On Thu, Aug 20, 2020 at 10:05 AM Willy Tarreau <w...@1wt.eu> wrote: > > On Thu, Aug 20, 2020 at 08:58:38AM +0200, Willy Tarreau wrote: > > I've just pushed a new branch "20200820-siphash-noise" that I also > > rebased onto latest master. It's currently running make allmodconfig > > here, so that will take a while, but I think it's OK as random32.o is > > already OK. I've also addressed a strange build issue caused by having > > an array instead of 4 ints in siprand_state. > > > > Please just let me know if that's OK for you now. > > At least it worked for me now (built with no errors on x86_64): > > $ time make -j 8 bzImage modules > (...) > real 65m7.986s > user 477m22.477s > sys 38m0.545s > $ find . -name '*.ko' |wc -l > 7983 >
Runs fine here. Thanks Willy for the "20200820-siphash-noise" [1] patchset and including/fixing all my reported issues. [1] Staging driver build failures fixed by... WIP: random32: rename the K0/K1 SipHash constants to PRND_K* [2] modpost undefined "net_rand_noise" errors fixed by... WIP: random32: export net_rand_noise [3] Consolidate/move/cleanup stuff in random32.c and prandom.h WIP: random32: keep a single macro definition for sipround This patchset looks very good to me :-). [ TESTING WITH LTP ] I run another perf-session by running "LTP::net.features::tcp_fastopen" test only. Unsure if there exist some more appropriate LTP tests. For example there exists "net_stress.*" (see [2]). [ PERF-SESSION ] Link: https://github.com/ClangBuiltLinux/linux/issues/1086#issuecomment-675783804 /home/dileks/bin/perf list | grep prandom_u32 | column -t random:prandom_u32 [Tracepoint event] cd /opt/ltp echo 0 | tee /proc/sys/kernel/kptr_restrict /proc/sys/kernel/perf_event_paranoid /home/dileks/bin/perf record -a -g -e random:prandom_u32 ./runltp -f net.features -s tcp_fastopen /home/dileks/bin/perf report --no-children --stdio > ./perf-report.txt /home/dileks/bin/perf script > ./perf-script.txt echo 1 | tee /proc/sys/kernel/kptr_restrict /proc/sys/kernel/perf_event_paranoid [ /PERF-SESSION ] For a "comparison" (?) I attached two perf-reports - the newer one includes Willy's latest patchset. - Sedat - [1] https://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/prandom.git/log/?h=20200820-siphash-noise [2] https://github.com/linux-test-project/ltp/tree/master/runtest
# To display the perf.data header info, please use --header/--header-only
options.
