16c00db4bb
Pull AFS fixes from David Howells:
"Here's a set of patches that fix a number of bugs in the in-kernel AFS
client, including:
- Fix directory locking to not use individual page locks for
directory reading/scanning but rather to use a semaphore on the
afs_vnode struct as the directory contents must be read in a single
blob and data from different reads must not be mixed as the entire
contents may be shuffled about between reads.
- Fix address list parsing to handle port specifiers correctly.
- Only give up callback records on a server if we actually talked to
that server (we might not be able to access a server).
- Fix some callback handling bugs, including refcounting,
whole-volume callbacks and when callbacks actually get broken in
response to a CB.CallBack op.
- Fix some server/address rotation bugs, including giving up if we
can't probe a server; giving up if a server says it doesn't have a
volume, but there are more servers to try.
- Fix the decoding of fetched statuses to be OpenAFS compatible.
- Fix the handling of server lookups in Cache Manager ops (such as
CB.InitCallBackState3) to use a UUID if possible and to handle no
server being found.
- Fix a bug in server lookup where not all addresses are compared.
- Fix the non-encryption of calls that prevents some servers from
being accessed (this also requires an AF_RXRPC patch that has
already gone in through the net tree).
There's also a patch that adds tracepoints to log Cache Manager ops
that don't find a matching server, either by UUID or by address"
* tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
afs: Fix the non-encryption of calls
afs: Fix CB.CallBack handling
afs: Fix whole-volume callback handling
afs: Fix afs_find_server search loop
afs: Fix the handling of an unfound server in CM operations
afs: Add a tracepoint to record callbacks from unlisted servers
afs: Fix the handling of CB.InitCallBackState3 to find the server by UUID
afs: Fix VNOVOL handling in address rotation
afs: Fix AFSFetchStatus decoder to provide OpenAFS compatibility
afs: Fix server rotation's handling of fileserver probe failure
afs: Fix refcounting in callback registration
afs: Fix giving up callbacks on server destruction
afs: Fix address list parsing
afs: Fix directory page locking
210 lines
4.1 KiB
Plaintext
210 lines
4.1 KiB
Plaintext
perf-bench(1)
|
|
=============
|
|
|
|
NAME
|
|
----
|
|
perf-bench - General framework for benchmark suites
|
|
|
|
SYNOPSIS
|
|
--------
|
|
[verse]
|
|
'perf bench' [<common options>] <subsystem> <suite> [<options>]
|
|
|
|
DESCRIPTION
|
|
-----------
|
|
This 'perf bench' command is a general framework for benchmark suites.
|
|
|
|
COMMON OPTIONS
|
|
--------------
|
|
-r::
|
|
--repeat=::
|
|
Specify amount of times to repeat the run (default 10).
|
|
|
|
-f::
|
|
--format=::
|
|
Specify format style.
|
|
Current available format styles are:
|
|
|
|
'default'::
|
|
Default style. This is mainly for human reading.
|
|
---------------------
|
|
% perf bench sched pipe # with no style specified
|
|
(executing 1000000 pipe operations between two tasks)
|
|
Total time:5.855 sec
|
|
5.855061 usecs/op
|
|
170792 ops/sec
|
|
---------------------
|
|
|
|
'simple'::
|
|
This simple style is friendly for automated
|
|
processing by scripts.
|
|
---------------------
|
|
% perf bench --format=simple sched pipe # specified simple
|
|
5.988
|
|
---------------------
|
|
|
|
SUBSYSTEM
|
|
---------
|
|
|
|
'sched'::
|
|
Scheduler and IPC mechanisms.
|
|
|
|
'mem'::
|
|
Memory access performance.
|
|
|
|
'numa'::
|
|
NUMA scheduling and MM benchmarks.
|
|
|
|
'futex'::
|
|
Futex stressing benchmarks.
|
|
|
|
'all'::
|
|
All benchmark subsystems.
|
|
|
|
SUITES FOR 'sched'
|
|
~~~~~~~~~~~~~~~~~~
|
|
*messaging*::
|
|
Suite for evaluating performance of scheduler and IPC mechanisms.
|
|
Based on hackbench by Rusty Russell.
