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OpenSuSE 安装bpftrace - 操作系统(内核) - 清泛网 - 专注C++内核技术
...CE_BTF [default: none] BTF file
EXAMPLES:
bpftrace -l '*sleep*'
list probes containing "sleep"
bpftrace -e 'kprobe:do_nanosleep { printf("PID %d sleeping...\n", pid); }'
trace processes calling sleep
bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @[comm] = count(); }...
OpenSuSE 安装bpftrace - 操作系统(内核) - 清泛网移动版 - 专注C++内核技术
...CE_BTF [default: none] BTF file
EXAMPLES:
bpftrace -l '*sleep*'
list probes containing "sleep"
bpftrace -e 'kprobe:do_nanosleep { printf("PID %d sleeping...\n", pid); }'
trace processes calling sleep
bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @[comm] = count(); }...
OpenSuSE 安装bpftrace - 操作系统(内核) - 清泛网 - 专注C++内核技术
...CE_BTF [default: none] BTF file
EXAMPLES:
bpftrace -l '*sleep*'
list probes containing "sleep"
bpftrace -e 'kprobe:do_nanosleep { printf("PID %d sleeping...\n", pid); }'
trace processes calling sleep
bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @[comm] = count(); }...
OpenSuSE 安装bpftrace - 操作系统(内核) - 清泛网移动版 - 专注C++内核技术
...CE_BTF [default: none] BTF file
EXAMPLES:
bpftrace -l '*sleep*'
list probes containing "sleep"
bpftrace -e 'kprobe:do_nanosleep { printf("PID %d sleeping...\n", pid); }'
trace processes calling sleep
bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @[comm] = count(); }...
OpenSuSE 安装bpftrace - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...CE_BTF [default: none] BTF file
EXAMPLES:
bpftrace -l '*sleep*'
list probes containing "sleep"
bpftrace -e 'kprobe:do_nanosleep { printf("PID %d sleeping...\n", pid); }'
trace processes calling sleep
bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @[comm] = count(); }...
OpenSuSE 安装bpftrace - 操作系统(内核) - 清泛网移动版 - 专注C/C++及内核技术
...CE_BTF [default: none] BTF file
EXAMPLES:
bpftrace -l '*sleep*'
list probes containing "sleep"
bpftrace -e 'kprobe:do_nanosleep { printf("PID %d sleeping...\n", pid); }'
trace processes calling sleep
bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @[comm] = count(); }...
OpenSuSE 安装bpftrace - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...CE_BTF [default: none] BTF file
EXAMPLES:
bpftrace -l '*sleep*'
list probes containing "sleep"
bpftrace -e 'kprobe:do_nanosleep { printf("PID %d sleeping...\n", pid); }'
trace processes calling sleep
bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @[comm] = count(); }...
Python: Making a beep noise
...more pythonic manner :
import os
beep = lambda x: os.system("echo -n '\a';sleep 0.2;" * x)
beep(3)
Notes :
the sleep value (here 0.2), depends on the length (seconds) of your default beep sound
I choosed to use os.system rather then subprocess.Popen for simplicity (it could be bad)
the '-n' for...
What does multicore assembly language look like?
...code from address 0xfffffff0. All the other threads start up in a special sleep state called Wait-for-SIPI. As part of its initialization, the primary thread sends a special inter-processor-interrupt (IPI) over the APIC called a SIPI (Startup IPI) to each thread that is in WFS. The SIPI contains ...
Timeout command on Mac OS X?
...l fail after 1 second, and shows non zero exit code result
$ timeout 1 "sleep 2" 2> /dev/null ; echo \$?
142
# Will succeed, and return exit code of 0.
$ timeout 1 sleep 0.5; echo \$?
0
$ timeout 1 bash -c 'echo "hi" && sleep 2 && echo "bye"' 2> /dev/null; e...