optimize coreIndex enumeration

tjk213 · Explorer09 · tjk213 · commit d515e2e64dfe · 2026-04-05T18:37:08.000-04:00
Co-authored-by: Kang-Che Sung (宋岡哲) &lt;Explorer09@gmail.com&gt;
diff --git a/linux/LinuxMachine.c b/linux/LinuxMachine.c
@@ -739,13 +739,12 @@ static void LinuxMachine_computeThreadIndices(LinuxMachine* this) {
       because CoreIDs are not contiguous or because cpus are
       enumerated in an alternative order, or both. */
    for (size_t i = 1; i <= super->existingCPUs; i++) {
-      int coreIndex = 0;
-      for (size_t j = 1; j < i; j++) {
+      for (size_t j = i - 1; j >= 1; j--) {
          if (cpus[i].threadIndex == cpus[j].threadIndex) {
-            coreIndex++;
+            cpus[i].coreIndex = cpus[j].coreIndex + 1;
+            break;
          }
       }
-      cpus[i].coreIndex = coreIndex;
    }
 
    /* Set core & thread indices to zero for cpu0 (average) */

Original file line number	Diff line number	Diff line change
`@@ -739,13 +739,12 @@ static void LinuxMachine_computeThreadIndices(LinuxMachine* this) {`
`739`	`739`	`because CoreIDs are not contiguous or because cpus are`
`740`	`740`	`enumerated in an alternative order, or both. */`
`741`	`741`	`for (size_t i = 1; i <= super->existingCPUs; i++) {`
`742`		`- int coreIndex = 0;`
`743`		`- for (size_t j = 1; j < i; j++) {`
	`742`	`+ for (size_t j = i - 1; j >= 1; j--) {`
`744`	`743`	`if (cpus[i].threadIndex == cpus[j].threadIndex) {`
`745`		`- coreIndex++;`
	`744`	`+ cpus[i].coreIndex = cpus[j].coreIndex + 1;`
	`745`	`+ break;`
`746`	`746`	`}`
`747`	`747`	`}`
`748`		`- cpus[i].coreIndex = coreIndex;`
`749`	`748`	`}`
`750`	`749`
`751`	`750`	`/* Set core & thread indices to zero for cpu0 (average) */`