|
|
|
|
Options of *messaging*
|
|
^^^^^^^^^^^^^^^^^^^^^^
|
|
-p::
|
|
--pipe::
|
|
Use pipe() instead of socketpair()
|
|
|
|
-t::
|
|
--thread::
|
|
Be multi thread instead of multi process
|
|
|
|
-g::
|
|
--group=::
|
|
Specify number of groups
|
|
|
|
-l::
|
|
--nr_loops=::
|
|
Specify number of loops
|
|
|
|
Example of *messaging*
|
|
^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
---------------------
|
|
% perf bench sched messaging # run with default
|
|
options (20 sender and receiver processes per group)
|
|
(10 groups == 400 processes run)
|
|
|
|
Total time:0.308 sec
|
|
|
|
% perf bench sched messaging -t -g 20 # be multi-thread, with 20 groups
|
|
(20 sender and receiver threads per group)
|
|
(20 groups == 800 threads run)
|
|
|
|
Total time:0.582 sec
|
|
---------------------
|
|
|
|
*pipe*::
|
|
Suite for pipe() system call.
|
|
Based on pipe-test-1m.c by Ingo Molnar.
|
|
|
|
Options of *pipe*
|
|
^^^^^^^^^^^^^^^^^
|
|
-l::
|
|
--loop=::
|
|
Specify number of loops.
|
|
|
|
Example of *pipe*
|
|
^^^^^^^^^^^^^^^^^
|
|
|
|
---------------------
|
|
% perf bench sched pipe
|
|
(executing 1000000 pipe operations between two tasks)
|
|
|
|
Total time:8.091 sec
|
|
8.091833 usecs/op
|
|
123581 ops/sec
|
|
|
|
% perf bench sched pipe -l 1000 # loop 1000
|
|
(executing 1000 pipe operations between two tasks)
|
|
|
|
Total time:0.016 sec
|
|
16.948000 usecs/op
|
|
59004 ops/sec
|
|
---------------------
|
|
|
|
SUITES FOR 'mem'
|
|
~~~~~~~~~~~~~~~~
|
|
*memcpy*::
|
|
Suite for evaluating performance of simple memory copy in various ways.
|
|
|
|
Options of *memcpy*
|
|
^^^^^^^^^^^^^^^^^^^
|
|
-l::
|
|
--size::
|
|
Specify size of memory to copy (default: 1MB).
|
|
Available units are B, KB, MB, GB and TB (case insensitive).
|
|
|
|
-f::
|
|
--function::
|
|
Specify function to copy (default: default).
|
|
Available functions are depend on the architecture.
|
|
On x86-64, x86-64-unrolled, x86-64-movsq and x86-64-movsb are supported.
|
|
|
|
-l::
|
|
--nr_loops::
|
|
Repeat memcpy invocation this number of times.
|
|
|
|
-c::
|
|
--cycles::
|
|
Use perf's cpu-cycles event instead of gettimeofday syscall.
|
|
|
|
*memset*::
|
|
Suite for evaluating performance of simple memory set in various ways.
|
|
|
|
Options of *memset*
|
|
^^^^^^^^^^^^^^^^^^^
|
|
-l::
|
|
--size::
|
|
Specify size of memory to set (default: 1MB).
|
|
Available units are B, KB, MB, GB and TB (case insensitive).
|
|
|
|
-f::
|
|
--function::
|
|
Specify function to set (default: default).
|
|
Available functions are depend on the architecture.
|
|
On x86-64, x86-64-unrolled, x86-64-stosq and x86-64-stosb are supported.
|
|
|
|
-l::
|
|
--nr_loops::
|
|
Repeat memset invocation this number of times.
|
|
|
|
-c::
|
|
--cycles::
|
|
Use perf's cpu-cycles event instead of gettimeofday syscall.
|
|
|
|
SUITES FOR 'numa'
|
|
~~~~~~~~~~~~~~~~~
|
|
*mem*::
|
|
Suite for evaluating NUMA workloads.
|
|
|
|
SUITES FOR 'futex'
|
|
~~~~~~~~~~~~~~~~~~
|
|
*hash*::
|
|
Suite for evaluating hash tables.
|
|
|
|
*wake*::
|
|
Suite for evaluating wake calls.
|
|
|
|
*wake-parallel*::
|
|
Suite for evaluating parallel wake calls.
|
|
|
|
*requeue*::
|
|
Suite for evaluating requeue calls.
|
|
|
|
*lock-pi*::
|
|
Suite for evaluating futex lock_pi calls.
|
|
|
|
|
|
SEE ALSO
|
|
--------
|
|
linkperf:perf[1]
|