From: Sedat Dilek <sedat.dilek@gmail.com>
To: Willy Tarreau <w@1wt.eu>
Cc: Eric Dumazet <edumazet@google.com>, George Spelvin <lkml@sdf.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Amit Klein <aksecurity@gmail.com>,
"Jason A. Donenfeld" <Jason@zx2c4.com>,
Andy Lutomirski <luto@kernel.org>,
Kees Cook <keescook@chromium.org>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
netdev@vger.kernel.org
Subject: Re: [DRAFT PATCH] random32: make prandom_u32() output unpredictable
Date: Thu, 20 Aug 2020 14:08:53 +0200 [thread overview]
Message-ID: <CA+icZUX0QTac1DiLtk6Rb_o9r6d1LCZVaMRoDGt5AmipajHayg@mail.gmail.com> (raw)
In-Reply-To: <20200820080503.GC21526@1wt.eu>
[-- Attachment #1: Type: text/plain, Size: 2348 bytes --]
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
[-- Attachment #2: perf-report-2020-08-19.txt --]
[-- Type: text/plain, Size: 21043 bytes --]
# 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)
#
[-- Attachment #3: perf-report-2020-08-20.txt --]
[-- Type: text/plain, Size: 21103 bytes --]
# 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>)
#
next prev parent reply other threads:[~2020-08-20 12:10 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CA+icZUVnsmf1kXPYFYufStQ_MxnLuxL+EWfDS2wQy1VbAEMwkA@mail.gmail.com>
2020-08-09 21:10 ` [DRAFT PATCH] random32: make prandom_u32() output unpredictable Sedat Dilek
[not found] ` <20200809235412.GD25124@SDF.ORG>
[not found] ` <20200810034948.GB8262@1wt.eu>
[not found] ` <20200811053455.GH25124@SDF.ORG>
[not found] ` <20200811054328.GD9456@1wt.eu>
[not found] ` <20200811062814.GI25124@SDF.ORG>
[not found] ` <20200811074538.GA9523@1wt.eu>
2020-08-11 10:51 ` Sedat Dilek
2020-08-11 11:01 ` Sedat Dilek
2020-08-12 3:21 ` Willy Tarreau
2020-08-13 7:53 ` Sedat Dilek
2020-08-13 8:06 ` Willy Tarreau
2020-08-13 8:13 ` Sedat Dilek
2020-08-13 8:27 ` Sedat Dilek
2020-08-13 14:00 ` Eric Dumazet
2020-08-13 16:02 ` Sedat Dilek
2020-08-14 15:32 ` Sedat Dilek
2020-08-14 16:05 ` Willy Tarreau
2020-08-14 16:17 ` Sedat Dilek
2020-08-16 15:01 ` Willy Tarreau
2020-08-16 16:48 ` Sedat Dilek
2020-08-20 3:05 ` Sedat Dilek
2020-08-20 4:33 ` Willy Tarreau
2020-08-20 4:42 ` Sedat Dilek
2020-08-20 6:08 ` Willy Tarreau
2020-08-20 6:58 ` Willy Tarreau
2020-08-20 8:05 ` Willy Tarreau
2020-08-20 12:08 ` Sedat Dilek [this message]
[not found] ` <CANEQ_+L+22Hkdqf38Zr0bfq16fcL1Ax2X9fToXV_niHKXCB8aA@mail.gmail.com>
2020-08-27 1:09 ` Willy Tarreau
2020-08-27 7:08 ` Sedat Dilek
2020-08-08 15:26 Flaw in "random32: update the net random state on interrupt and activity" George Spelvin
2020-08-09 6:57 ` [DRAFT PATCH] random32: make prandom_u32() output unpredictable George Spelvin
2020-08-09 9:38 ` Willy Tarreau
2020-08-09 17:06 ` George Spelvin
2020-08-09 17:33 ` Willy Tarreau
2020-08-09 18:30 ` George Spelvin
2020-08-09 19:16 ` Willy Tarreau
2020-08-10 11:47 ` Willy Tarreau
2020-08-10 12:01 ` David Laight
2020-08-10 14:48 ` Willy Tarreau
2020-08-10 12:03 ` Florian Westphal
2020-08-10 14:53 ` Willy Tarreau
2020-08-10 16:31 ` Linus Torvalds
2020-08-10 16:58 ` Willy Tarreau
2020-08-10 17:45 ` Linus Torvalds
2020-08-10 18:01 ` Willy Tarreau
2020-08-10 21:04 ` Willy Tarreau
2020-08-11 5:26 ` George Spelvin
2020-08-11 5:37 ` Willy Tarreau
2020-08-11 3:47 ` George Spelvin
2020-08-11 3:58 ` Willy Tarreau
[not found] ` <fdbc7d7d-cba2-ef94-9bde-b3ccae0cfaac@gmail.com>
2020-08-09 21:10 ` Marc Plumb
2020-08-09 21:48 ` Linus Torvalds
2020-08-09 13:50 ` Randy Dunlap
[not found] ` <CANEQ_++a4YcwQQ2XhuguTono9=RxbSRVsMw08zLWBWJ_wxG2AQ@mail.gmail.com>
2020-08-09 16:08 ` George Spelvin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CA+icZUX0QTac1DiLtk6Rb_o9r6d1LCZVaMRoDGt5AmipajHayg@mail.gmail.com \
--to=sedat.dilek@gmail.com \
--cc=Jason@zx2c4.com \
--cc=aksecurity@gmail.com \
--cc=edumazet@google.com \
--cc=keescook@chromium.org \
--cc=lkml@sdf.org \
--cc=luto@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
--cc=w@1wt.eu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).