diff --git a/java/openjdk17/Makefile b/java/openjdk17/Makefile
--- a/java/openjdk17/Makefile
+++ b/java/openjdk17/Makefile
@@ -1,7 +1,7 @@
 PORTNAME=	openjdk
 DISTVERSIONPREFIX=	jdk-
 DISTVERSION=	${JDK_MAJOR_VERSION}.${JDK_MINOR_VERSION}.${JDK_PATCH_VERSION}+${JDK_BUILD_NUMBER}-${BSD_JDK_VERSION}
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	java devel
 PKGNAMESUFFIX?=	${JDK_MAJOR_VERSION}
 
diff --git a/java/openjdk17/files/patch-src_hotspot_os_bsd_globals__bsd.hpp b/java/openjdk17/files/patch-src_hotspot_os_bsd_globals__bsd.hpp
new file mode 100644
--- /dev/null
+++ b/java/openjdk17/files/patch-src_hotspot_os_bsd_globals__bsd.hpp
@@ -0,0 +1,14 @@
+--- src/hotspot/os/bsd/globals_bsd.hpp.orig	2023-10-09 09:47:10 UTC
++++ src/hotspot/os/bsd/globals_bsd.hpp
+@@ -36,6 +36,11 @@
+                          range,       \
+                          constraint)  \
+                                                     \
++  /*  NB: The default value of UseBsdPosixThreadCPUClocks may be   */ \
++  /* overridden in Arguments::parse_each_vm_init_arg.                */ \
++  product(bool, UseBsdPosixThreadCPUClocks, true,                     \
++          "enable fast BSD Posix clocks where available")             \
++                                                                        \
+   product(bool, UseHugeTLBFS, false,                \
+           "Use MAP_HUGETLB for large pages")        \
+                                                     \
diff --git a/java/openjdk17/files/patch-src_hotspot_os_bsd_os__bsd.hpp b/java/openjdk17/files/patch-src_hotspot_os_bsd_os__bsd.hpp
new file mode 100644
--- /dev/null
+++ b/java/openjdk17/files/patch-src_hotspot_os_bsd_os__bsd.hpp
@@ -0,0 +1,12 @@
+--- src/hotspot/os/bsd/os_bsd.hpp.orig	2023-07-19 03:18:33 UTC
++++ src/hotspot/os/bsd/os_bsd.hpp
+@@ -76,6 +76,9 @@ class Bsd {
+   // Real-time clock functions
+   static void clock_init(void);
+ 
++  // fast POSIX clocks support
++  static void fast_thread_clock_init(void);
++
+   // Stack repair handling
+ 
+   // none present
diff --git a/java/openjdk17/files/patch-src_hotspot_os_bsd_os__bsd.cpp b/java/openjdk17/files/patch-src_hotspot_os_bsd_os__bsd.cpp
--- a/java/openjdk17/files/patch-src_hotspot_os_bsd_os__bsd.cpp
+++ b/java/openjdk17/files/patch-src_hotspot_os_bsd_os__bsd.cpp
@@ -1,6 +1,6 @@
---- src/hotspot/os/bsd/os_bsd.cpp.orig	2021-09-29 21:25:10 UTC
+--- src/hotspot/os/bsd/os_bsd.cpp.orig	2023-07-19 03:18:33 UTC
 +++ src/hotspot/os/bsd/os_bsd.cpp
-@@ -361,7 +361,7 @@
+@@ -388,7 +388,7 @@ void os::init_system_properties_values() {
      #elif defined(__NetBSD__)
        #define DEFAULT_LIBPATH "/usr/lib:/usr/pkg/lib"
      #else
@@ -9,3 +9,44 @@
      #endif
    #else
      #define DEFAULT_LIBPATH OVERRIDE_LIBPATH
+@@ -871,8 +871,31 @@ void os::Bsd::clock_init() {
+ }
+ #endif
+ 
++void os::Bsd::fast_thread_clock_init() {
++  if (!UseBsdPosixThreadCPUClocks) {
++    return;
++  }
++  clockid_t clockid;
++  struct timespec tp;
++  int (*pthread_getcpuclockid_func)(pthread_t, clockid_t *) =
++      (int(*)(pthread_t, clockid_t *)) dlsym(RTLD_DEFAULT, "pthread_getcpuclockid");
+ 
++  // Switch to using fast clocks for thread cpu time if
++  // the clock_getres() returns 0 error code.
++  // Note, that some kernels may support the current thread
++  // clock (CLOCK_THREAD_CPUTIME_ID) but not the clocks
++  // returned by the pthread_getcpuclockid().
++  // If the fast Posix clocks are supported then the clock_getres()
++  // must return at least tp.tv_sec == 0 which means a resolution
++  // better than 1 sec. This is extra check for reliability.
+ 
++  if (pthread_getcpuclockid_func &&
++      pthread_getcpuclockid_func(_main_thread, &clockid) == 0 &&
++      clock_getres(clockid, &tp) == 0 && tp.tv_sec == 0) {
++    _getcpuclockid = pthread_getcpuclockid_func;
++  }
++}
++
+ #ifdef __APPLE__
+ 
+ jlong os::javaTimeNanos() {
+@@ -2213,6 +2236,8 @@ jint os::init_2(void) {
+   DEBUG_ONLY(os::set_mutex_init_done();)
+ 
+   os::Posix::init_2();
++
++  Bsd::fast_thread_clock_init();
+ 
+   if (PosixSignals::init() == JNI_ERR) {
+     return JNI_ERR;