diff options
Diffstat (limited to 'qemu-options.hx')
| -rw-r--r-- | qemu-options.hx | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/qemu-options.hx b/qemu-options.hx index d5b0c26e8e..81b1e99d58 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -130,7 +130,7 @@ ETEXI DEF("accel", HAS_ARG, QEMU_OPTION_accel, "-accel [accel=]accelerator[,thread=single|multi]\n" " select accelerator (kvm, xen, hax, hvf, whpx or tcg; use 'help' for a list)\n" - " thread=single|multi (enable multi-threaded TCG)", QEMU_ARCH_ALL) + " thread=single|multi (enable multi-threaded TCG)\n", QEMU_ARCH_ALL) STEXI @item -accel @var{name}[,prop=@var{value}[,...]] @findex -accel @@ -3325,6 +3325,30 @@ mlocking qemu and guest memory can be enabled via @option{mlock=on} (enabled by default). ETEXI +DEF("overcommit", HAS_ARG, QEMU_OPTION_overcommit, + "--overcommit [mem-lock=on|off][cpu-pm=on|off]\n" + " run qemu with overcommit hints\n" + " mem-lock=on|off controls memory lock support (default: off)\n" + " cpu-pm=on|off controls cpu power management (default: off)\n", + QEMU_ARCH_ALL) +STEXI +@item -overcommit mem-lock=on|off +@item -overcommit cpu-pm=on|off +@findex -overcommit +Run qemu with hints about host resource overcommit. The default is +to assume that host overcommits all resources. + +Locking qemu and guest memory can be enabled via @option{mem-lock=on} (disabled +by default). This works when host memory is not overcommitted and reduces the +worst-case latency for guest. This is equivalent to @option{realtime}. + +Guest ability to manage power state of host cpus (increasing latency for other +processes on the same host cpu, but decreasing latency for guest) can be +enabled via @option{cpu-pm=on} (disabled by default). This works best when +host CPU is not overcommitted. When used, host estimates of CPU cycle and power +utilization will be incorrect, not taking into account guest idle time. +ETEXI + DEF("gdb", HAS_ARG, QEMU_OPTION_gdb, \ "-gdb dev wait for gdb connection on 'dev'\n", QEMU_ARCH_ALL) STEXI @@ -3421,7 +3445,7 @@ STEXI Enable HAX (Hardware-based Acceleration eXecution) support. This option is only available if HAX support is enabled when compiling. HAX is only applicable to MAC and Windows platform, and thus does not conflict with -KVM. +KVM. This option is deprecated, use @option{-accel hax} instead. ETEXI DEF("xen-domid", HAS_ARG, QEMU_OPTION_xen_domid, |