From: Stefan Hajnoczi <stefanha@gmail.com>
To: Gadre Nayan <gadrenayan@gmail.com>
Cc: qemu-devel@nongnu.org, qemu-discuss@nongnu.org
Subject: Re: [Qemu-devel] Virtio related trace events.
Date: Wed, 10 Aug 2016 10:56:05 +0100 [thread overview]
Message-ID: <20160810095605.GG1109@stefanha-x1.localdomain> (raw)
In-Reply-To: <CAKJ7aR5bNcAKFR+4khxEFgD8Kve_jkxW-4tp95JraQgUtZRNgg@mail.gmail.com>
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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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prev parent reply other threads:[~2016-08-10 10:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-09 3:45 [Qemu-devel] Virtio related trace events Gadre Nayan
2016-08-09 3:50 ` [Qemu-devel] Fwd: " Gadre Nayan
2016-08-10 9:56 ` Stefan Hajnoczi [this message]
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