This is a very short post with instructions on how to install perf on Ubunutu 20.04 LTS in Oracle Cloud Infrastructure (OCI). I created my VM using the Canonical-Ubuntu-20.04-Minimal-2021.06.14-0 image.
Updating the image first
The first thing I do with each image I spin up in the cloud is to update all the packages. By the way, you log into ubuntu using the ubuntu account (not opc):
$ ssh ubuntu@1.2.3.3 Welcome to Ubuntu 20.04.2 LTS (GNU/Linux 5.8.0-1034-oracle x86_64) * Documentation: https://help.ubuntu.com * Management: https://landscape.canonical.com * Support: https://ubuntu.com/advantage This system has been minimized by removing packages and content that are not required on a system that users do not log into. To restore this content, you can run the 'unminimize' command. 0 updates can be applied immediately. Last login: Tue Jul 13 19:52:40 2021 from 1.2.3.2
The command to update all packages in Ubuntu is a one-liner:
$ sudo apt-get update && sudo apt-get dist-upgrade -y
In many cases a new kernel is installed as part of that exercise, mandating a reboot.
Installing perf
The current kernel at the time of writing was 5.8.0-1034-oracle. It’s nice to see that Oracle chose the HWE kernel (eg 5.8x.) over the GA kernel (5.4.x).
I used the following command to install perf on the VM:
$ sudo apt-get install linux-tools-$(uname -r) linux-tools-generic Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: libdw1 libnuma1 libpci3 libslang2 libunwind8 linux-oracle-5.8-tools-5.8.0-1034 linux-tools-5.4.0-77 linux-tools-5.4.0-77-generic linux-tools-common pci.ids The following NEW packages will be installed: libdw1 libnuma1 libpci3 libslang2 libunwind8 linux-oracle-5.8-tools-5.8.0-1034 linux-tools-5.4.0-77 linux-tools-5.4.0-77-generic linux-tools-5.8.0-1034-oracle linux-tools-common linux-tools-generic pci.ids 0 upgraded, 12 newly installed, 0 to remove and 0 not upgraded. Need to get 12.9 MB of archives. After this operation, 59.3 MB of additional disk space will be used. Do you want to continue? [Y/n] y Get:1 http://eu-frankfurt-1-ad-3.clouds.archive.ubuntu.com/ubuntu focal/main amd64 libslang2 amd64 2.3.2-4 [429 kB] ...
Once the installation is complete I can use perf as usual:
$ perf --version perf version 5.8.18
Tracepoints!
A quick check of static tracepoints reveals plenty in 5.8.0-1034-oracle:
$ sudo perf list tracepoint | \
> awk -F: '{ a[$1]++ } END { for (i in a) print i, a[i]}' | \
> column
syscalls 670 sync_trace 1 interconnect 2
scsi 5 rcu 1 skb 3
io_uring 14 i2c 4 nmi 1
exceptions 2 rseq 2 msr 3
qdisc 4 mmc 2 xen 27
drm 3 erofs 9 jbd2 17
mce 1 tlb 1 napi 1
libata 6 x86_fpu 11 clk 16
block 18 pwm 2 fib 1
rpm 5 power 22 workqueue 4
xdp 12 page_pool 4 tcp 7
iocost 5 timer 13 cpuhp 3
thermal 5 initcall 3 filelock 12
rtc 12 printk 1 smbus 4
cros_ec 2 intel_iommu 7 pagemap 2
writeback 34 alarmtimer 4 compaction 14
gpio 2 hwmon 3 sched 24
iomap 8 regmap 15 mdio 1
devlink 5 btrfs 79 bpf_test_run 1
sunrpc 109 udp 1 irq_vectors 34
neigh 7 net 18 vmscan 18
irq 5 regulator 11 irq_matrix 12
devfreq 1 random 15 page_isolation 1
hyperv 5 task 2 ftrace 2
percpu 5 huge_memory 4 wbt 4
migrate 1 raw_syscalls 2 iscsi 7
thermal_power_allocator 2 mmap 1 fs_dax 14
ras 6 iommu 7 oom 8
sock 3 fib6 1 signal 2
vsyscall 1 swiotlb 1 kmem 13
bridge 4 cgroup 13 filemap 4
spi 7 module 5 resctrl 3
xhci-hcd 53 ext4 105 dma_fence 7
I’ll do a few more tests later, but for now it seems I’m set and ready to go. Should you find problems I’m happy to update the post so please let me know!
Martins Blog 