diff options
| author | Dan McDonald <danmcd@joyent.com> | 2020-02-18 13:54:32 -0500 |
|---|---|---|
| committer | Dan McDonald <danmcd@joyent.com> | 2021-06-22 11:15:38 -0400 |
| commit | 5d6ae526fc40daf98a23f74bdc170d4810640820 (patch) | |
| tree | a766428ebff53bef42d402826d873891d60136be | |
| parent | d2efcfc81ce15b9a53a68d28a4eb440687ac3f22 (diff) | |
| download | illumos-joyent-OS-5804-cheesy.tar.gz | |
OS-5804 lxbrand needs support for CLOCK_*_CPUTIME_ID timersOS-5804-cheesy
| -rw-r--r-- | usr/src/uts/common/brand/lx/syscall/lx_timer.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/usr/src/uts/common/brand/lx/syscall/lx_timer.c b/usr/src/uts/common/brand/lx/syscall/lx_timer.c index 279bdbddc7..ba94c50ecf 100644 --- a/usr/src/uts/common/brand/lx/syscall/lx_timer.c +++ b/usr/src/uts/common/brand/lx/syscall/lx_timer.c @@ -10,7 +10,7 @@ */ /* - * Copyright 2016 Joyent, Inc. + * Copyright 2020 Joyent, Inc. */ /* @@ -20,9 +20,16 @@ * contrast, the Linux kernel is furnished with an overabundance of narrowly * differentiated clock types. * - * Fortunately, most of the commonly used Linux clock types are either similar - * enough to the native clock backends that they can be directly mapped, or - * represent queries to the per-process and per-LWP microstate counters. + * Fortunately, most of the commonly used Linux clock types are similar + * enough to the native clock backends that they can be directly mapped. + * + * Unfortunately, while CLOCK_{THREAD,PROCESS}_CPUTIME_ID are *somewhat* + * implemented in the main illumos kernel as itimers (see setitimer(2)), we + * would need to entirely bringup of CLOCK_{THREAD,PROCESS}_CPUTIME_ID to + * implement timer_create() and friends. For now, we opt to map it to + * CLOCK_HIGHRES for timer_create() and friends, but continue to emulate + * more-accurate queries to per-process or per-LWP microstate accounting for + * getres, gettime, or settime. * * CLOCK_BOOTTIME is identical to CLOCK_MONOTONIC, except that it takes into * account time that the system is suspended. Since that is uninteresting to @@ -83,8 +90,8 @@ struct lx_timezone { static lx_clock_backend_t lx_clock_backends[] = { NATIVE(CLOCK_REALTIME), /* LX_CLOCK_REALTIME */ NATIVE(CLOCK_HIGHRES), /* LX_CLOCK_MONOTONIC */ - EMUL(CLOCK_PROCESS_CPUTIME_ID), /* LX_CLOCK_PROCESS_CPUTIME_ID */ - EMUL(CLOCK_THREAD_CPUTIME_ID), /* LX_CLOCK_THREAD_CPUTIME_ID */ + EMUL(CLOCK_HIGHRES), /* LX_CLOCK_PROCESS_CPUTIME_ID */ + EMUL(CLOCK_HIGHRES), /* LX_CLOCK_THREAD_CPUTIME_ID */ NATIVE(CLOCK_HIGHRES), /* LX_CLOCK_MONOTONIC_RAW */ NATIVE(CLOCK_REALTIME), /* LX_CLOCK_REALTIME_COARSE */ NATIVE(CLOCK_HIGHRES), /* LX_CLOCK_MONOTONIC_COARSE */ |