On 16/10/2015 15:36, Peter Maydell wrote:
>> We could add "-d trace:help" to list valid tracepoint names.
>
> I think people are mostly going to care about categories
> (eg "enable tracing for device X", or "enable tracing for
> all unimplemented features", or "enable a medium level of
> debug tracing for device Y".
I hadn't thought about levels, but honestly when I use KVM tracing (which
is often measured in tens of megabytes per run) I don't care. I just
get a .xz file from the person who reported the bug, with all the events,
and use less/grep on it.
> If we want to get there we need to define standards for
> naming tracepoints and enforce them somehow
> (subsystem_category_level_tracepointname ?)
We're surprisingly good at naming tracepoints. Only 13 files
do not have a common prefix for their tracepoints, conflicts are rare,
and only a few files could arguably improve their naming:
hw/usb/desc.c usb_desc, usb_set, usb_clear
!!
hw/vfio/platform.c vfio_platform (except for one)
!!
migration/savevm.c savevm, qemu_loadvm, vmstate,
qemu_announce_self_iter !!
target-s390x/mmu_helper.c (none)
!!
target-sparc/int32_helper.c int_helper
!!
target-sparc/int64_helper.c int_helper
!!
target-sparc/mmu_helper.c mmu_helper
!!
target-sparc/win_helper.c win_helper
!!
xen-hvm.c handle_ioreq, cpu_ioreq, xen
!!
Globbing should suffice, IMHO.
Full list of prefixes under my signature.
Paolo
audio/alsaaudio.c alsa
audio/ossaudio.c oss
balloon.c virtio_balloon
block/backup.c backup
block.c bdrv
block/commit.c commit
blockdev.c qmp_block
block/mirror.c mirror
block/qcow2-cache.c qcow2
block/qcow2-cluster.c qcow2
block/qcow2.c qcow2
block/qed.c qed
block/qed-l2-cache.c qed
block/qed-table.c qed
block/raw-posix.c paio_submit
block/stream.c stream
cpu-exec.c exec_tb
crypto/tlscredsanon.c qcrypto_tls_creds_anon
crypto/tlscreds.c qcrypto_tls_creds
crypto/tlscredsx509.c qcrypto_tls_creds_x509
crypto/tlssession.c qcrypto_tls_session
dma-helpers.c dma
hw/9pfs/virtio-9p.c v9fs
hw/acpi/memory_hotplug.c mhp_acpi
hw/arm/virt-acpi-build.c virt_acpi
hw/audio/cs4231.c cs4231
hw/audio/milkymist-ac97.c milkymist_ac97
hw/block/dataplane/virtio-blk.c virtio_blk_data_plane
hw/block/hd-geometry.c hd_geometry
hw/block/virtio-blk.c virtio_blk
hw/char/escc.c escc
hw/char/grlib_apbuart.c grlib_apbuart
hw/char/lm32_juart.c lm32_juart
hw/char/lm32_uart.c lm32_uart
hw/char/milkymist-uart.c milkymist_uart
hw/char/virtio-console.c virtio_console
hw/char/virtio-serial-bus.c virtio_serial
hw/display/g364fb.c g364fb
hw/display/jazz_led.c jazz_led
hw/display/milkymist-tmu2.c milkymist_tmu2
hw/display/milkymist-vgafb.c milkymist_vgafb_memory
hw/display/qxl.c qxl
hw/display/qxl-render.c qxl_render