#
#
# Total Lost Samples: 0
#
# Samples: 120K of event 'random:prandom_u32'
# Event count (approx.): 120473
#
# Overhead Command Shared Object Symbol
# ........ ............... ................. ...............
#
59.67% netstress [kernel.kallsyms] [k] prandom_u32
|
---prandom_u32
prandom_u32
|
|--33.21%--tcp_v4_connect
| __inet_stream_connect
| |
| |--22.14%--inet_stream_connect
| | __sys_connect
| | __x64_sys_connect
| | __noinstr_text_start
| | entry_SYSCALL_64_after_hwframe
| | __libc_connect
| | 0x65736e7500632e73
| |
| --11.07%--tcp_sendmsg_locked
| tcp_sendmsg
| __sys_sendto
| __x64_sys_sendto
| __noinstr_text_start
| entry_SYSCALL_64_after_hwframe
| __libc_sendto
|
|--16.61%--tcp_v6_connect
| __inet_stream_connect
| |
| |--11.07%--inet_stream_connect
| | __sys_connect
| | __x64_sys_connect
| | __noinstr_text_start
| | entry_SYSCALL_64_after_hwframe
| | __libc_connect
| | 0x65736e7500632e73
| |
| --5.54%--tcp_sendmsg_locked
| tcp_sendmsg
| __sys_sendto
| __x64_sys_sendto
| __noinstr_text_start
| entry_SYSCALL_64_after_hwframe
| __libc_sendto
|
|--6.64%--tcp_conn_request
| tcp_rcv_state_process
| |
| |--3.35%--tcp_v4_do_rcv
| | tcp_v4_rcv
| | ip_protocol_deliver_rcu
| | ip_local_deliver
| | ip_rcv
| | __netif_receive_skb
| | process_backlog
| | napi_poll
| | net_rx_action
| | __softirqentry_text_start
| | asm_call_on_stack
| | do_softirq_own_stack
| | |
| | |--2.05%--__irq_exit_rcu
| | | |
| | |
--2.04%--sysvec_apic_timer_interrupt
| | |
asm_sysvec_apic_timer_interrupt
| | |
| | --1.30%--do_softirq
| | __local_bh_enable_ip
| | |
| | --1.27%--ip_finish_output2
| | ip_output
| | __ip_queue_xmit
| | __tcp_transmit_skb
| | |
| |
--1.20%--tcp_write_xmit
| | |
| |
--1.02%--__tcp_push_pending_frames
| |
tcp_sendmsg_locked
| |
tcp_sendmsg
| |
|
| |
--0.63%--__sys_sendto
| |
__x64_sys_sendto
| |
__noinstr_text_start
| |
entry_SYSCALL_64_after_hwframe
| |
| --3.29%--tcp_v6_do_rcv
| tcp_v6_rcv
| ip6_protocol_deliver_rcu
| ip6_input
| ipv6_rcv
| __netif_receive_skb
| process_backlog
| napi_poll
| net_rx_action
| __softirqentry_text_start
| asm_call_on_stack
| do_softirq_own_stack
| |
| |--2.02%--__irq_exit_rcu
| | sysvec_apic_timer_interrupt
| | asm_sysvec_apic_timer_interrupt
| |
| --1.28%--do_softirq
| __local_bh_enable_ip
| |
| --1.23%--ip6_finish_output2
| ip6_output
| ip6_xmit
| inet6_csk_xmit
| __tcp_transmit_skb
| |
|
--1.14%--tcp_write_xmit
| |
|
--0.98%--__tcp_push_pending_frames
|
tcp_sendmsg_locked
|
tcp_sendmsg
|
|
|
--0.60%--__sys_sendto
|
__x64_sys_sendto
|
__noinstr_text_start
|
entry_SYSCALL_64_after_hwframe
|
--3.19%--tcp_v4_syn_recv_sock
tcp_v6_syn_recv_sock
|
--2.70%--tcp_try_fastopen
tcp_conn_request
tcp_rcv_state_process
tcp_v4_do_rcv
tcp_v4_rcv
ip_protocol_deliver_rcu
ip_local_deliver
ip_rcv
__netif_receive_skb
process_backlog
napi_poll
net_rx_action
__softirqentry_text_start
asm_call_on_stack
do_softirq_own_stack
|
|--1.71%--__irq_exit_rcu
| |
|
--1.70%--sysvec_apic_timer_interrupt
|
asm_sysvec_apic_timer_interrupt
|
--0.99%--do_softirq
__local_bh_enable_ip
|
--0.97%--ip_finish_output2
ip_output
__ip_queue_xmit
__tcp_transmit_skb
|
--0.92%--tcp_write_xmit
|
--0.78%--__tcp_push_pending_frames
tcp_sendmsg_locked
tcp_sendmsg
36.09% swapper [kernel.kallsyms] [k] prandom_u32
