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block all x86 tsc functions in when block

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This commit is contained in:
Colin Davidson
2023-02-21 06:28:55 -08:00
parent 7322b63991
commit 1fc3a25f47
3 changed files with 50 additions and 44 deletions
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core/time/tsc_darwin.odin
+10 -8
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@@ -9,13 +9,15 @@ foreign libc {
@(link_name="sysctlbyname") _sysctlbyname :: proc(path: cstring, oldp: rawptr, oldlenp: rawptr, newp: rawptr, newlen: int) -> c.int --- @(link_name="sysctlbyname") _sysctlbyname :: proc(path: cstring, oldp: rawptr, oldlenp: rawptr, newp: rawptr, newlen: int) -> c.int ---
} }
_x86_get_tsc_frequency :: proc "contextless" () -> (u64, bool) { when ODIN_ARCH == .amd64 {
tmp_freq : u64 = 0 _x86_get_tsc_frequency :: proc "contextless" () -> (u64, bool) {
tmp_size : i64 = size_of(tmp_freq) tmp_freq : u64 = 0
ret := _sysctlbyname("machdep.tsc.frequency", &tmp_freq, &tmp_size, nil, 0) tmp_size : i64 = size_of(tmp_freq)
if ret < 0 { ret := _sysctlbyname("machdep.tsc.frequency", &tmp_freq, &tmp_size, nil, 0)
return 0, false if ret < 0 {
} return 0, false
}
return tmp_freq, true return tmp_freq, true
}
} }
core/time/tsc_linux.odin
+26 -24
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@@ -5,31 +5,33 @@ package time
import "core:intrinsics" import "core:intrinsics"
import "core:sys/unix" import "core:sys/unix"
_x86_get_tsc_frequency :: proc "contextless" () -> (u64, bool) { when ODIN_ARCH == .amd64 {
perf_attr := unix.Perf_Event_Attr{} _x86_get_tsc_frequency :: proc "contextless" () -> (u64, bool) {
perf_attr.type = u32(unix.Perf_Type_Id.Hardware) perf_attr := unix.Perf_Event_Attr{}
perf_attr.config = u64(unix.Perf_Hardware_Id.Instructions) perf_attr.type = u32(unix.Perf_Type_Id.Hardware)
perf_attr.size = size_of(perf_attr) perf_attr.config = u64(unix.Perf_Hardware_Id.Instructions)
perf_attr.flags = {.Disabled, .Exclude_Kernel, .Exclude_HV} perf_attr.size = size_of(perf_attr)
fd := unix.sys_perf_event_open(&perf_attr, 0, -1, -1, 0) perf_attr.flags = {.Disabled, .Exclude_Kernel, .Exclude_HV}
if fd == -1 { fd := unix.sys_perf_event_open(&perf_attr, 0, -1, -1, 0)
return 0, false if fd == -1 {
} return 0, false
defer unix.sys_close(fd) }
defer unix.sys_close(fd)
page_size : uint = 4096 page_size : uint = 4096
ret := unix.sys_mmap(nil, page_size, unix.PROT_READ, unix.MAP_SHARED, fd, 0) ret := unix.sys_mmap(nil, page_size, unix.PROT_READ, unix.MAP_SHARED, fd, 0)
if ret < 0 && ret > -4096 { if ret < 0 && ret > -4096 {
return 0, false return 0, false
} }
addr := rawptr(uintptr(ret)) addr := rawptr(uintptr(ret))
defer unix.sys_munmap(addr, page_size) defer unix.sys_munmap(addr, page_size)
event_page := (^unix.Perf_Event_mmap_Page)(addr) event_page := (^unix.Perf_Event_mmap_Page)(addr)
if .User_Time not_in event_page.cap.flags { if .User_Time not_in event_page.cap.flags {
return 0, false return 0, false
} }
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
}
} }
core/time/tsc_windows.odin
+14 -12
View File
@@ -5,20 +5,22 @@ package time
import "core:intrinsics" import "core:intrinsics"
import win32 "core:sys/windows" import win32 "core:sys/windows"
_x86_get_tsc_frequency :: proc "contextless" () -> (u64, bool) { when ODIN_ARCH == .amd64 {
qpc_begin: win32.LARGE_INTEGER _x86_get_tsc_frequency :: proc "contextless" () -> (u64, bool) {
win32.QueryPerformanceCounter(&qpc_begin) qpc_begin: win32.LARGE_INTEGER
tsc_begin := intrinsics.read_cycle_counter() win32.QueryPerformanceCounter(&qpc_begin)
tsc_begin := intrinsics.read_cycle_counter()
win32.Sleep(2) win32.Sleep(2)
qpc_end: win32.LARGE_INTEGER qpc_end: win32.LARGE_INTEGER
win32.QueryPerformanceCounter(&qpc_end) win32.QueryPerformanceCounter(&qpc_end)
tsc_end := intrinsics.read_cycle_counter() tsc_end := intrinsics.read_cycle_counter()
qpc_frequency: win32.LARGE_INTEGER qpc_frequency: win32.LARGE_INTEGER
win32.QueryPerformanceFrequency(&qpc_frequency) win32.QueryPerformanceFrequency(&qpc_frequency)
frequency = u64((u128(tsc_end - tsc_begin) * u128(qpc_frequency)) / u128(qpc_end - qpc_begin)) frequency = u64((u128(tsc_end - tsc_begin) * u128(qpc_frequency)) / u128(qpc_end - qpc_begin))
return frequency, true return frequency, true
}
} }