MT poor performance vs modern Windows XP

VM Workstation 11.1.2 on host Kubuntu Linux 15.04 64-bit, Intel Q6600 quad core with 8 GB of RAM.

Since a long time (years ago), I experience a significant performance difference between a Win XP 32 bit comments against newer versions of Windows (high Vista, 32 and 64 bit). It's that keep me from a workstation with Windows 7 and more.

A single thread task composed of successive shooting process and get its output takes 3 x times more on modern windows on XP comments. On another type of task (run the test suite to a compiler, which runs thousands of short-term, current process process on the parallel of available CPUs), modern Windows clients require also 3 x times more. It is the allocation all processors from the host to the virtual computer (only a virtual machine is on at any given time). If only one processor is assigned to the virtual machine, the individual process take less time to run, but the time required by the parallelizable tasks is worse.

By comparison, Windows XP prompt takes 35 seconds to run the test suite, a guest of 64-bit Windows 8.1 takes 100 seconds, which is almost the same as it takes on an old Atom N270 Netbook.

The Windows XP client is using binary translation and this special settings:

MemTrimRate = "30"
mainmem.backing = "swap"
sched.mem.pshare.enable = "FALSE"
prefvmx.useRecommendedLockedMemSize = "TRUE"
monitor.idleLoopSpinUS = "100"

Tried the machine 8.1 Windows with the same settings, with or without binary translation, and improve performance when a single processor is required, but for tasks in parallel, it has remained the same.

Can any idea on how I get a similar performance from the prompt XP + Windows 7 guests?

BTW, memory attributed to the prompt isn't a problem, there are a lot of free memory at any time.

Apparently not much longer be contestation connects to MMU virtualization in the case of Windows 7.

With the virtual machine off, try adding the following options in the .vmx file:

monitor_control.disable_eagervalidate_wide = TRUE

monitor_control.disable_eagervalidate_narrow = TRUE

This may not help and it can actually make things worse, but it is worth it.

Tags: VMware

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