Searched hist:9655 (Results 1 - 6 of 6) sorted by relevance
| /gem5/src/cpu/kvm/ | ||
| H A D | timer.hh | 9655:78c9adc85718 Mon Apr 22 13:20:00 EDT 2013 Andreas Sandberg <Andreas.Sandberg@ARM.com> kvm: Add experimental support for a perf-based execution timer Add support for using the CPU cycle counter instead of a normal POSIX timer to generate timed exits to gem5. This should, in theory, provide better resolution when requesting timer signals. The perf-based timer requires a fairly recent kernel since it requires a working PERF_EVENT_IOC_PERIOD ioctl. This ioctl has existed in the kernel for a long time, but it used to be completely broken due to an inverted match when the kernel copied things from user space. Additionally, the ioctl does not change the sample period correctly on all kernel versions which implement it. It is currently only known to work reliably on kernel version 3.7 and above on ARM. |
| H A D | perfevent.hh | 9655:78c9adc85718 Mon Apr 22 13:20:00 EDT 2013 Andreas Sandberg <Andreas.Sandberg@ARM.com> kvm: Add experimental support for a perf-based execution timer Add support for using the CPU cycle counter instead of a normal POSIX timer to generate timed exits to gem5. This should, in theory, provide better resolution when requesting timer signals. The perf-based timer requires a fairly recent kernel since it requires a working PERF_EVENT_IOC_PERIOD ioctl. This ioctl has existed in the kernel for a long time, but it used to be completely broken due to an inverted match when the kernel copied things from user space. Additionally, the ioctl does not change the sample period correctly on all kernel versions which implement it. It is currently only known to work reliably on kernel version 3.7 and above on ARM. |
| H A D | timer.cc | 9655:78c9adc85718 Mon Apr 22 13:20:00 EDT 2013 Andreas Sandberg <Andreas.Sandberg@ARM.com> kvm: Add experimental support for a perf-based execution timer Add support for using the CPU cycle counter instead of a normal POSIX timer to generate timed exits to gem5. This should, in theory, provide better resolution when requesting timer signals. The perf-based timer requires a fairly recent kernel since it requires a working PERF_EVENT_IOC_PERIOD ioctl. This ioctl has existed in the kernel for a long time, but it used to be completely broken due to an inverted match when the kernel copied things from user space. Additionally, the ioctl does not change the sample period correctly on all kernel versions which implement it. It is currently only known to work reliably on kernel version 3.7 and above on ARM. |
| H A D | BaseKvmCPU.py | 9655:78c9adc85718 Mon Apr 22 13:20:00 EDT 2013 Andreas Sandberg <Andreas.Sandberg@ARM.com> kvm: Add experimental support for a perf-based execution timer Add support for using the CPU cycle counter instead of a normal POSIX timer to generate timed exits to gem5. This should, in theory, provide better resolution when requesting timer signals. The perf-based timer requires a fairly recent kernel since it requires a working PERF_EVENT_IOC_PERIOD ioctl. This ioctl has existed in the kernel for a long time, but it used to be completely broken due to an inverted match when the kernel copied things from user space. Additionally, the ioctl does not change the sample period correctly on all kernel versions which implement it. It is currently only known to work reliably on kernel version 3.7 and above on ARM. |
| H A D | base.hh | 9655:78c9adc85718 Mon Apr 22 13:20:00 EDT 2013 Andreas Sandberg <Andreas.Sandberg@ARM.com> kvm: Add experimental support for a perf-based execution timer Add support for using the CPU cycle counter instead of a normal POSIX timer to generate timed exits to gem5. This should, in theory, provide better resolution when requesting timer signals. The perf-based timer requires a fairly recent kernel since it requires a working PERF_EVENT_IOC_PERIOD ioctl. This ioctl has existed in the kernel for a long time, but it used to be completely broken due to an inverted match when the kernel copied things from user space. Additionally, the ioctl does not change the sample period correctly on all kernel versions which implement it. It is currently only known to work reliably on kernel version 3.7 and above on ARM. |
| H A D | base.cc | 9655:78c9adc85718 Mon Apr 22 13:20:00 EDT 2013 Andreas Sandberg <Andreas.Sandberg@ARM.com> kvm: Add experimental support for a perf-based execution timer Add support for using the CPU cycle counter instead of a normal POSIX timer to generate timed exits to gem5. This should, in theory, provide better resolution when requesting timer signals. The perf-based timer requires a fairly recent kernel since it requires a working PERF_EVENT_IOC_PERIOD ioctl. This ioctl has existed in the kernel for a long time, but it used to be completely broken due to an inverted match when the kernel copied things from user space. Additionally, the ioctl does not change the sample period correctly on all kernel versions which implement it. It is currently only known to work reliably on kernel version 3.7 and above on ARM. |
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