|
---prandom_u32
prandom_u32
|
|--23.84%--tcp_conn_request
| tcp_rcv_state_process
| |
| |--11.94%--tcp_v6_do_rcv
| | tcp_v6_rcv
| | ip6_protocol_deliver_rcu
| | ip6_input
| | ipv6_rcv
| | __netif_receive_skb
| | process_backlog
| | napi_poll
| | net_rx_action
| | __softirqentry_text_start
| | asm_call_on_stack
| | do_softirq_own_stack
| | __irq_exit_rcu
| | sysvec_apic_timer_interrupt
| | asm_sysvec_apic_timer_interrupt
| | |
| | |--10.49%--cpuidle_enter_state
| | | cpuidle_enter
| | | do_idle
| | | cpu_startup_entry
| | | |
| | | |--7.92%--secondary_startup_64
| | | |
| | | --2.57%--start_kernel
| | | secondary_startup_64
| | |
| | --0.92%--poll_idle
| | cpuidle_enter_state
| | cpuidle_enter
| | do_idle
| | cpu_startup_entry
| | |
| | --0.68%--secondary_startup_64
| |
| --11.90%--tcp_v4_do_rcv
| tcp_v4_rcv
| ip_protocol_deliver_rcu
| ip_local_deliver
| ip_rcv
| __netif_receive_skb
| process_backlog
| napi_poll
| net_rx_action
| __softirqentry_text_start
| asm_call_on_stack
| do_softirq_own_stack
| __irq_exit_rcu
| sysvec_apic_timer_interrupt
| asm_sysvec_apic_timer_interrupt
| |
| |--10.61%--cpuidle_enter_state
| | cpuidle_enter
| | do_idle
| | cpu_startup_entry
| | |
| | |--7.92%--secondary_startup_64
| | |
| | --2.69%--start_kernel
| | secondary_startup_64
| |
| --0.78%--poll_idle
| cpuidle_enter_state
| cpuidle_enter
| do_idle
| cpu_startup_entry
| |
| --0.60%--secondary_startup_64
|
--12.23%--tcp_v4_syn_recv_sock
tcp_v6_syn_recv_sock
|
|--7.45%--tcp_try_fastopen
| tcp_conn_request
| tcp_rcv_state_process
| tcp_v4_do_rcv
| tcp_v4_rcv
| ip_protocol_deliver_rcu
| ip_local_deliver
| ip_rcv
| __netif_receive_skb
| process_backlog
| napi_poll
| net_rx_action
| __softirqentry_text_start
| asm_call_on_stack
| do_softirq_own_stack
| __irq_exit_rcu
| sysvec_apic_timer_interrupt
| asm_sysvec_apic_timer_interrupt
| |
| --6.62%--cpuidle_enter_state
| cpuidle_enter
| do_idle
| cpu_startup_entry
| |
| |--4.85%--secondary_startup_64
| |
| --1.77%--start_kernel
| secondary_startup_64
|
--4.78%--tcp_check_req
tcp_v4_rcv
ip_protocol_deliver_rcu
ip_local_deliver
ip_rcv
__netif_receive_skb
process_backlog
napi_poll
net_rx_action
__softirqentry_text_start
asm_call_on_stack
do_softirq_own_stack
__irq_exit_rcu
sysvec_apic_timer_interrupt
asm_sysvec_apic_timer_interrupt
|
--4.53%--cpuidle_enter_state
cpuidle_enter
do_idle
cpu_startup_entry
|
|--3.48%--secondary_startup_64
|
--1.05%--start_kernel
secondary_startup_64
0.92% ksoftirqd/3 [kernel.kallsyms] [k] prandom_u32
|
---prandom_u32
prandom_u32
|
--0.59%--tcp_conn_request
tcp_rcv_state_process
0.90% ksoftirqd/1 [kernel.kallsyms] [k] prandom_u32
|
---prandom_u32
prandom_u32
|
--0.62%--tcp_conn_request
tcp_rcv_state_process
0.84% ksoftirqd/0 [kernel.kallsyms] [k] prandom_u32
|
---prandom_u32
prandom_u32
|
--0.56%--tcp_conn_request
tcp_rcv_state_process
0.77% ksoftirqd/2 [kernel.kallsyms] [k] prandom_u32
|
---prandom_u32
prandom_u32
|
--0.51%--tcp_conn_request
tcp_rcv_state_process
0.17% kworker/3:7-eve [kernel.kallsyms] [k] prandom_u32
0.15% kworker/1:2-eve [kernel.kallsyms] [k] prandom_u32
0.14% kworker/2:0-eve [kernel.kallsyms] [k] prandom_u32
0.13% kworker/0:5-eve [kernel.kallsyms] [k] prandom_u32
