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Remove trailing whitespace

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Nick Mathewson 2017-01-13 12:31:06 -05:00
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commit c93428f457
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doc/HACKING/HelpfulTools.md
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@ -173,25 +173,25 @@ Here are some basic instructions
* `opcontrol --dump;` * `opcontrol --dump;`
* `opreport -l that_dir/*` * `opreport -l that_dir/*`
- Profit - Profit
Profiling Tor with perf Profiling Tor with perf
----------------------- -----------------------
This works with a running Tor, and requires root. This works with a running Tor, and requires root.
1. Decide how long you want to profile for. Start with (say) 30 seconds. If that 1. Decide how long you want to profile for. Start with (say) 30 seconds. If that
works, try again with longer times. works, try again with longer times.
2. Find the PID of your running tor process. 2. Find the PID of your running tor process.
3. Run `perf record --call-graph dwarf -p <PID> sleep <SECONDS>` 3. Run `perf record --call-graph dwarf -p <PID> sleep <SECONDS>`
(You may need to do this as root.) (You may need to do this as root.)
You might need to add `-e cpu-clock` as an option to the perf record line You might need to add `-e cpu-clock` as an option to the perf record line
above, if you are on an older CPU without access to hardware profiling above, if you are on an older CPU without access to hardware profiling
events, or in a VM, or something. events, or in a VM, or something.
4. Now you have a perf.data file. Have a look at it with `perf report 4. Now you have a perf.data file. Have a look at it with `perf report
--no-children --sort symbol,dso` or `perf report --no-children --sort --no-children --sort symbol,dso` or `perf report --no-children --sort
symbol,dso --stdio --header`. How does it look? symbol,dso --stdio --header`. How does it look?
@ -220,7 +220,7 @@ performance! See the gperftools manual for more info, but basically:
2. Run `env CPUPROFILE=/tmp/profile src/or/tor -f <path/torrc>`. The profile file 2. Run `env CPUPROFILE=/tmp/profile src/or/tor -f <path/torrc>`. The profile file
is not written to until Tor finishes execuction. is not written to until Tor finishes execuction.
3. Run `pprof src/or/tor /tm/profile` to start the REPL. 3. Run `pprof src/or/tor /tm/profile` to start the REPL.
Generating and analyzing a callgraph Generating and analyzing a callgraph