From 69ae4e10910f9f329fd175535a6cb16ce72dc395 Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sat, 18 Jul 2026 03:10:48 -0700
Subject: [PATCH 01/16] Cycle locations.

---
 azure-devops/create-1es-hosted-pool.ps1 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/azure-devops/create-1es-hosted-pool.ps1 b/azure-devops/create-1es-hosted-pool.ps1
index 037a33ea65..06325f7284 100644
--- a/azure-devops/create-1es-hosted-pool.ps1
+++ b/azure-devops/create-1es-hosted-pool.ps1
@@ -47,7 +47,7 @@ if ($VMSku -ieq 'Fasv6') {
   $AvailableLocations = @('australiaeast', 'southcentralus')
 }
 
-$AvailableLocationIdx = 11 # Increment for each new set of pools, to cycle through the available locations.
+$AvailableLocationIdx = 12 # Increment for each new set of pools, to cycle through the available locations.
 $Location = $AvailableLocations[$AvailableLocationIdx % $AvailableLocations.Length]
 
 if ($Arch -ieq 'x64') {

From 9ec80419c3a4b45c80f7ad9165b0e389f0caf0e7 Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sat, 18 Jul 2026 03:17:48 -0700
Subject: [PATCH 02/16] Got quota for 2048 cores of Fadsv7 in australiaeast.

---
 azure-devops/create-1es-hosted-pool.ps1 | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/azure-devops/create-1es-hosted-pool.ps1 b/azure-devops/create-1es-hosted-pool.ps1
index 06325f7284..e2a9f29419 100644
--- a/azure-devops/create-1es-hosted-pool.ps1
+++ b/azure-devops/create-1es-hosted-pool.ps1
@@ -9,11 +9,11 @@ Creates a 1ES Hosted Pool, set up for the STL's CI.
 See https://github.com/microsoft/STL/wiki/Checklist-for-Toolset-Updates for more information.
 
 .PARAMETER VMSku
-The VM SKU can be Fasv6, Fasv7, or Dpdsv6.
+The VM SKU can be Fasv6, Fasv7, Fadsv7, or Dpdsv6.
 #>
 [CmdletBinding(PositionalBinding=$false)]
 Param(
-  [Parameter(Mandatory)][ValidateSet('Fasv6', 'Fasv7', 'Dpdsv6')][String]$VMSku
+  [Parameter(Mandatory)][ValidateSet('Fasv6', 'Fasv7', 'Fadsv7', 'Dpdsv6')][String]$VMSku
 )
 
 $ErrorActionPreference = 'Stop'
@@ -27,6 +27,7 @@ $Timestamp = $CurrentDate.ToString('yyyy-MM-ddTHHmm')
 # | Fasv7  | australiaeast  |   740 |                    |
 # | Fasv7  | northeurope    |   640 |                    |
 # | Fasv7  | southeastasia  |   640 |                    |
+# | Fadsv7 | australiaeast  |  2048 |                    |
 # | Dpdsv6 | australiaeast  |  2048 |                    |
 # | Dpdsv6 | southcentralus |  2048 |                    |
 
@@ -40,6 +41,11 @@ if ($VMSku -ieq 'Fasv6') {
   $VMSize = 'Standard_F32as_v7'
   $PoolSize = 20 # Locations where we have quota for at least 640 cores (20 VMs):
   $AvailableLocations = @('australiaeast', 'northeurope', 'southeastasia')
+} elseif ($VMSku -ieq 'Fadsv7') {
+  $Arch = 'x64'
+  $VMSize = 'Standard_F32ads_v7'
+  $PoolSize = 32 # We have quota for 2048 cores (64 VMs), so we can have old and new pools of 32 VMs each.
+  $AvailableLocations = @('australiaeast')
 } elseif ($VMSku -ieq 'Dpdsv6') {
   $Arch = 'arm64'
   $VMSize = 'Standard_D32pds_v6'

From 20af2dbef22c06b5239bf61114f7c0d62f4e04aa Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sat, 18 Jul 2026 05:11:01 -0700
Subject: [PATCH 03/16] Change 6 initial stages to use a Medium pool.

