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
37 lines
2.2 KiB
Plaintext
37 lines
2.2 KiB
Plaintext
For a higher level overview, try: perf report --sort comm,dso
|
|
Sample related events with: perf record -e '{cycles,instructions}:S'
|
|
Compare performance results with: perf diff [<old file> <new file>]
|
|
Boolean options have negative forms, e.g.: perf report --no-children
|
|
Customize output of perf script with: perf script -F event,ip,sym
|
|
Generate a script for your data: perf script -g <lang>
|
|
Save output of perf stat using: perf stat record <target workload>
|
|
Create an archive with symtabs to analyse on other machine: perf archive
|
|
Search options using a keyword: perf report -h <keyword>
|
|
Use parent filter to see specific call path: perf report -p <regex>
|
|
List events using substring match: perf list <keyword>
|
|
To see list of saved events and attributes: perf evlist -v
|
|
Use --symfs <dir> if your symbol files are in non-standard locations
|
|
To see callchains in a more compact form: perf report -g folded
|
|
Show individual samples with: perf script
|
|
Limit to show entries above 5% only: perf report --percent-limit 5
|
|
Profiling branch (mis)predictions with: perf record -b / perf report
|
|
Treat branches as callchains: perf report --branch-history
|
|
To count events in every 1000 msec: perf stat -I 1000
|
|
Print event counts in CSV format with: perf stat -x,
|
|
If you have debuginfo enabled, try: perf report -s sym,srcline
|
|
For memory address profiling, try: perf mem record / perf mem report
|
|
For tracepoint events, try: perf report -s trace_fields
|
|
To record callchains for each sample: perf record -g
|
|
To record every process run by a user: perf record -u <user>
|
|
Skip collecting build-id when recording: perf record -B
|
|
To change sampling frequency to 100 Hz: perf record -F 100
|
|
See assembly instructions with percentage: perf annotate <symbol>
|
|
If you prefer Intel style assembly, try: perf annotate -M intel
|
|
For hierarchical output, try: perf report --hierarchy
|
|
Order by the overhead of source file name and line number: perf report -s srcline
|
|
System-wide collection from all CPUs: perf record -a
|
|
Show current config key-value pairs: perf config --list
|
|
Show user configuration overrides: perf config --user --list
|
|
To add Node.js USDT(User-Level Statically Defined Tracing): perf buildid-cache --add `which node`
|
|
To report cacheline events from previous recording: perf c2c report
|