0.07% Xorg [kernel.kallsyms] [k] prandom_u32
0.04% avahi-daemon [kernel.kallsyms] [k] prandom_u32
0.04% ip [kernel.kallsyms] [k] prandom_u32
0.02% perf [kernel.kallsyms] [k] prandom_u32
0.01% rcu_sched [kernel.kallsyms] [k] prandom_u32
0.00% kworker/u16:2-i [kernel.kallsyms] [k] prandom_u32
0.00% ltp-pan [kernel.kallsyms] [k] prandom_u32
0.00% awk [kernel.kallsyms] [k] prandom_u32
0.00% mktemp [kernel.kallsyms] [k] prandom_u32
0.00% mysqld [kernel.kallsyms] [k] prandom_u32
0.00% systemd-journal [kernel.kallsyms] [k] prandom_u32
0.00% NetworkManager [kernel.kallsyms] [k] prandom_u32
0.00% QDBusConnection [kernel.kallsyms] [k] prandom_u32
0.00% gdbus [kernel.kallsyms] [k] prandom_u32
0.00% jbd2/sdc2-8 [kernel.kallsyms] [k] prandom_u32
0.00% kded5 [kernel.kallsyms] [k] prandom_u32
0.00% kworker/2:2-eve [kernel.kallsyms] [k] prandom_u32
0.00% kworker/3:0-eve [kernel.kallsyms] [k] prandom_u32
0.00% runltp [kernel.kallsyms] [k] prandom_u32
0.00% tcp_fastopen_ru [kernel.kallsyms] [k] prandom_u32
0.00% gnome-software [kernel.kallsyms] [k] prandom_u32
0.00% irq/35-iwlwifi [kernel.kallsyms] [k] prandom_u32
0.00% kworker/u16:1-p [kernel.kallsyms] [k] prandom_u32
0.00% org_kde_powerde [kernel.kallsyms] [k] prandom_u32
0.00% pool-org.gnome. [kernel.kallsyms] [k] prandom_u32
0.00% tst_net_iface_p [kernel.kallsyms] [k] prandom_u32
0.00% upowerd [kernel.kallsyms] [k] prandom_u32
0.00% xdg-desktop-por [kernel.kallsyms] [k] prandom_u32
# Samples: 0 of event 'dummy:HG'
# Event count (approx.): 0
#
# Overhead Command Shared Object Symbol
# ........ ....... ............. ......
#
#
# (Tip: Customize output of perf script with: perf script -F event,ip,sym)
#
# To display the perf.data header info, please use --header/--header-only
options.
#
#
# Total Lost Samples: 0
#
# Samples: 120K of event 'random:prandom_u32'
# Event count (approx.): 120542
#
# Overhead Command Shared Object Symbol
# ........ ............... ................. ...............
#
59.66% netstress [kernel.kallsyms] [k] prandom_u32
|
---prandom_u32
prandom_u32
|
|--33.20%--tcp_v4_connect
| __inet_stream_connect
| |
| |--22.13%--inet_stream_connect
| | __sys_connect
| | __x64_sys_connect
| | __noinstr_text_start
| | entry_SYSCALL_64_after_hwframe
| | __libc_connect
| | 0x65736e7500632e73
| |
| --11.07%--tcp_sendmsg_locked
| tcp_sendmsg
| __sys_sendto
| __x64_sys_sendto
| __noinstr_text_start
| entry_SYSCALL_64_after_hwframe
| __libc_sendto
|
|--16.60%--tcp_v6_connect
| __inet_stream_connect
| |
| |--11.07%--inet_stream_connect
| | __sys_connect
| | __x64_sys_connect
| | __noinstr_text_start
| | entry_SYSCALL_64_after_hwframe
| | __libc_connect
| | 0x65736e7500632e73
| |
| --5.53%--tcp_sendmsg_locked
| tcp_sendmsg
| __sys_sendto
| __x64_sys_sendto
| __noinstr_text_start
| entry_SYSCALL_64_after_hwframe
| __libc_sendto
|
|--6.69%--tcp_conn_request
| tcp_rcv_state_process
| |
| |--3.41%--tcp_v6_do_rcv
| | tcp_v6_rcv
| | ip6_protocol_deliver_rcu
| | ip6_input
| | ipv6_rcv
| | __netif_receive_skb
| | process_backlog
| | napi_poll
| | net_rx_action
| | __softirqentry_text_start
| | asm_call_on_stack
| | do_softirq_own_stack
| | |
| | |--2.15%--__irq_exit_rcu
| | | sysvec_apic_timer_interrupt
| | | asm_sysvec_apic_timer_interrupt
| | |