Test_x86, Test_x64_ASan, Test_x86_ASan remain Slow.

Test_x64 remains Fast.
---
 azure-pipelines.yml | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 9edfc85a9b..c50e0222e9 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -14,7 +14,7 @@ stages:
     dependsOn: []
     displayName: 'Code Format'
     pool:
-      name: ${{ variables.x64SlowPoolName }}
+      name: ${{ variables.x64MediumPoolName }}
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
@@ -27,7 +27,7 @@ stages:
     dependsOn: []
     displayName: 'Build x64'
     pool:
-      name: ${{ variables.x64SlowPoolName }}
+      name: ${{ variables.x64MediumPoolName }}
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
@@ -49,7 +49,7 @@ stages:
     dependsOn: []
     displayName: 'Build x86'
     pool:
-      name: ${{ variables.x64SlowPoolName }}
+      name: ${{ variables.x64MediumPoolName }}
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
@@ -71,7 +71,7 @@ stages:
     dependsOn: []
     displayName: 'Build ARM64 (Cross)'
     pool:
-      name: ${{ variables.x64SlowPoolName }}
+      name: ${{ variables.x64MediumPoolName }}
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
@@ -93,7 +93,7 @@ stages:
     dependsOn: []
     displayName: 'Build ARM64EC (Cross)'
     pool:
-      name: ${{ variables.x64SlowPoolName }}
+      name: ${{ variables.x64MediumPoolName }}
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
@@ -139,7 +139,7 @@ stages:
     dependsOn: []
     displayName: 'Configure Tests'
     pool:
-      name: ${{ variables.x64SlowPoolName }}
+      name: ${{ variables.x64MediumPoolName }}
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot

From 1bda442ebe318ac42c086063d25c52054785dc94 Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sat, 18 Jul 2026 05:17:08 -0700
Subject: [PATCH 04/16] Split work root usage into Slow/Medium/Fast.

---
 azure-devops/asan-pipeline.yml |  4 ++--
 azure-pipelines.yml            | 16 ++++++++--------
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/azure-devops/asan-pipeline.yml b/azure-devops/asan-pipeline.yml
index 4879cc48d4..985520ff41 100644
--- a/azure-devops/asan-pipeline.yml
+++ b/azure-devops/asan-pipeline.yml
@@ -24,7 +24,7 @@ stages:
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
-      value: '$(x64PoolWorkRoot)'
+      value: '$(x64SlowPoolWorkRoot)'
       readonly: true
     jobs:
       - template: build-and-test.yml
@@ -43,7 +43,7 @@ stages:
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
-      value: '$(x64PoolWorkRoot)'
+      value: '$(x64SlowPoolWorkRoot)'
       readonly: true
     jobs:
       - template: build-and-test.yml
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index c50e0222e9..8a2509bb66 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -18,7 +18,7 @@ stages:
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
-      value: '$(x64PoolWorkRoot)'
+      value: '$(x64MediumPoolWorkRoot)'
       readonly: true
     jobs:
       - template: azure-devops/format-validation.yml
@@ -31,7 +31,7 @@ stages:
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
-      value: '$(x64PoolWorkRoot)'
+      value: '$(x64MediumPoolWorkRoot)'
       readonly: true
     jobs:
       - template: azure-devops/build-and-test.yml
@@ -53,7 +53,7 @@ stages:
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
-      value: '$(x64PoolWorkRoot)'
+      value: '$(x64MediumPoolWorkRoot)'
       readonly: true
     jobs:
       - template: azure-devops/build-and-test.yml
@@ -75,7 +75,7 @@ stages:
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
-      value: '$(x64PoolWorkRoot)'
+      value: '$(x64MediumPoolWorkRoot)'
       readonly: true
     jobs:
       - template: azure-devops/build-and-test.yml
@@ -97,7 +97,7 @@ stages:
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
-      value: '$(x64PoolWorkRoot)'
+      value: '$(x64MediumPoolWorkRoot)'
       readonly: true
     jobs:
       - template: azure-devops/build-and-test.yml
@@ -143,7 +143,7 @@ stages:
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
-      value: '$(x64PoolWorkRoot)'
+      value: '$(x64MediumPoolWorkRoot)'
       readonly: true
     jobs:
       - template: azure-devops/build-and-test.yml
@@ -169,7 +169,7 @@ stages:
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
-      value: '$(x64PoolWorkRoot)'
+      value: '$(x64FastPoolWorkRoot)'
       readonly: true
     jobs:
       - template: azure-devops/build-and-test.yml
@@ -186,7 +186,7 @@ stages:
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
-      value: '$(x64PoolWorkRoot)'
+      value: '$(x64SlowPoolWorkRoot)'
       readonly: true
     jobs:
       - template: azure-devops/build-and-test.yml

