[doc] Added nice to reducing_variance (#1994)
* docs:added nice to reducing_variance
* Added self as contributor
diff --git a/AUTHORS b/AUTHORS
index 2170e46..a6505d6 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -56,6 +56,7 @@
Oleksandr Sochka <sasha.sochka@gmail.com>
Ori Livneh <ori.livneh@gmail.com>
Paul Redmond <paul.redmond@gmail.com>
+Prithvi Rao <ee22b024@smail.iitm.ac.in>
Radoslav Yovchev <radoslav.tm@gmail.com>
Raghu Raja <raghu@enfabrica.net>
Rainer Orth <ro@cebitec.uni-bielefeld.de>
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 54aba7b..18a49a1 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -80,6 +80,7 @@
Pascal Leroy <phl@google.com>
Paul Redmond <paul.redmond@gmail.com>
Pierre Phaneuf <pphaneuf@google.com>
+Prithvi Rao <ee22b024@smail.iitm.ac.in>
Radoslav Yovchev <radoslav.tm@gmail.com>
Raghu Raja <raghu@enfabrica.net>
Rainer Orth <ro@cebitec.uni-bielefeld.de>
diff --git a/docs/reducing_variance.md b/docs/reducing_variance.md
index e604c66..364f4af 100644
--- a/docs/reducing_variance.md
+++ b/docs/reducing_variance.md
@@ -105,23 +105,28 @@
1. Use the performance governor as [discussed
above](user_guide#disabling-cpu-frequency-scaling).
-1. Disable processor boosting by:
+2. Disable processor boosting by:
```sh
echo 0 | sudo tee /sys/devices/system/cpu/cpufreq/boost
```
See the Linux kernel's
[boost.txt](https://www.kernel.org/doc/Documentation/cpu-freq/boost.txt)
for more information.
-2. Set the benchmark program's task affinity to a fixed cpu. For example:
+3. Set the benchmark program's task affinity to a fixed cpu. For example:
```sh
taskset -c 0 ./mybenchmark
```
-3. Disabling Hyperthreading/SMT. This can be done in the Bios or using the
+4. Increase the program's scheduling priority to minimize context switches using `nice` or `chrt`:
+ ```sh
+ sudo nice -n -20 ./mybenchmark
+ sudo chrt -f 80 ./mybenchmark
+ ```
+5. Disabling Hyperthreading/SMT. This can be done in the Bios or using the
`/sys` file system (see the LLVM project's [Benchmarking
tips](https://llvm.org/docs/Benchmarking.html)).
-4. Close other programs that do non-trivial things based on timers, such as
+6. Close other programs that do non-trivial things based on timers, such as
your web browser, desktop environment, etc.
-5. Reduce the working set of your benchmark to fit within the L1 cache, but
+7. Reduce the working set of your benchmark to fit within the L1 cache, but
do be aware that this may lead you to optimize for an unrealistic
situation.
