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update linux-arm to use the asm intrin for freq

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Colin Davidson
2025-07-28 16:32:10 -07:00
parent 76b00c046b
commit 1a9b128bfc
1 changed files with 29 additions and 24 deletions
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core/time/tsc_linux.odin
+5
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@@ -5,6 +5,10 @@ package time
import linux "core:sys/linux" import linux "core:sys/linux"
_get_tsc_frequency :: proc "contextless" () -> (u64, bool) { _get_tsc_frequency :: proc "contextless" () -> (u64, bool) {
if ODIN_ARCH == .arm64 {
freq = u64(intrinsics.arm64_read_cycle_counter_frequency())
return frequency, true
} else {
// Get the file descriptor for the perf mapping // Get the file descriptor for the perf mapping
perf_attr := linux.Perf_Event_Attr{} perf_attr := linux.Perf_Event_Attr{}
perf_attr.size = size_of(perf_attr) perf_attr.size = size_of(perf_attr)
@@ -31,3 +35,4 @@ _get_tsc_frequency :: proc "contextless" () -> (u64, bool) {
frequency := u64((u128(1_000_000_000) << u128(event_page.time_shift)) / u128(event_page.time_mult)) frequency := u64((u128(1_000_000_000) << u128(event_page.time_shift)) / u128(event_page.time_mult))
return frequency, true return frequency, true
} }
}