From ed560550daf788bf922e009c394b5a3af6b59f59 Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sat, 18 Jul 2026 05:19:37 -0700
Subject: [PATCH 05/16] Split pools and work roots into Slow/Medium/Fast.

---
 azure-devops/config.yml | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/azure-devops/config.yml b/azure-devops/config.yml
index 4cce273f81..910463db16 100644
--- a/azure-devops/config.yml
+++ b/azure-devops/config.yml
@@ -5,13 +5,16 @@
 
 variables:
 - name: x64SlowPoolName
-  value: 'Stl-2026-07-15T0800-x64-Fasv6-Pool'
+  value: 'Stl-FIXME-x64-Fasv6-Pool'
+  readonly: true
+- name: x64MediumPoolName
+  value: 'Stl-FIXME-x64-Fasv7-Pool'
   readonly: true
 - name: x64FastPoolName
-  value: 'Stl-2026-07-15T0800-x64-Fasv7-Pool'
+  value: 'Stl-FIXME-x64-Fadsv7-Pool'
   readonly: true
 - name: arm64PoolName
-  value: 'Stl-2026-07-15T0800-arm64-Dpdsv6-Pool'
+  value: 'Stl-FIXME-arm64-Dpdsv6-Pool'
   readonly: true
 - name: poolDemands
   value: 'EnableSpotVM -equals false'
@@ -19,11 +22,18 @@ variables:
 - name: launchVsDevShell
   value: 'C:\Program Files\Microsoft Visual Studio\18\Insiders\Common7\Tools\Launch-VsDevShell.ps1'
   readonly: true
-# The x64 SKUs Fasv6 and Fasv7 don't have local temporary storage, so they must use 'C:'.
-# When we can use Fadsv7, local temporary storage should be available as 'N:'.
-- name: x64PoolWorkRoot
+# The x64 SKU Fasv6 doesn't have local temporary storage, so it must use 'C:'.
+- name: x64SlowPoolWorkRoot
+  value: 'C:'
+  readonly: true
+# The x64 SKU Fasv7 doesn't have local temporary storage, so it must use 'C:'.
+- name: x64MediumPoolWorkRoot
   value: 'C:'
   readonly: true
+# The x64 SKU Fadsv7 has local temporary storage, available as 'N:' (for NVMe).
+- name: x64FastPoolWorkRoot
+  value: 'N:'
+  readonly: true
 # The arm64 SKU Dpdsv6 has local temporary storage, available as 'E:'.
 - name: arm64PoolWorkRoot
   value: 'E:'

From 90ed570a77c4d3468a4d5e59876fe0f3996b29cc Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sat, 18 Jul 2026 07:33:15 -0700
Subject: [PATCH 06/16] Move Test_x86 down, no other changes.

---
 azure-pipelines.yml | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 8a2509bb66..a526ecd336 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -178,23 +178,6 @@ stages:
           targetArch: x64
           targetPlatform: x64
 
-  - stage: Test_x86
-    dependsOn: Test_x64
-    displayName: 'Test x86'
-    pool:
-      name: ${{ variables.x64SlowPoolName }}
-      demands: ${{ variables.poolDemands }}
-    variables:
-    - name: workRoot
-      value: '$(x64SlowPoolWorkRoot)'
-      readonly: true
-    jobs:
-      - template: azure-devops/build-and-test.yml
-        parameters:
-          hostArch: x86
-          targetArch: x86
-          targetPlatform: x86
-
   - stage: Test_ARM64
     dependsOn:
       - Build_ARM64_Native
@@ -214,6 +197,23 @@ stages:
           targetArch: arm64
           targetPlatform: arm64
 
