diff --git a/core/libs/prx/libkernel/CMakeLists.txt b/core/libs/prx/libkernel/CMakeLists.txt
index 3f10d3021..4eeda26c9 100644
--- a/core/libs/prx/libkernel/CMakeLists.txt
+++ b/core/libs/prx/libkernel/CMakeLists.txt
@@ -303,6 +303,16 @@ if(BUILD_TESTING)
         set_tests_properties(guest_available_cpumask PROPERTIES ENVIRONMENT_MODIFICATION
             "PATH=path_list_prepend:$<TARGET_FILE_DIR:libkernel>")
     endif()
+    add_test_executable(guest_getrusage_tests ${LIBS_INCLUDE_DIR}/tests/GuestGetrusage.cpp)
+    target_include_directories(guest_getrusage_tests PRIVATE ${LIBS_INCLUDE_DIR})
+    target_link_libraries(guest_getrusage_tests PRIVATE libkernel libc)
+    configure_windows_unwind(guest_getrusage_tests)
+    add_test(NAME guest_getrusage COMMAND guest_getrusage_tests)
+    set_tests_properties(guest_getrusage PROPERTIES TIMEOUT 20)
+    if(WIN32)
+        set_tests_properties(guest_getrusage PROPERTIES ENVIRONMENT_MODIFICATION
+            "PATH=path_list_prepend:$<TARGET_FILE_DIR:libkernel>")
+    endif()
     add_test_executable(guest_kernel_error_tests ${LIBS_INCLUDE_DIR}/tests/GuestKernelErrors.cpp)
     target_include_directories(guest_kernel_error_tests PRIVATE ${LIBS_INCLUDE_DIR})
     target_link_libraries(guest_kernel_error_tests PRIVATE libkernel libc)
diff --git a/core/libs/prx/libkernel/System/src/Process.cpp b/core/libs/prx/libkernel/System/src/Process.cpp
index a3838db51..cc9e1301f 100644
--- a/core/libs/prx/libkernel/System/src/Process.cpp
+++ b/core/libs/prx/libkernel/System/src/Process.cpp
@@ -290,10 +290,8 @@ int APS5_VABI getrusage_nid_postfix(int who, GuestResourceUsage* usage) {
     usage->ru_nvcsw = 0;
     usage->ru_nivcsw = 0;
 #else
-    if (who == 1)
-        throw std::invalid_argument("getrusage: RUSAGE_THREAD is not supported on this platform");
     struct rusage native{};
-    if (::getrusage(RUSAGE_SELF, &native) != 0)
+    if (::getrusage(who == 0 ? RUSAGE_SELF : RUSAGE_THREAD, &native) != 0)
         throw std::system_error(errno, std::generic_category(), "getrusage: getrusage failed");
     usage->ru_utime.tv_sec = static_cast<std::int64_t>(native.ru_utime.tv_sec);
     usage->ru_utime.tv_usec = static_cast<std::int64_t>(native.ru_utime.tv_usec);
diff --git a/core/libs/tests/GuestGetrusage.cpp b/core/libs/tests/GuestGetrusage.cpp
new file mode 100644
index 000000000..a549808cf
--- /dev/null
+++ b/core/libs/tests/GuestGetrusage.cpp
@@ -0,0 +1,42 @@
+#include "prx/libc/include/general/VabiMacros.hpp"
+#include <chrono>
+#include <cstdint>
+#include <cstdlib>
+#include <thread>
+struct Timeval {
+    std::int64_t tv_sec;
+    std::int64_t tv_usec;
+};
+struct ResourceUsage {
+    Timeval ru_utime;
+    Timeval ru_stime;
+    std::int64_t rest[14];
+};
+extern "C" int APS5_VABI getrusage_nid_postfix(int who, ResourceUsage* usage);
+static void Require(bool value) { if (!value) std::abort(); }
+static std::int64_t CpuMicros(int who) {
+    ResourceUsage usage{};
+    Require(getrusage_nid_postfix(who, &usage) == 0);
+    return (usage.ru_utime.tv_sec + usage.ru_stime.tv_sec) * 1000000 + usage.ru_utime.tv_usec + usage.ru_stime.tv_usec;
+}
+static void SpinUntil(int who, std::int64_t micros) {
+    const auto deadline = std::chrono::steady_clock::now() + std::chrono::seconds(10);
+    volatile std::uint64_t sink = 0;
+    while (CpuMicros(who) < micros) {
+        for (int i = 0; i < 100000; ++i) sink = sink + i;
+        Require(std::chrono::steady_clock::now() < deadline);
+    }
+}
+int main() {
+    SpinUntil(0, 400000);
+    const std::int64_t mainThread = CpuMicros(1);
+    Require(mainThread >= 200000);
+    std::thread worker([] {
+        const std::int64_t fresh = CpuMicros(1);
+        Require(fresh < 100000);
+        SpinUntil(1, fresh + 100000);
+        Require(CpuMicros(0) >= CpuMicros(1) + 300000);
+    });
+    worker.join();
+    Require(CpuMicros(0) >= 500000);
+}