Add detailed CPU information from Sys.cpu_info() to telemetry (#707)

* Add detailed CPU information from Sys.cpu_info() to telemetry

- Extract CPU model and speed from Sys.cpu_info()
- Display CPU model instead of generic CPU_NAME where available
- Show CPU speed in MHz for better hardware identification
- Detect heterogeneous CPU configurations
- Calculate average/min/max speeds for systems with varying CPU speeds
- Update telemetry output to show CPU model in GitHub issue comments
- Maintain backward compatibility with existing cpu_name field

This provides more specific hardware information for better benchmark analysis.

* Delete lib/LinearSolveAutotune/test/test_cpu_info.jl

Author: ChrisRackauckas

lib/LinearSolveAutotune/src/LinearSolveAutotune.jl

@@ -66,7 +66,13 @@ function Base.show(io::IO, results::AutotuneResults)
 
     # System info summary
     println(io, "\n📊 System Information:")
-    println(io, "  • CPU: ", get(results.sysinfo, "cpu_name", "Unknown"))
+    # Use cpu_model if available, otherwise fall back to cpu_name
+    cpu_display = get(results.sysinfo, "cpu_model", get(results.sysinfo, "cpu_name", "Unknown"))
+    println(io, "  • CPU: ", cpu_display)
+    cpu_speed = get(results.sysinfo, "cpu_speed_mhz", 0)
+    if cpu_speed > 0
+        println(io, "  • Speed: ", cpu_speed, " MHz")
+    end
     println(io, "  • OS: ", get(results.sysinfo, "os_name", "Unknown"), " (", get(results.sysinfo, "os", "Unknown"), ")")
     println(io, "  • Julia: ", get(results.sysinfo, "julia_version", "Unknown"))
     println(io, "  • Threads: ", get(results.sysinfo, "num_threads", "Unknown"), " (BLAS: ", get(results.sysinfo, "blas_num_threads", "Unknown"), ")")

lib/LinearSolveAutotune/src/gpu_detection.jl

@@ -2,6 +2,7 @@
 
 using CPUSummary
 using Pkg
+using Statistics: mean
 
 """
     is_cuda_available()
@@ -82,11 +83,32 @@ function get_system_info()
     info["os_name"] = Sys.iswindows() ? "Windows" : Sys.islinux() ? "Linux" : Sys.isapple() ? "macOS" : "Other"
     info["arch"] = string(Sys.ARCH)
 
-    # Use CPUSummary where available, fallback to Sys otherwise
+    # Get detailed CPU information from Sys.cpu_info()
+    cpu_info = Sys.cpu_info()
+    if !isempty(cpu_info)
+        first_cpu = cpu_info[1]
+        info["cpu_model"] = first_cpu.model
+        info["cpu_speed_mhz"] = first_cpu.speed
+        
+        # Count unique CPU models (for heterogeneous systems)
+        cpu_models = unique([cpu.model for cpu in cpu_info])
+        if length(cpu_models) > 1
+            info["cpu_models"] = join(cpu_models, ", ")
+            info["heterogeneous_cpus"] = true
+        else
+            info["heterogeneous_cpus"] = false
+        end
+    else
+        info["cpu_model"] = "Unknown"
+        info["cpu_speed_mhz"] = 0
+    end
+    
+    # Legacy CPU name for backward compatibility
     try
         info["cpu_name"] = string(Sys.CPU_NAME)
     catch
-        info["cpu_name"] = "Unknown"
+        # Fallback to cpu_model if CPU_NAME not available
+        info["cpu_name"] = get(info, "cpu_model", "Unknown")
     end
 
     # CPUSummary.num_cores() returns the physical cores (as Static.StaticInt)
@@ -295,11 +317,45 @@ function get_detailed_system_info()
         system_data["machine"] = "unknown"
     end
 
