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Re: [Qemu-devel] Virtio related trace events.
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] Virtio related trace events. |
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Date: |
Wed, 10 Aug 2016 10:56:05 +0100 |
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User-agent: |
Mutt/1.6.2 (2016-07-01) |
On Tue, Aug 09, 2016 at 09:15:20AM +0530, Gadre Nayan wrote:
> echo virtqueue_kick_prepare > /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtqueue_kick >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo scsi_kick_queue >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_dev_match >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_config_changed >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_dev_remove >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_uevent >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo unregister_virtio_driver >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo register_virtio_device >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo unregister_virtio_device >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_init >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_check_driver_offered_feature >>
> /sys/kernel/debug/tracing/set_ftrace_filter
> echo register_virtio_driver >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_finalize_features >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_config_enable >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_dev_probe >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_device_restore >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_device_freeze >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_break_device >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_mmio_remove >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_mmio_probe >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_pci_modern_probe >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_pci_modern_remove >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_pci_release_dev >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_pci_restore >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_pci_freeze >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_pci_remove >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_pci_probe >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_pci_legacy_probe >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_pci_legacy_remove >> /sys/kernel/debug/tracing/set_ftrace_filter
> echo virtio_queue_rq >> /sys/kernel/debug/tracing/set_ftrace_filter
These functions are in the virtio guest drivers. You can trace them
inside the guest, the host doesn't call them.
I guess you haven't set up ftrace correctly. If you have trouble with
ftrace, try using perf-probe(1).
Stefan
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