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ec6dd85f6e
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Arnaldo Carvalho de Melo ec6dd85f6e perf trace beautify ioctl: Beautify vhost virtio ioctl's 'cmd' arg 
Also trying a new approach, using a copy of uapi/linux/vhost.h we auto
generate the string tables, then include it in the ioctl cmd beautifier.

This way either the KVM developers will add the new commands to the
tools/ copy, like is happening with other areas of tools/include/ (bpf.h
comes to mind), or we'll be notified when building perf that our copy
drifted.

E.g., doing syswide tracing grepping for the newly beautified VHOST
ioctls:

  # perf trace -e ioctl 2>&1 | grep VHOST
  3873.064 ( 0.099 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_NET_SET_BACKEND, arg: 0x7fff053dffe0) = 0
  3873.168 ( 0.019 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_NET_SET_BACKEND, arg: 0x7fff053dffe0) = 0
  3873.226 ( 0.006 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_GET_VRING_BASE, arg: 0x7fff053dff60) = 0
  3873.244 ( 0.002 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_GET_VRING_BASE, arg: 0x7fff053dff60) = 0
  3873.817 ( 0.014 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_SET_VRING_CALL, arg: 0x7fff053dff20) = 0
  3873.838 ( 0.004 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_SET_VRING_CALL, arg: 0x7fff053dff20) = 0
  4701.372 ( 0.006 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_SET_VRING_CALL, arg: 0x7fff053dfe20) = 0
  4701.417 ( 0.007 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_SET_VRING_CALL, arg: 0x7fff053dfe20) = 0
  4701.563 ( 0.004 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_SET_FEATURES, arg: 0x7fff053dfe88) = 0
  4701.571 ( 0.028 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_SET_MEM_TABLE, arg: 0x563c7c906870) = 0
  4701.604 ( 0.003 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_SET_VRING_NUM, arg: 0x7fff053dff00) = 0
  4701.609 ( 0.002 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_SET_VRING_BASE, arg: 0x7fff053dff00) = 0
  4701.615 ( 0.002 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_SET_VRING_ADDR, arg: 0x7fff053dfe70) = 0
  4701.619 ( 0.008 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_SET_VRING_KICK, arg: 0x7fff053dfef0) = 0
  4701.634 ( 0.004 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_SET_VRING_NUM, arg: 0x7fff053dff00) = 0
  4701.640 ( 0.002 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_SET_VRING_BASE, arg: 0x7fff053dff00) = 0
  4701.644 ( 0.002 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_SET_VRING_ADDR, arg: 0x7fff053dfe70) = 0
  4701.648 ( 0.009 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_SET_VRING_KICK, arg: 0x7fff053dfef0) = 0
  4701.665 ( 0.005 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_NET_SET_BACKEND, arg: 0x7fff053dff80) = 0
  4701.672 ( 0.004 ms): qemu-system-x8/21238 ioctl(fd: 27</dev/vhost-net>, cmd: VHOST_NET_SET_BACKEND, arg: 0x7fff053dff80) = 0
^C

 '-e ioctl' uses tracepoint filters, in time this will be replaces by
eBPF filters hooked at the syscall tracepoints and that "grep VHOST"
will also be done with eBPF, right at the kernel, to reduce overhead.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-2gthnhpliunvakywjterrzz3@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-08-01 13:32:46 -03:00
..
accounting
arch tools headers: Sync kernel ABI headers with tooling headers 2017-07-31 10:35:28 -03:00
build Merge branch 'perf/urgent' into perf/core, to pick up latest fixes and refresh the tree 2017-07-30 11:15:13 +02:00
cgroup
firewire
gpio gpio-hammer: fix make consumer_label suitable to work on gpio-nails 2017-01-26 16:29:09 +01:00
hv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-07-05 12:31:59 -07:00
iio iio: tools: generic_buffer: increase trigger length 2017-05-07 16:08:04 +01:00
include tools include uapi: Grab a copy of linux/vhost.h 2017-08-01 13:04:56 -03:00
kvm/kvm_stat tools/kvm_stat: add new interactive command 'b' 2017-06-27 16:44:50 +02:00
laptop
leds tools/leds: Add led_hw_brightness_mon program 2017-02-14 22:20:23 +01:00
lguest Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-05-01 20:51:12 -07:00
lib perf build: Clarify open-coded header version warning message 2017-07-31 10:30:06 -03:00
net tools: bpf_jit_disasm: Handle large images. 2017-06-14 15:03:22 -04:00
nfsd
objtool objtool: Fix sibling call detection logic 2017-07-08 10:29:48 +02:00
pci tools: PCI: Add sample test script to invoke pcitest 2017-04-28 10:23:20 -05:00
pcmcia
perf perf trace beautify ioctl: Beautify vhost virtio ioctl's 'cmd' arg 2017-08-01 13:32:46 -03:00
power ACPI updates for v4.13-rc1 2017-07-04 14:16:49 -07:00
scripts kbuild: simplify silent build (-s) detection 2017-06-06 09:01:12 +09:00
spi spi: spidev_test: add option to continuously transfer data 2017-03-21 18:44:40 +00:00
testing Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-07-20 16:33:39 -07:00
thermal/tmon
time
usb usb: changes for v4.13 merge window 2017-06-20 11:39:34 +08:00
virtio tools/virtio: fix spelling mistake: "wakeus" -> "wakeups" 2017-05-09 16:43:24 +03:00
vm tools/vm: add missing Makefile rules 2017-02-22 16:41:26 -08:00
Makefile tools: Add install make target for liblockdep 2017-06-05 09:28:08 +02:00