-    # CPU details
+    # CPU details from Sys.cpu_info()
+    try
+        cpu_info = Sys.cpu_info()
+        if !isempty(cpu_info)
+            first_cpu = cpu_info[1]
+            system_data["cpu_model"] = first_cpu.model
+            system_data["cpu_speed_mhz"] = first_cpu.speed
+            
+            # Check for heterogeneous CPUs
+            cpu_models = unique([cpu.model for cpu in cpu_info])
+            if length(cpu_models) > 1
+                system_data["cpu_models"] = join(cpu_models, ", ")
+                system_data["heterogeneous_cpus"] = true
+            else
+                system_data["heterogeneous_cpus"] = false
+            end
+            
+            # Calculate average CPU speed if speeds vary
+            cpu_speeds = [cpu.speed for cpu in cpu_info]
+            if length(unique(cpu_speeds)) > 1
+                system_data["cpu_speed_avg_mhz"] = round(mean(cpu_speeds), digits=0)
+                system_data["cpu_speed_min_mhz"] = minimum(cpu_speeds)
+                system_data["cpu_speed_max_mhz"] = maximum(cpu_speeds)
+            end
+        else
+            system_data["cpu_model"] = "unknown"
+            system_data["cpu_speed_mhz"] = 0
+        end
+    catch
+        system_data["cpu_model"] = "unknown"
+        system_data["cpu_speed_mhz"] = 0
+    end
+    
+    # Legacy CPU name for backward compatibility
     try
         system_data["cpu_name"] = string(Sys.CPU_NAME)
     catch
-        system_data["cpu_name"] = "unknown"
+        # Fallback to cpu_model if available
+        system_data["cpu_name"] = get(system_data, "cpu_model", "unknown")
     end
 
     try

lib/LinearSolveAutotune/src/telemetry.jl

@@ -206,7 +206,24 @@ function format_system_info_markdown(system_info::Dict)
     push!(lines, "- **OS**: $os_display ($os_kernel)")
     # Handle both "arch" and "architecture" keys
     push!(lines, "- **Architecture**: $(get(system_info, "architecture", get(system_info, "arch", "unknown")))")
-    push!(lines, "- **CPU**: $(get(system_info, "cpu_name", "unknown"))")
+    
+    # Enhanced CPU information
+    cpu_model = get(system_info, "cpu_model", nothing)
+    if cpu_model !== nothing && cpu_model != "unknown"
+        push!(lines, "- **CPU Model**: $cpu_model")
+        cpu_speed = get(system_info, "cpu_speed_mhz", 0)
+        if cpu_speed > 0
+            push!(lines, "- **CPU Speed**: $(cpu_speed) MHz")
+        end
+        # Show if heterogeneous CPUs detected
+        if get(system_info, "heterogeneous_cpus", false)
+            push!(lines, "- **CPU Models**: $(get(system_info, "cpu_models", ""))")
+        end
+    else
+        # Fallback to legacy CPU name
+        push!(lines, "- **CPU**: $(get(system_info, "cpu_name", "unknown"))")
+    end
+    
     # Handle both "num_cores" and "cpu_cores" keys
     push!(lines, "- **Cores**: $(get(system_info, "cpu_cores", get(system_info, "num_cores", "unknown")))")
     # Handle both "num_threads" and "julia_threads" keys
@@ -416,20 +433,20 @@ function upload_to_github(content::String, plot_files, auth_info::Tuple,
         target_repo = "SciML/LinearSolve.jl"
         issue_number = 669  # The existing issue for collecting autotune results
 
-        # Construct comment body
-        cpu_name = get(system_info, "cpu_name", "unknown")
+        # Construct comment body - use cpu_model if available for more specific info
+        cpu_display = get(system_info, "cpu_model", get(system_info, "cpu_name", "unknown"))
         os_name = get(system_info, "os", "unknown")
         timestamp = Dates.format(Dates.now(), "yyyy-mm-dd HH:MM")
 
         comment_body = """
-        ## Benchmark Results: $cpu_name on $os_name ($timestamp)
+        ## Benchmark Results: $cpu_display on $os_name ($timestamp)
         
         $content
 
         ---
 
         ### System Summary
-        - **CPU:** $cpu_name
+        - **CPU:** $cpu_display
         - **OS:** $os_name  
         - **Timestamp:** $timestamp