| | --1.26%--do_softirq
| | __local_bh_enable_ip
| | |
| | --1.22%--ip6_finish_output2
| | ip6_output
| | ip6_xmit
| | inet6_csk_xmit
| | __tcp_transmit_skb
| | |
| |
--1.13%--tcp_write_xmit
| | |
| |
--0.99%--__tcp_push_pending_frames
| |
tcp_sendmsg_locked
| |
tcp_sendmsg
| |
|
| |
--0.56%--__sys_sendto
| |
__x64_sys_sendto
| |
__noinstr_text_start
| |
entry_SYSCALL_64_after_hwframe
| |
| --3.27%--tcp_v4_do_rcv
| tcp_v4_rcv
| ip_protocol_deliver_rcu
| ip_local_deliver
| ip_rcv
| __netif_receive_skb
| process_backlog
| napi_poll
| net_rx_action
| __softirqentry_text_start
| asm_call_on_stack
| do_softirq_own_stack
| |
| |--1.94%--__irq_exit_rcu
| | sysvec_apic_timer_interrupt
| | asm_sysvec_apic_timer_interrupt
| |
| --1.33%--do_softirq
| __local_bh_enable_ip
| |
| --1.29%--ip_finish_output2
| ip_output
| __ip_queue_xmit
| __tcp_transmit_skb
| |
|
--1.21%--tcp_write_xmit
| |
|
--1.02%--__tcp_push_pending_frames
|
tcp_sendmsg_locked
|
tcp_sendmsg
|
|
|
--0.67%--__sys_sendto
|
__x64_sys_sendto
|
__noinstr_text_start
|
entry_SYSCALL_64_after_hwframe
|
--3.16%--tcp_v4_syn_recv_sock
tcp_v6_syn_recv_sock
|
--2.68%--tcp_try_fastopen
tcp_conn_request
tcp_rcv_state_process
tcp_v4_do_rcv
tcp_v4_rcv
ip_protocol_deliver_rcu
ip_local_deliver
ip_rcv
__netif_receive_skb
process_backlog
napi_poll
net_rx_action
__softirqentry_text_start
asm_call_on_stack
do_softirq_own_stack
|
|--1.62%--__irq_exit_rcu
| sysvec_apic_timer_interrupt
| asm_sysvec_apic_timer_interrupt
|
--1.07%--do_softirq
__local_bh_enable_ip
|
--1.03%--ip_finish_output2
ip_output
__ip_queue_xmit
__tcp_transmit_skb
|
--0.98%--tcp_write_xmit
|
--0.82%--__tcp_push_pending_frames
tcp_sendmsg_locked
tcp_sendmsg
|
--0.53%--__sys_sendto
__x64_sys_sendto
__noinstr_text_start
entry_SYSCALL_64_after_hwframe
36.30% swapper [kernel.kallsyms] [k] prandom_u32
|
---prandom_u32
prandom_u32
|
|--23.99%--tcp_conn_request
| tcp_rcv_state_process
| |
| |--12.11%--tcp_v4_do_rcv
| | tcp_v4_rcv
| | ip_protocol_deliver_rcu
| | ip_local_deliver
| | ip_rcv
| | __netif_receive_skb
| | process_backlog
| | napi_poll
| | net_rx_action
| | __softirqentry_text_start
| | asm_call_on_stack
| | do_softirq_own_stack
| | __irq_exit_rcu
| | sysvec_apic_timer_interrupt
| | asm_sysvec_apic_timer_interrupt
| | |
| | |--10.79%--cpuidle_enter_state
| | | cpuidle_enter
| | | do_idle
| | | cpu_startup_entry
| | | |
| | | |--8.20%--secondary_startup_64
| | | |
| | | --2.59%--start_kernel
| | | secondary_startup_64
| | |
| | --0.80%--poll_idle
| | cpuidle_enter_state
| | cpuidle_enter
| | do_idle
| | cpu_startup_entry
| | |
| | --0.62%--secondary_startup_64
| |
| --11.88%--tcp_v6_do_rcv
| tcp_v6_rcv
| ip6_protocol_deliver_rcu
| ip6_input
| ipv6_rcv
| __netif_receive_skb
| process_backlog
| napi_poll
| net_rx_action
| __softirqentry_text_start
| asm_call_on_stack
| do_softirq_own_stack
| __irq_exit_rcu
| sysvec_apic_timer_interrupt
| asm_sysvec_apic_timer_interrupt
| |
| |--10.46%--cpuidle_enter_state
| | cpuidle_enter
| | do_idle
| | cpu_startup_entry
| | |
| | |--7.92%--secondary_startup_64
| | |
| | --2.55%--start_kernel
| | secondary_startup_64
| |
| --0.89%--poll_idle
| cpuidle_enter_state
| cpuidle_enter
| do_idle
| cpu_startup_entry
| |
| --0.69%--secondary_startup_64
