[CI] Set workspace to be per executor (#4336)

Jenkinsfile

@@ -64,7 +64,7 @@ docker_run = 'docker/bash.sh'
 // timeout in minutes
 max_time = 120
 
-workspace = 'workspace/exec_${EXECUTOR_NUMBER}'
+workspace = "workspace/exec_${env.EXECUTOR_NUMBER}"
 
 // initialize source codes
 def init_git() {
@@ -88,7 +88,7 @@ def init_git_win() {
 stage("Sanity Check") {
   timeout(time: max_time, unit: 'MINUTES') {
     node('CPU') {
-      ws('${workspace}/tvm/sanity') {
+      ws("${workspace}/tvm/sanity") {
         init_git()
         sh "${docker_run} ${ci_lint}  ./tests/scripts/task_lint.sh"
       }
@@ -136,7 +136,7 @@ def unpack_lib(name, libs) {
 stage('Build') {
   parallel 'BUILD: GPU': {
     node('GPUBUILD') {
-      ws('${workspace}/tvm/build-gpu') {
+      ws("${workspace}/tvm/build-gpu") {
         init_git()
         sh """
            mkdir -p build
@@ -184,7 +184,7 @@ stage('Build') {
   },
   'BUILD: CPU': {
     node('CPU') {
-      ws('${workspace}/tvm/build-cpu') {
+      ws("${workspace}/tvm/build-cpu") {
         init_git()
         sh """
            mkdir -p build
@@ -216,7 +216,7 @@ stage('Build') {
   },
   'BUILD : i386': {
     node('CPU') {
-      ws('${workspace}/tvm/build-i386') {
+      ws("${workspace}/tvm/build-i386") {
         init_git()
         sh """
            mkdir -p build
@@ -241,7 +241,7 @@ stage('Build') {
 stage('Unit Test') {
   parallel 'python3: GPU': {
     node('TensorCore') {
-      ws('${workspace}/tvm/ut-python-gpu') {
+      ws("${workspace}/tvm/ut-python-gpu") {
         init_git()
         unpack_lib('gpu', tvm_multilib)
         timeout(time: max_time, unit: 'MINUTES') {
@@ -253,7 +253,7 @@ stage('Unit Test') {
   },
   'python3: i386': {
     node('CPU') {
-      ws('${workspace}/tvm/ut-python-i386') {
+      ws("${workspace}/tvm/ut-python-i386") {
         init_git()
         unpack_lib('i386', tvm_multilib)
         timeout(time: max_time, unit: 'MINUTES') {
@@ -266,7 +266,7 @@ stage('Unit Test') {
   },
   'java: GPU': {
     node('GPU') {
-      ws('${workspace}/tvm/ut-java') {
+      ws("${workspace}/tvm/ut-java") {
         init_git()
         unpack_lib('gpu', tvm_multilib)
         timeout(time: max_time, unit: 'MINUTES') {
@@ -280,7 +280,7 @@ stage('Unit Test') {
 stage('Integration Test') {
   parallel 'topi: GPU': {
     node('GPU') {
-      ws('${workspace}/tvm/topi-python-gpu') {
+      ws("${workspace}/tvm/topi-python-gpu") {
         init_git()
         unpack_lib('gpu', tvm_multilib)
         timeout(time: max_time, unit: 'MINUTES') {
@@ -291,7 +291,7 @@ stage('Integration Test') {
   },
   'frontend: GPU': {
     node('GPU') {
-      ws('${workspace}/tvm/frontend-python-gpu') {
+      ws("${workspace}/tvm/frontend-python-gpu") {
         init_git()
         unpack_lib('gpu', tvm_multilib)
         timeout(time: max_time, unit: 'MINUTES') {
@@ -302,7 +302,7 @@ stage('Integration Test') {
   },
   'legacy: GPU': {
     node('GPU') {
-      ws('${workspace}/tvm/legacy-python-gpu') {
+      ws("${workspace}/tvm/legacy-python-gpu") {
         init_git()
         unpack_lib('gpu', tvm_multilib)
         timeout(time: max_time, unit: 'MINUTES') {
@@ -313,7 +313,7 @@ stage('Integration Test') {
   },
   'docs: GPU': {
     node('GPU') {
-      ws('${workspace}/tvm/docs-python-gpu') {
+      ws("${workspace}/tvm/docs-python-gpu") {
         init_git()
         unpack_lib('gpu', tvm_multilib)
         timeout(time: max_time, unit: 'MINUTES') {
@@ -345,7 +345,7 @@ stage('Build packages') {
 
 stage('Deploy') {
     node('doc') {
-      ws('${workspace}/tvm/deploy-docs') {
+      ws("${workspace}/tvm/deploy-docs") {
         if (env.BRANCH_NAME == "master") {
            unpack_lib('mydocs', 'docs.tgz')
            sh "tar xf docs.tgz -C /var/docs"