+  - stage: Test_x86
+    dependsOn: Test_x64
+    displayName: 'Test x86'
+    pool:
+      name: ${{ variables.x64SlowPoolName }}
+      demands: ${{ variables.poolDemands }}
+    variables:
+    - name: workRoot
+      value: '$(x64SlowPoolWorkRoot)'
+      readonly: true
+    jobs:
+      - template: azure-devops/build-and-test.yml
+        parameters:
+          hostArch: x86
+          targetArch: x86
+          targetPlatform: x86
+
   - stage: Test_ARM64EC
     dependsOn:
       - Build_ARM64_Native

From 8113d26a5940c9be06b1e45a353ce20f41469314 Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sat, 18 Jul 2026 07:46:40 -0700
Subject: [PATCH 07/16] Move Build_ARM64EC_Cross down, no other changes.

---
 azure-pipelines.yml | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index a526ecd336..a86b84623e 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -89,46 +89,46 @@ stages:
           configureTesting: false
           runTesting: false
 
-  - stage: Build_ARM64EC_Cross
+  # This ARM64-native build will detect problems with the ARM64 pool as early as possible.
+  # The stage dependencies are structured to optimize the critical path.
+  - stage: Build_ARM64_Native
     dependsOn: []
-    displayName: 'Build ARM64EC (Cross)'
+    displayName: 'Build ARM64 (Native)'
     pool:
-      name: ${{ variables.x64MediumPoolName }}
+      name: ${{ variables.arm64PoolName }}
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
-      value: '$(x64MediumPoolWorkRoot)'
+      value: '$(arm64PoolWorkRoot)'
       readonly: true
     jobs:
       - template: azure-devops/build-and-test.yml
         parameters:
-          hostArch: x64
+          hostArch: arm64
           targetArch: arm64
-          targetPlatform: arm64ec
+          targetPlatform: arm64
           analyzeBuild: true
           buildBenchmarks: true
           numShards: 1
           configureTesting: false
           runTesting: false
 
-  # This ARM64-native build will detect problems with the ARM64 pool as early as possible.
-  # The stage dependencies are structured to optimize the critical path.
-  - stage: Build_ARM64_Native
+  - stage: Build_ARM64EC_Cross
     dependsOn: []
-    displayName: 'Build ARM64 (Native)'
+    displayName: 'Build ARM64EC (Cross)'
     pool:
-      name: ${{ variables.arm64PoolName }}
+      name: ${{ variables.x64MediumPoolName }}
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
-      value: '$(arm64PoolWorkRoot)'
+      value: '$(x64MediumPoolWorkRoot)'
       readonly: true
     jobs:
       - template: azure-devops/build-and-test.yml
         parameters:
-          hostArch: arm64
+          hostArch: x64
           targetArch: arm64
-          targetPlatform: arm64
+          targetPlatform: arm64ec
           analyzeBuild: true
           buildBenchmarks: true
           numShards: 1

From 0feee081cb03171e9e3fd820858c0ab9d00c5a66 Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sat, 18 Jul 2026 07:48:23 -0700
Subject: [PATCH 08/16] Add Phase 1/2/3 comments.

---
 azure-pipelines.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index a86b84623e..fdb37a5a0b 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -10,6 +10,7 @@ pr:
   drafts: false
 
 stages:
+##### Phase 1: Initial Builds #####
   - stage: Code_Format
     dependsOn: []
     displayName: 'Code Format'
@@ -155,6 +156,7 @@ stages:
           buildStl: false
           runTesting: false
 
+##### Phase 2: Primary Test Architectures #####
   - stage: Test_x64
     dependsOn:
       - Code_Format
@@ -197,6 +199,7 @@ stages:
           targetArch: arm64
           targetPlatform: arm64
 
+##### Phase 3: Secondary Test Architectures #####
   - stage: Test_x86
     dependsOn: Test_x64
     displayName: 'Test x86'

From c9e03d392be131115d454494fc5fe79210a8210a Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sat, 18 Jul 2026 07:56:17 -0700
Subject: [PATCH 09/16] Drop Build_ARM64_Cross.

