31 May, 2019
1 commit
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of version 2 of the gnu general public license as
published by the free software foundationextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 107 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Allison Randal
Reviewed-by: Richard Fontana
Reviewed-by: Steve Winslow
Reviewed-by: Alexios Zavras
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190528171438.615055994@linutronix.de
Signed-off-by: Greg Kroah-Hartman
05 Jul, 2018
1 commit
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test_task_rename() and test_urandom_read()
can be failed during write() and read(),
So check the result of them.Reviewed-by: David Laight
Signed-off-by: Taeung Song
Acked-by: David S. Miller
Signed-off-by: Daniel Borkmann
15 May, 2018
1 commit
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There are two files in the tree called libbpf.h which is becoming
problematic. Most samples don't actually need the local libbpf.h
they simply include it to get to bpf/bpf.h. Include bpf/bpf.h
directly instead.Signed-off-by: Jakub Kicinski
Acked-by: Jesper Dangaard Brouer
Signed-off-by: Alexei Starovoitov
29 Mar, 2018
1 commit
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add empty raw_tracepoint bpf program to test overhead similar
to kprobe and traditional tracepoint testsSigned-off-by: Alexei Starovoitov
Signed-off-by: Daniel Borkmann
08 Apr, 2016
1 commit
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the first microbenchmark does
fd=open("/proc/self/comm");
for() {
write(fd, "test");
}
and on 4 cpus in parallel:
writes per sec
base (no tracepoints, no kprobes) 930k
with kprobe at __set_task_comm() 420k
with tracepoint at task:task_rename 730kFor kprobe + full bpf program manully fetches oldcomm, newcomm via bpf_probe_read.
For tracepint bpf program does nothing, since arguments are copied by tracepoint.2nd microbenchmark does:
fd=open("/dev/urandom");
for() {
read(fd, buf);
}
and on 4 cpus in parallel:
reads per sec
base (no tracepoints, no kprobes) 300k
with kprobe at urandom_read() 279k
with tracepoint at random:urandom_read 290kbpf progs attached to kprobe and tracepoint are noop.
Signed-off-by: Alexei Starovoitov
Signed-off-by: David S. Miller
