diff options
| author | Cao jin <caoj.fnst@cn.fujitsu.com> | 2016-07-29 19:05:36 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-09-13 19:08:44 +0200 |
| commit | 490ab15a4948f9150fae781fc421becce9221b32 (patch) | |
| tree | 7624e8ef06393999c5e216605fbc7674cd851a84 /include/qemu/timer.h | |
| parent | 5b1b6dbd94e2e2e98920f886cb32fcf4a1520b50 (diff) | |
| download | qemu-490ab15a4948f9150fae781fc421becce9221b32.zip qemu-490ab15a4948f9150fae781fc421becce9221b32.tar.gz qemu-490ab15a4948f9150fae781fc421becce9221b32.tar.bz2 | |
timer: update comments
The comments is outdated. The patch has following changes:
1. tense correction.
2. all clock time value is returned in nanoseconds, so, they are same in
precision.
3. virtual clock doesn't use cpu cycles.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com>
Message-Id: <1469790338-28990-2-git-send-email-caoj.fnst@cn.fujitsu.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/qemu/timer.h')
| -rw-r--r-- | include/qemu/timer.h | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/include/qemu/timer.h b/include/qemu/timer.h index 309f3d0..34650b2 100644 --- a/include/qemu/timer.h +++ b/include/qemu/timer.h @@ -22,23 +22,20 @@ * @QEMU_CLOCK_REALTIME: Real time clock * * The real time clock should be used only for stuff which does not - * change the virtual machine state, as it is run even if the virtual - * machine is stopped. The real time clock has a frequency of 1000 - * Hz. + * change the virtual machine state, as it runs even if the virtual + * machine is stopped. * * @QEMU_CLOCK_VIRTUAL: virtual clock * - * The virtual clock is only run during the emulation. It is stopped - * when the virtual machine is stopped. Virtual timers use a high - * precision clock, usually cpu cycles (use ticks_per_sec). + * The virtual clock only runs during the emulation. It stops + * when the virtual machine is stopped. * * @QEMU_CLOCK_HOST: host clock * - * The host clock should be use for device models that emulate accurate + * The host clock should be used for device models that emulate accurate * real time sources. It will continue to run when the virtual machine * is suspended, and it will reflect system time changes the host may - * undergo (e.g. due to NTP). The host clock has the same precision as - * the virtual clock. + * undergo (e.g. due to NTP). * * @QEMU_CLOCK_VIRTUAL_RT: realtime clock used for icount warp * @@ -77,10 +74,6 @@ struct QEMUTimer { extern QEMUTimerListGroup main_loop_tlg; /* - * QEMUClockType - */ - -/* * qemu_clock_get_ns; * @type: the clock type * |