---
 azure-pipelines.yml | 22 ----------------------
 1 file changed, 22 deletions(-)

diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index fdb37a5a0b..2cf9c3ecc7 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -68,28 +68,6 @@ stages:
           configureTesting: false
           runTesting: false
 
-  - stage: Build_ARM64_Cross
-    dependsOn: []
-    displayName: 'Build ARM64 (Cross)'
-    pool:
-      name: ${{ variables.x64MediumPoolName }}
-      demands: ${{ variables.poolDemands }}
-    variables:
-    - name: workRoot
-      value: '$(x64MediumPoolWorkRoot)'
-      readonly: true
-    jobs:
-      - template: azure-devops/build-and-test.yml
-        parameters:
-          hostArch: x64
-          targetArch: arm64
-          targetPlatform: arm64
-          analyzeBuild: true
-          buildBenchmarks: true
-          numShards: 1
-          configureTesting: false
-          runTesting: false
-
   # This ARM64-native build will detect problems with the ARM64 pool as early as possible.
   # The stage dependencies are structured to optimize the critical path.
   - stage: Build_ARM64_Native

From aad2c8e2e746bac25d64c3f22fff633837154210 Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sat, 18 Jul 2026 07:56:50 -0700
Subject: [PATCH 10/16] Rename Build_ARM64_Native => Build_ARM64, drop outdated
 comments.

---
 azure-pipelines.yml | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 2cf9c3ecc7..207ade5a0d 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -68,11 +68,9 @@ stages:
           configureTesting: false
           runTesting: false
 
-  # This ARM64-native build will detect problems with the ARM64 pool as early as possible.
-  # The stage dependencies are structured to optimize the critical path.
-  - stage: Build_ARM64_Native
+  - stage: Build_ARM64
     dependsOn: []
-    displayName: 'Build ARM64 (Native)'
+    displayName: 'Build ARM64'
     pool:
       name: ${{ variables.arm64PoolName }}
       demands: ${{ variables.poolDemands }}

From eaa27ffc3cc47e386a5e96a8d67767bda98f1a2d Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sat, 18 Jul 2026 07:58:32 -0700
Subject: [PATCH 11/16] Change Build_ARM64EC_Cross to be native, now named
 Build_ARM64EC.

---
 azure-pipelines.yml | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 207ade5a0d..1e4c36e44b 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -90,20 +90,20 @@ stages:
           configureTesting: false
           runTesting: false
 
-  - stage: Build_ARM64EC_Cross
+  - stage: Build_ARM64EC
     dependsOn: []
-    displayName: 'Build ARM64EC (Cross)'
+    displayName: 'Build ARM64EC'
     pool:
-      name: ${{ variables.x64MediumPoolName }}
+      name: ${{ variables.arm64PoolName }}
       demands: ${{ variables.poolDemands }}
     variables:
     - name: workRoot
-      value: '$(x64MediumPoolWorkRoot)'
+      value: '$(arm64PoolWorkRoot)'
       readonly: true
     jobs:
       - template: azure-devops/build-and-test.yml
         parameters:
-          hostArch: x64
+          hostArch: arm64
           targetArch: arm64
           targetPlatform: arm64ec
           analyzeBuild: true

From 27792aca0d6dade241ad0f551982633231d79690 Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sat, 18 Jul 2026 08:03:14 -0700
Subject: [PATCH 12/16] Change dependencies to actually implement the phase
 structure.

---
 azure-pipelines.yml | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 1e4c36e44b..1979b1b2cd 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -138,8 +138,8 @@ stages:
       - Code_Format
       - Build_x64
       - Build_x86
-      - Build_ARM64_Cross
-      - Build_ARM64EC_Cross
+      - Build_ARM64
+      - Build_ARM64EC
       - Configure_Tests
     displayName: 'Test x64'
     pool:
@@ -158,8 +158,12 @@ stages:
 
   - stage: Test_ARM64
     dependsOn:
-      - Build_ARM64_Native
-      - Test_x64
+      - Code_Format
+      - Build_x64
+      - Build_x86
+      - Build_ARM64
+      - Build_ARM64EC
+      - Configure_Tests
     displayName: 'Test ARM64'
     pool:
       name: ${{ variables.arm64PoolName }}
@@ -177,7 +181,9 @@ stages:
 