|
--12.30%--tcp_v4_syn_recv_sock
tcp_v6_syn_recv_sock
|
|--7.52%--tcp_try_fastopen
| tcp_conn_request
| tcp_rcv_state_process
| tcp_v4_do_rcv
| tcp_v4_rcv
| ip_protocol_deliver_rcu
| ip_local_deliver
| ip_rcv
| __netif_receive_skb
| process_backlog
| napi_poll
| net_rx_action
| __softirqentry_text_start
| asm_call_on_stack
| do_softirq_own_stack
| __irq_exit_rcu
| sysvec_apic_timer_interrupt
| asm_sysvec_apic_timer_interrupt
| |
| --6.67%--cpuidle_enter_state
| cpuidle_enter
| do_idle
| cpu_startup_entry
| |
| |--4.94%--secondary_startup_64
| |
| --1.73%--start_kernel
| secondary_startup_64
|
--4.79%--tcp_check_req
tcp_v4_rcv
ip_protocol_deliver_rcu
ip_local_deliver
ip_rcv
__netif_receive_skb
process_backlog
napi_poll
net_rx_action
__softirqentry_text_start
asm_call_on_stack
do_softirq_own_stack
__irq_exit_rcu
sysvec_apic_timer_interrupt
asm_sysvec_apic_timer_interrupt
|
--4.52%--cpuidle_enter_state
cpuidle_enter
do_idle
cpu_startup_entry
|
|--3.59%--secondary_startup_64
|
--0.93%--start_kernel
secondary_startup_64
0.89% ksoftirqd/3 [kernel.kallsyms] [k] prandom_u32
|
---prandom_u32
prandom_u32
|
--0.58%--tcp_conn_request
tcp_rcv_state_process
0.87% ksoftirqd/1 [kernel.kallsyms] [k] prandom_u32
|
---prandom_u32
prandom_u32
|
--0.58%--tcp_conn_request
tcp_rcv_state_process
0.76% ksoftirqd/0 [kernel.kallsyms] [k] prandom_u32
|
---prandom_u32
prandom_u32
|
--0.52%--tcp_conn_request
tcp_rcv_state_process
0.71% ksoftirqd/2 [kernel.kallsyms] [k] prandom_u32
|
---prandom_u32
prandom_u32
0.16% kworker/3:3-eve [kernel.kallsyms] [k] prandom_u32
0.14% kworker/1:2-eve [kernel.kallsyms] [k] prandom_u32
0.12% Xorg [kernel.kallsyms] [k] prandom_u32
0.12% kworker/0:5-eve [kernel.kallsyms] [k] prandom_u32
0.11% kworker/2:0-eve [kernel.kallsyms] [k] prandom_u32
0.03% avahi-daemon [kernel.kallsyms] [k] prandom_u32
0.03% ip [kernel.kallsyms] [k] prandom_u32
0.03% systemd-udevd [kernel.kallsyms] [k] prandom_u32
0.02% perf [kernel.kallsyms] [k] prandom_u32
0.01% rcu_sched [kernel.kallsyms] [k] prandom_u32
0.00% ltp-pan [kernel.kallsyms] [k] prandom_u32
0.00% NetworkManager [kernel.kallsyms] [k] prandom_u32
0.00% irq/35-iwlwifi [kernel.kallsyms] [k] prandom_u32
0.00% mktemp [kernel.kallsyms] [k] prandom_u32
0.00% mysqld [kernel.kallsyms] [k] prandom_u32
0.00% tcp_fastopen_ru [kernel.kallsyms] [k] prandom_u32
0.00% DiscoverNotifie [kernel.kallsyms] [k] prandom_u32
0.00% QSGRenderThread [kernel.kallsyms] [k] prandom_u32
0.00% kworker/1:0-eve [kernel.kallsyms] [k] prandom_u32
0.00% migration/3 [kernel.kallsyms] [k] prandom_u32
0.00% ns_create [kernel.kallsyms] [k] prandom_u32
0.00% ns_ifmove [kernel.kallsyms] [k] prandom_u32
0.00% runltp [kernel.kallsyms] [k] prandom_u32
0.00% QXcbEventQueue [kernel.kallsyms] [k] prandom_u32
0.00% Thread (pooled) [kernel.kallsyms] [k] prandom_u32
0.00% akonadi_followu [kernel.kallsyms] [k] prandom_u32
0.00% gnome-software [kernel.kallsyms] [k] prandom_u32
0.00% ln [kernel.kallsyms] [k] prandom_u32
0.00% mkdir [kernel.kallsyms] [k] prandom_u32
# Samples: 0 of event 'dummy:HG'
# Event count (approx.): 0
#
# Overhead Command Shared Object Symbol
# ........ ....... ............. ......
#
#
# (Tip: Generate a script for your data: perf script -g <lang>)
#
