Minor bug fixes in example notebook

Plumb through `prefix` so it's more convenient to explicitly set the
input data path.

.github/container/nsys_jax/nsys_jax/__init__.py

@@ -7,7 +7,7 @@
 from .data_loaders import load_profiler_data
 from .protobuf import xla_module_metadata
 from .protobuf_utils import compile_protos, ensure_compiled_protos_are_importable
-from .utils import remove_autotuning_detail, remove_child_ranges
+from .utils import default_data_prefix, remove_autotuning_detail, remove_child_ranges
 from .visualization import create_flamegraph, display_flamegraph
 
 __all__ = [
@@ -16,6 +16,7 @@
     "calculate_collective_metrics",
     "compile_protos",
     "create_flamegraph",
+    "default_data_prefix",
     "display_flamegraph",
     "ensure_compiled_protos_are_importable",
     "generate_compilation_statistics",

.github/container/nsys_jax/nsys_jax/analyses/Analysis.ipynb

@@ -12,6 +12,7 @@
     "from nsys_jax import (\n",
     "    align_profiler_data_timestamps,\n",
     "    apply_warmup_heuristics,\n",
+    "    default_data_prefix,\n",
     "    display_flamegraph,\n",
     "    ensure_compiled_protos_are_importable,\n",
     "    generate_compilation_statistics,\n",
@@ -23,6 +24,18 @@
     "import numpy as np"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7a91f0e7-17da-4534-8ea9-29bcf3742567",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Set the input data to use. default_data_prefix() checks the NSYS_JAX_DEFAULT_PREFIX environment variable, and if that is\n",
+    "# not set then the current working directory is used. Use pathlib.Path if setting this explicitly.\n",
+    "prefix = default_data_prefix()"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
@@ -32,7 +45,7 @@
    "source": [
     "# Make sure that the .proto files under protos/ have been compiled to .py, and\n",
     "# that those generated .py files are importable.]\n",
-    "compiled_dir = ensure_compiled_protos_are_importable()"
+    "compiled_dir = ensure_compiled_protos_are_importable(prefix=prefix)"
    ]
   },
   {
@@ -43,7 +56,7 @@
    "outputs": [],
    "source": [
     "# Load the runtime profile data\n",
-    "all_data = load_profiler_data()\n",
+    "all_data = load_profiler_data(prefix)\n",
     "# Remove some detail from the autotuner\n",
     "all_data = remove_autotuning_detail(all_data)\n",
     "# Align GPU timestamps across profiles collected by different Nsight Systems processes\n",
@@ -82,16 +95,14 @@
    "source": [
     "This data frame has a three-level index:\n",
     "- `ProgramId` is an integer ID that uniquely identifies the XLA module\n",
-    "- This is the `ProgramExecution`-th execution of the module within the profiles. You may see this starting from 1, not 0, because of the `warmup_removal_heuristics` option passed to `load_profiler_data`.\n",
+    "- This is the `ProgramExecution`-th execution of the module within the profiles. You may see this starting from 2, not 0, because of the `warmup_removal_heuristics` option passed to `load_profiler_data`.\n",
     "- `Device` is the global (across multiple nodes and processes) index of the GPU on which the module execution took place\n",
     "\n",
     "The columns are as follows:\n",
     "- `Name`: the name of the XLA module; this should always be the same for a given `ProgramId`\n",
     "- `NumThunks`: the number of thunks executed inside this module execution\n",
     "- `ProjStartMs`: the timestamp of the start of the module execution on the GPU, in milliseconds\n",
     "- `ProjDurMs`: the duration of the module execution on the GPU, in milliseconds\n",
-    "- `OrigStartMs`: the timestamp of the start of the module launch **on the host**, in milliseconds. *i.e.* `ProjStartMs-OrigStartMs` is something like the launch latency of the first kernel\n",
-    "- `OrigDurMs`: the duration of the module launch **on the host**, in milliseconds\n",
     "- `LocalDevice`: the index within the node/slice of the GPU on which the module execution took place\n",
     "- `Process`: the global (across multiple nodes) index of the process\n",
     "- `Slice`: the global index of the node/slice; devices within the same node/slice should have faster interconnects than to devices in different slices\n",
@@ -117,13 +128,13 @@
    "id": "7727d800-13d3-4505-89e8-80a5fed63512",
    "metadata": {},
    "source": [
-    "Here the index has four levels. `ProgramId`, `ProgramExecution` and `Device` have the same meanings as in `module_df`.\n",
+    "Here the index has four levels. `ProgramId`, `ProgramExecution` and `Device` have the same meanings as in `steady_state.module`.\n",
     "The fourth level (in the 3rd position) shows that this row is the `ThunkIndex`-th thunk within the `ProgramExecution`-th execution of XLA module `ProgramId`.\n",
     "Note that a given thunk can be executed multiple times within the same module, so indexing on the thunk name would not be unique.\n",
     "\n",
     "The columns are as follows:\n",
     "- `Name`: the name of the thunk; this should be unique within a given `ProgramId` and can be used as a key to look up XLA metadata\n",
-    "- `ProjStartMs`, `OrigStartMs`, `OrigDurMs`: see above, same meaning as in `module_df`.\n",
+    "- `ProjStartMs`: see above, same meaning as in `steady_state.module`.\n",
     "- `Communication`: does this thunk represent communication between GPUs (*i.e.* a NCCL collective)? XLA overlaps communication and computation kernels, and `load_profiler_data` triggers an overlap calculation. `ProjDurMs` for a communication kernel shows only the duration that was **not** overlapped with computation kernels, while `ProjDurHiddenMs` shows the duration that **was** overlapped.\n",
     "- This is the `ThunkExecution`-th execution of this thunk for this `(ProgramId, ProgramExecution, Device)`\n",
     "\n",
@@ -299,7 +310,7 @@
     "# Print out the largest entries adding up to at least this fraction of the total\n",
     "threshold = 0.97\n",
     "compile_summary[\"FracNonChild\"] = compile_summary[\"DurNonChildMs\"] / total_compile_time\n",
-    "print(f\"Top {threshold:.0%}+ of {total_compile_time*1e-9:.2f}s compilation time\")\n",
+    "print(f\"Top {threshold:.0%}+ of {total_compile_time*1e-3:.2f}s compilation time\")\n",
     "for row in compile_summary[\n",
     "    compile_summary[\"FracNonChild\"].cumsum() <= threshold\n",
     "].itertuples():\n",
@@ -378,7 +389,7 @@
     "    program_id, thunk_name = thunk_row.Index\n",
     "    # policy=\"all\" means we may get a set of HloProto instead of a single one, if\n",
     "    # nsys-jax-combine was used and the dumped metadata were not bitwise identical\n",
-    "    hlo_modules = xla_module_metadata(program_id, policy=\"all\")\n",
+    "    hlo_modules = xla_module_metadata(program_id, policy=\"all\", prefix=prefix)\n",
     "    thunk_opcode, inst_metadata, inst_frames = hlo_modules.unique_result(\n",
     "        lambda proto: instructions_and_frames(proto, thunk_name)\n",
     "    )\n",