 ##### Phase 3: Secondary Test Architectures #####
   - stage: Test_x86
-    dependsOn: Test_x64
+    dependsOn:
+      - Test_x64
+      - Test_ARM64
     displayName: 'Test x86'
     pool:
       name: ${{ variables.x64SlowPoolName }}
@@ -195,8 +201,8 @@ stages:
 
   - stage: Test_ARM64EC
     dependsOn:
-      - Build_ARM64_Native
       - Test_x64
+      - Test_ARM64
     displayName: 'Test ARM64EC'
     pool:
       name: ${{ variables.arm64PoolName }}

From 8843bb4cb3055837fe7e092c5c585710326881d4 Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sat, 18 Jul 2026 08:23:39 -0700
Subject: [PATCH 13/16] Adjust VM/pool sizes.

Slow pool: 32 VMs, each 64-core. We use 10 VMs in Phase 3 to test x86, so this gives us throughput for 3 PRs.

Medium pool: 13 VMs, each 48-core. We use 4 VMs in Phase 1, so this gives us throughput for 3 PRs. (Phase 1 is very fast, so the throughput is really higher.)

Fast pool: 21 VMs, each 48-core. We use 10 VMs in Phase 2 to test x64, so this gives us throughput for 2 PRs.

ARM64 pool: 32 VMs, each 64-core. We use at most 10 VMs simultaneously (2 in Phase 1, 10 in Phase 2, 10 in Phase 3), so this gives us throughput for 3 PRs.
---
 azure-devops/create-1es-hosted-pool.ps1 | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/azure-devops/create-1es-hosted-pool.ps1 b/azure-devops/create-1es-hosted-pool.ps1
index e2a9f29419..e625922350 100644
--- a/azure-devops/create-1es-hosted-pool.ps1
+++ b/azure-devops/create-1es-hosted-pool.ps1
@@ -33,23 +33,23 @@ $Timestamp = $CurrentDate.ToString('yyyy-MM-ddTHHmm')
 
 if ($VMSku -ieq 'Fasv6') {
   $Arch = 'x64'
-  $VMSize = 'Standard_F32as_v6'
-  $PoolSize = 64 # We have quota for 4096 cores (128 VMs), so we can have old and new pools of 64 VMs each.
+  $VMSize = 'Standard_F64as_v6'
+  $PoolSize = 32 # We have quota for 4096 cores (64 VMs), so we can have old and new pools of 32 VMs each.
   $AvailableLocations = @('eastus2')
 } elseif ($VMSku -ieq 'Fasv7') {
   $Arch = 'x64'
-  $VMSize = 'Standard_F32as_v7'
-  $PoolSize = 20 # Locations where we have quota for at least 640 cores (20 VMs):
+  $VMSize = 'Standard_F48as_v7'
+  $PoolSize = 13 # Locations where we have quota for at least 640 cores (13 VMs):
   $AvailableLocations = @('australiaeast', 'northeurope', 'southeastasia')
 } elseif ($VMSku -ieq 'Fadsv7') {
   $Arch = 'x64'
-  $VMSize = 'Standard_F32ads_v7'
-  $PoolSize = 32 # We have quota for 2048 cores (64 VMs), so we can have old and new pools of 32 VMs each.
+  $VMSize = 'Standard_F48ads_v7'
+  $PoolSize = 21 # We have quota for 2048 cores (42 VMs), so we can have old and new pools of 21 VMs each.
   $AvailableLocations = @('australiaeast')
 } elseif ($VMSku -ieq 'Dpdsv6') {
   $Arch = 'arm64'
-  $VMSize = 'Standard_D32pds_v6'
-  $PoolSize = 64 # Locations where we have quota for at least 2048 cores (64 VMs):
+  $VMSize = 'Standard_D64pds_v6'
+  $PoolSize = 32 # Locations where we have quota for at least 2048 cores (32 VMs):
   $AvailableLocations = @('australiaeast', 'southcentralus')
 }
 

From f613ff1041c3d1014d743ba2ffc88146a59adcaa Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sat, 18 Jul 2026 09:04:43 -0700
Subject: [PATCH 14/16] Split $VMSize into $ProtoVMSize (16-core) and
 $PoolSkuName (48-core or 64-core).

