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Diffstat (limited to 'qemu-options.hx')
| -rw-r--r-- | qemu-options.hx | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/qemu-options.hx b/qemu-options.hx index 3e45483834..81b1e99d58 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -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 |