new bcc tools: tcprtt, netqtop, swapin, tcpsynbl, threadsnoop
• tcpconnect: add DNS correlation to connect tracking
• new libbpf-tools: llcstat, numamove, runqlen, runqlat, softirgs, hardirqs
• doc update, bug fixes and some additional arguments for tools

bcc release v0.16.0

• Support for kernel up to 5.8
• trace.py: support kprobe/uprobe func offset
• support raw perf config for perf_event_open in python
• add BPFQueueStackTable support
• added Ringbuf support support
• libbpf-tools: readahead, biosnoop, bitesize, tcpconnlat, biopattern, biostacks
• bug fixes and some additional arguments for tools

bcc release v0.15.0

• Support for kernel up to 5.7
• new tools: funcinterval.py, dirtop.py
• support lsm bpf programs
• support multiple pid/tids for offwaketime
• usdt: add helpers to set semaphore values
• turn off x86 jump table optimization during jit compilation
• add support to use bpf_probe_read[str}{_user,kernel} in all bpf
• programs, fail back to old bpf_probe_read[_str] for old kernels
• tools: add filtering by mount namespace
• libbpf-tools: cpudist, syscount, execsnoop, vfsstat
• lots of bug fixes and a few additional arguments for tools

bcc release v0.14.0

• Support for kernel up to 5.6
• new tools: biolatpcts.py
• libbpf-tools: tools based on CORE and libbpf library directly
• add --cgroupmap to various tools, filtering based cgroup
• support kfunc (faster kprobe) for vfsstat, klockstat and opensnoop
• lots of bug fixes and a few additional arguments for tools

bcc release v0.13.0

• Support for kernel up to 5.5
• bindsnoop tool to track tcp/udp bind information
• added compile-once run-everywhere based libbpf-tools, currently
  only runqslower is implemented.
• new map support: sockhash, sockmap, sk_storage, cgroup_storage
• enable to run github actions on the diff
• cgroupmap based cgroup filtering for opensnoop, execsnoop and bindsnoop.
• lots of bug fixes.

bcc release v0.12.0

the main changes from v0.11.0 to v0.12.0 tag:
  * Support for kernel up to 5.4
  * klockstat tool to track kernel mutex lock statistics
  * cmake option CMAKE_USE_LIBBPF_PACKAGE to build a bcc shared library
    linking with distro libbpf_static.a
  * new map.lookup_or_try_init() API to remove hidden return in
    map.lookup_or_init()
  * BPF_ARRAY_OF_MAPS and BPF_HASH_OF_MAPS support
  * support symbol offset for uprobe in both C++ and python API,
    kprobe already has the support
  * bug fixes for trace.py, tcpretrans.py, runqslower.py, etc.