This will make it obvious if resizing works. 16 cores should be plenty for image setup.
---
 azure-devops/create-1es-hosted-pool.ps1 | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/azure-devops/create-1es-hosted-pool.ps1 b/azure-devops/create-1es-hosted-pool.ps1
index e625922350..389e46399e 100644
--- a/azure-devops/create-1es-hosted-pool.ps1
+++ b/azure-devops/create-1es-hosted-pool.ps1
@@ -33,22 +33,26 @@ $Timestamp = $CurrentDate.ToString('yyyy-MM-ddTHHmm')
 
 if ($VMSku -ieq 'Fasv6') {
   $Arch = 'x64'
-  $VMSize = 'Standard_F64as_v6'
+  $ProtoVMSize = 'Standard_F16as_v6'
+  $PoolSkuName = 'Standard_F64as_v6'
   $PoolSize = 32 # We have quota for 4096 cores (64 VMs), so we can have old and new pools of 32 VMs each.
   $AvailableLocations = @('eastus2')
 } elseif ($VMSku -ieq 'Fasv7') {
   $Arch = 'x64'
-  $VMSize = 'Standard_F48as_v7'
+  $ProtoVMSize = 'Standard_F16as_v7'
+  $PoolSkuName = 'Standard_F48as_v7'
   $PoolSize = 13 # Locations where we have quota for at least 640 cores (13 VMs):
   $AvailableLocations = @('australiaeast', 'northeurope', 'southeastasia')
 } elseif ($VMSku -ieq 'Fadsv7') {
   $Arch = 'x64'
-  $VMSize = 'Standard_F48ads_v7'
+  $ProtoVMSize = 'Standard_F16ads_v7'
+  $PoolSkuName = 'Standard_F48ads_v7'
   $PoolSize = 21 # We have quota for 2048 cores (42 VMs), so we can have old and new pools of 21 VMs each.
   $AvailableLocations = @('australiaeast')
 } elseif ($VMSku -ieq 'Dpdsv6') {
   $Arch = 'arm64'
-  $VMSize = 'Standard_D64pds_v6'
+  $ProtoVMSize = 'Standard_D16pds_v6'
+  $PoolSkuName = 'Standard_D64pds_v6'
   $PoolSize = 32 # Locations where we have quota for at least 2048 cores (32 VMs):
   $AvailableLocations = @('australiaeast', 'southcentralus')
 }
@@ -219,13 +223,13 @@ Display-ProgressBar -Status 'Creating prototype VM config'
 if ($Arch -ieq 'x64') {
   $VM = New-AzVMConfig `
     -VMName $ProtoVMName `
-    -VMSize $VMSize `
+    -VMSize $ProtoVMSize `
     -DiskControllerType 'NVMe' `
     -Priority 'Regular'
 } else {
   $VM = New-AzVMConfig `
     -VMName $ProtoVMName `
-    -VMSize $VMSize `
+    -VMSize $ProtoVMSize `
     -DiskControllerType 'SCSI' `
     -Priority 'Regular' `
     -SecurityType 'TrustedLaunch' `
@@ -432,7 +436,7 @@ $PoolName = "$ResourceGroupName-Pool"
 $PoolProperties = @{
   'organization' = 'https://dev.azure.com/vclibs'
   'projects' = @('STL')
-  'sku' = @{ 'name' = $VMSize; 'tier' = 'StandardSSD'; 'enableSpot' = $false; }
+  'sku' = @{ 'name' = $PoolSkuName; 'tier' = 'StandardSSD'; 'enableSpot' = $false; }
   'images' = @(@{ 'imageName' = $ImageName; 'poolBufferPercentage' = '100'; })
   'maxPoolSize' = $PoolSize
   'agentProfile' = @{ 'type' = 'Stateless'; }

From 0f5928485e043c4b798d9c5033fe0fd4c44b3a58 Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sun, 19 Jul 2026 06:38:57 -0700
Subject: [PATCH 15/16] Final pools.

