Minor documentation edits

Author: apangin

docs/Heatmap.md

@@ -79,10 +79,10 @@ retain stacks with matching frames only. All other stacks will be filtered out.
 
 ![](/.assets/images/heatmap6.png)
 
-### Producing heatmaps
+## Producing heatmaps
 
-Use [`jfrconv`](ConverterUsage.md) tool with `-o heatmap` option
-to generate heatmap from a recording in JFR format.
+Heatmaps can only be generated from recordings in JFR format.
+Run [`jfrconv`](ConverterUsage.md) tool with `-o heatmap` option.
 
 Standard `jfrconv` options (`--cpu`, `--alloc`, `--from`/`--to`, `--simple`, etc.)
 are also applicable to heatmaps.

docs/ProfilerOptions.md

@@ -37,6 +37,7 @@ The below options are `action`s for async-profiler and common for both `asprof`
 | `--nativemem N`    | `nativemem=N`     | Native memory allocation profiling. N, if specified is the interval in bytes or in other units, if N is followed by `k` (kilobytes), `m` (megabytes), or `g` (gigabytes). Default N is 0.                                                                                                                                                                                                                                                                                                                                                   |
 | `--nofree`         | `nofree`          | Will not record free calls in native memory allocation profiling. This is relevant when tracking memory leaks is not important and there are lots of free calls.                                                                                                                                                                                                                                                                                                                                                                            |
 | `--lock DURATION`  | `lock=DURATION`   | In lock profiling mode, sample contended locks when total lock duration overflows the threshold.                                                                                                                                                                                                                                                                                                                                                                                                                                            |
+| `--wall INTERVAL`  | `wall=INTERVAL`   | Wall clock profiling interval. Use this option instead of `-e wall` to enable wall clock profiling with another event, typically `cpu`.<br>Example: `asprof -e cpu --wall 100ms -f combined.jfr 8983`.                                                                                                                                                                                                                                                                                                                                      |
 | `-j N`             | `jstackdepth=N`   | Sets the maximum stack depth. The default is 2048.<br>Example: `asprof -j 30 8983`                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
 | `-I PATTERN`       | `include=PATTERN` | Filter stack traces by the given pattern(s). `-I` defines the name pattern that _must_ be present in the stack traces. `-I` can be specified multiple times. A pattern may begin or end with a star `*` that denotes any (possibly empty) sequence of characters.<br>Example: `asprof -I 'Primes.*' -I 'java/*' 8983`                                                                                                                                                                                                                       |
 | `-X PATTERN`       | `exclude=PATTERN` | Filter stack traces by the given pattern(s). `-X` defines the name pattern that _must not_ occur in any of stack traces in the output. `-X` can be specified multiple times. A pattern may begin or end with a star `*` that denotes any (possibly empty) sequence of characters.<br>Example: `asprof -X '*Unsafe.park*' 8983`                                                                                                                                                                                                              |

docs/ProfilingModes.md

@@ -136,7 +136,7 @@ Run an application with `nativemem` profiler that dumps recordings in JFR format
 LD_PRELOAD=/path/to/libasyncProfiler.so ASPROF_COMMAND=start,nativemem,total,loop=10m,cstack=dwarf,file=profile-%t.jfr NativeApp [args]
 ```
 
-Then run `jfrconv` to generate memory leak reports as flame graphs:
+Then run `jfrconv` to generate memory leak report as a flame graph:
 
 ```
 jfrconv --total --nativemem --leak <profile>.jfr <profile>-leak.html

src/main/main.cpp

@@ -493,7 +493,8 @@ int main(int argc, const char** argv) {
         } else if (arg == "--width" || arg == "--height" || arg == "--minwidth") {
             format << "," << (arg.str() + 2) << "=" << args.next();
 
-        } else if (arg == "--reverse" || arg == "--inverted" || arg == "--samples" || arg == "--total" || arg == "--sched" || arg == "--live" || arg == "--nofree") {
+        } else if (arg == "--reverse" || arg == "--inverted" || arg == "--samples" || arg == "--total" ||
+                   arg == "--sched" || arg == "--live" || arg == "--nofree") {
             format << "," << (arg.str() + 2);
 
         } else if (arg == "--alloc" || arg == "--nativemem" || arg == "--lock" || arg == "--wall" ||