hw/display/virtio-gpu.c virtio_gpu
hw/display/vmware_vga.c vmware
hw/display/xenfb.c xenfb
hw/dma/i8257.c i8257
hw/dma/rc4030.c rc4030, jazzio
hw/dma/sparc32_dma.c sparc32, espdma, ledma
hw/dma/sun4m_iommu.c sun4m_iommu
hw/i386/pc.c mhp_pc_dimm
hw/i386/xen/xen_platform.c xen
hw/i386/xen/xen_pvdevice.c xen_pv_mmio
hw/input/milkymist-softusb.c milkymist_softusb
hw/input/ps2.c ps2
hw/intc/apic.c apic
hw/intc/apic_common.c cpu, apic
hw/intc/grlib_irqmp.c grlib_irqmp
hw/intc/lm32_pic.c lm32_pic
hw/intc/s390_flic_kvm.c flic
hw/intc/slavio_intctl.c slavio
hw/intc/xics.c xics
hw/isa/pc87312.c pc87312
hw/misc/eccmemctl.c ecc
hw/misc/milkymist-hpdmc.c milkymist_hpdmc_memory
hw/misc/milkymist-pfpu.c milkymist_pfpu
hw/misc/slavio_misc.c slavio
hw/net/lance.c lance
hw/net/milkymist-minimac2.c milkymist_minimac2
hw/net/mipsnet.c mipsnet
hw/net/opencores_eth.c open_eth
hw/net/pcnet.c pcnet
hw/net/pcnet-pci.c pcnet
hw/nvram/ds1225y.c nvram
hw/nvram/fw_cfg.c fw_cfg
hw/pci/pci.c pci_update_mappings
hw/pci/pci_host.c pci_cfg
hw/ppc/ppc.c ppc
hw/ppc/spapr.c spapr_cas
hw/ppc/spapr_hcall.c spapr_cas
hw/ppc/spapr_iommu.c spapr_iommu
hw/ppc/spapr_pci.c spapr_pci
hw/s390x/css.c css
hw/s390x/virtio-ccw.c virtio_ccw
hw/scsi/esp.c esp
hw/scsi/esp-pci.c esp_pci
hw/scsi/megasas.c megasas
hw/scsi/scsi-bus.c scsi_req, scsi
hw/scsi/vmw_pvscsi.c pvscsi
hw/sd/milkymist-memcard.c milkymist_memcard_memory
hw/sparc/leon3.c leon3
hw/sparc/sun4m.c sun4m_cpu
hw/timer/grlib_gptimer.c grlib_gptimer
hw/timer/lm32_timer.c lm32_timer
hw/timer/milkymist-sysctl.c milkymist_sysctl
hw/timer/slavio_timer.c slavio
hw/usb/bus.c usb_port
hw/usb/core.c usb_packet_state
hw/usb/dev-hub.c usb_hub
hw/usb/dev-mtp.c usb_mtp
hw/usb/dev-uas.c usb_uas
hw/usb/hcd-ehci.c usb_ehci
hw/usb/hcd-ohci.c usb_ohci
hw/usb/hcd-uhci.c usb_uhci
hw/usb/hcd-xhci.c usb_xhci
hw/usb/host-libusb.c usb_host
hw/vfio/pci.c vfio
hw/vfio/pci-quirks. vfio_quirk
hw/vfio/vfio-common.c vfio
hw/virtio/dataplane/vring.c vring
hw/virtio/virtio.c virtio, virtqueue
hw/virtio/virtio-rng.c virtio_rng
ioport.c cpu
kvm-all.c kvm
memory.c memory_region_ops
migration.c migration, migrate
migration/ram.c migration
migration/rdma.c qemu_rdma, rdma
monitor.c monitor_protocol
qemu-coroutine.c qemu_coroutine
qemu-coroutine-lock.c qemu_co
qemu-file.c qemu_file
qom/object.c object
spice-qemu-char.c spice_vmc
target-ppc/kvm.c kvm
target-s390x/cpu.c cpu
target-s390x/ioinst.c ioinst
target-s390x/kvm.c kvm
thread-pool.c thread_pool
translate-all.c translate
ui/console.c displaychangelistener, displaysurface, console
ui/gtk.c gd
ui/input.c input
ui/spice-display.c qemu_spice
ui/vnc.c vnc_key
util/hbitmap.c hbitmap
vl.c qemu_system
vmstate.c vmstate
xen-mapcache.c xen