---
 azure-devops/config.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/azure-devops/config.yml b/azure-devops/config.yml
index 910463db16..b32d6469d4 100644
--- a/azure-devops/config.yml
+++ b/azure-devops/config.yml
@@ -5,16 +5,16 @@
 
 variables:
 - name: x64SlowPoolName
-  value: 'Stl-FIXME-x64-Fasv6-Pool'
+  value: 'Stl-2026-07-18T1628-x64-Fasv6-Pool'
   readonly: true
 - name: x64MediumPoolName
-  value: 'Stl-FIXME-x64-Fasv7-Pool'
+  value: 'Stl-2026-07-18T1628-x64-Fasv7-Pool'
   readonly: true
 - name: x64FastPoolName
-  value: 'Stl-FIXME-x64-Fadsv7-Pool'
+  value: 'Stl-2026-07-18T1628-x64-Fadsv7-Pool'
   readonly: true
 - name: arm64PoolName
-  value: 'Stl-FIXME-arm64-Dpdsv6-Pool'
+  value: 'Stl-2026-07-18T1628-arm64-Dpdsv6-Pool'
   readonly: true
 - name: poolDemands
   value: 'EnableSpotVM -equals false'

From 0d137b30bdc7d51bdde5a9be1e4bcbc433a65a4f Mon Sep 17 00:00:00 2001
From: "Stephan T. Lavavej" <stl@microsoft.com>
Date: Sun, 19 Jul 2026 07:00:20 -0700
Subject: [PATCH 16/16] Add a comment about 16-core embiggening to 48/64-core,
 and make Notes open-ended.

---
 azure-devops/create-1es-hosted-pool.ps1 | 26 ++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/azure-devops/create-1es-hosted-pool.ps1 b/azure-devops/create-1es-hosted-pool.ps1
index 389e46399e..445e8f318b 100644
--- a/azure-devops/create-1es-hosted-pool.ps1
+++ b/azure-devops/create-1es-hosted-pool.ps1
@@ -21,15 +21,23 @@ $ErrorActionPreference = 'Stop'
 $CurrentDate = Get-Date
 $Timestamp = $CurrentDate.ToString('yyyy-MM-ddTHHmm')
 
-# | SKU    | Location       | Cores | Notes              |
-# |--------|----------------|------:|--------------------|
-# | Fasv6  | eastus2        |  4096 |                    |
-# | Fasv7  | australiaeast  |   740 |                    |
-# | Fasv7  | northeurope    |   640 |                    |
-# | Fasv7  | southeastasia  |   640 |                    |
-# | Fadsv7 | australiaeast  |  2048 |                    |
-# | Dpdsv6 | australiaeast  |  2048 |                    |
-# | Dpdsv6 | southcentralus |  2048 |                    |
+# We use 16 cores for the prototype VM ($ProtoVMSize) because we don't need a ton of cores to run provision-image.ps1,
+# and this allows us to stay below our total regional vCPU quota when running create-1es-hosted-pool.ps1 for several
+# SKUs simultaneously. (Our regional vCPU quota is 100, "enforced across all VM series in a given region" as
+# https://learn.microsoft.com/azure/quotas/regional-quota-requests explains. We're creating individual prototype VMs,
+# outside of the 1ES Hosted Pools we prepare later, so the prototypes are subject to the limit of 100.)
+# As long as everything else matches, we can use the image captured from the prototype VM
+# to create a 1ES Hosted Pool with larger VMs ($PoolSkuName) without any issues.
+
+# | SKU    | Location       | Cores | Notes
+# |--------|----------------|------:|-------
+# | Fasv6  | eastus2        |  4096 |
+# | Fasv7  | australiaeast  |   740 |
+# | Fasv7  | northeurope    |   640 |
+# | Fasv7  | southeastasia  |   640 |
+# | Fadsv7 | australiaeast  |  2048 |
+# | Dpdsv6 | australiaeast  |  2048 |
+# | Dpdsv6 | southcentralus |  2048 |
 
 if ($VMSku -ieq 'Fasv6') {
   $Arch = 'x64'