User`s guide

perf Utility

• Add support for per-association statistics by implementing the SCTP_GET_ASSOC_STATS call for the

Stream Control Transmission Protocol (SCTP). (3.8)

• Add a sysctl that allows the selection of the HMAC algorithm (static or dynamic) used by SCTP. (3.8)

• Add support for SO_ATTACH_FILTER required to save the full state of a socket. (3.8)

• Convert tun/tap into a multiqueue device and expose the queues as file descriptors in user space. (3.8)

A.10 perf Utility

• Add the --symfs option to perf annotate. (3.2)

• Add the drop monitor script. (3.2)

• Add the -o and --append options to perf stat. (3.2)

• Add the -M option. (3.2)

• Add annotation output controls to all perf tools that have integrated annotation. (3.2)

• Include information about the host environment in perf.data:

HEADER_HOSTNAME Host name.

HEADER_OSRELEASE Kernel release number.

HEADER_ARCH Hardware architecture.

HEADER_CPUDESC Generic CPU description.

HEADER_NRCPUS Number of online, available CPUs.

HEADER_CMDLINE perf command line.

HEADER_VERSION perf version.

HEADER_TOPOLOGY CPU topology.

HEADER_EVENT_DESC Full event description (attrs).

HEADER_CPUID Easy-to-parse, low-level CPU identification.

(3.2)

• Accept FIFOs as input files. (3.3)

• Add -a option for system-wide profiling. (3.3)

• Implement printing snapshots to files. (3.6)

• Add sort by source line number. (3.6)

• Add PMU event alias support. (3.6)

• Add support for perf kvm stat to analyze kvm vmexit, mmio, and ioport. (3.7)

• Add union member access. (3.7)