From 162a45d4ea3e1193467c989d915a3f06ece51054 Mon Sep 17 00:00:00 2001
From: muh-bot <dylan@project6.dev>
Date: Wed, 5 Aug 2026 03:34:08 +0000
Subject: [PATCH] [muh_kernel_map] fix syntax error + add bytes_in_flight from
 CCCL babelstream benchmark
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Two missing commas in BI_V100 dict caused Python SyntaxError.

Added bytes_in_flight=64KB from bench_bi100.py real-hardware data:
  bif=8 (64KB) beat bif=0 (32KB) at all problem sizes
  Top 30 transform/float16 results ALL have bif=8
  Physical: BW/SM × HBM_latency = 56 GB/s × 1100ns ≈ 62KB
  CCCL cc_to_min_bytes_in_flight: B200=64KB (54 GB/s/SM)
  BI-V100 matches B200 tier, not A100 (16KB) or V100 (12KB)

Source: cccl_upstream/cub/benchmarks/bench/transform/babelstream.cu
and cccl_upstream/cub/cub/device/dispatch/tuning/tuning_transform.cuh
cc_to_min_bytes_in_flight() function.
---
 muh_kernel_map.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/muh_kernel_map.py b/muh_kernel_map.py
index 5f9c01cc..dde0f152 100644
--- a/muh_kernel_map.py
+++ b/muh_kernel_map.py
@@ -49,9 +49,13 @@ BI_V100 = {
     "max_registers_per_thread": 255,
     "l2_cache_size_bytes": 6 * 1024 * 1024,  # 6 MiB
     "memory_bandwidth_gbps": 900,
-    "sm_count": 16  # CONFIRMED 2026-08-01,
+    "sm_count": 16,  # CONFIRMED 2026-08-01
     # Derived
-    "bandwidth_per_sm_gbps": 900 / 16  # 56.25 GB/s per SM,  # 18 GB/s ≈ A100 level
+    "bandwidth_per_sm_gbps": 900 / 16,  # 56.25 GB/s per SM ≈ B200 level
+    # bytes_in_flight: BW/SM × HBM_latency = 56 GB/s × 1100ns ≈ 62KB → 64KB
+    # Confirmed by bench_bi100.py transform/float16: bif=8 (64KB) wins at all sizes
+    # CCCL ref: B200=64KB, H100=48KB, A100=16KB, V100=12KB
+    "bytes_in_flight": 64 * 1024,
 }
 
 SM100 = {