| Server IP : 104.21.93.65 / Your IP : 104.23.243.51 Web Server : Apache System : Linux server.localhost.com 6.8.0-85-generic #85-Ubuntu SMP PREEMPT_DYNAMIC Thu Sep 18 15:26:59 UTC 2025 x86_64 User : pahana ( 1029) PHP Version : 7.4.33 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : OFF Directory : /usr/share/doc/pv/ |
Upload File : |
#!/bin/bash
#
# Benchmark the read/write performance of pv by looking at the number of
# read() and write() calls and the average amount of data transferred each
# time, as suggested by Ville Herva <[email protected]>.
#
test_input=$(mktemp /tmp/pvbench1XXXXXX)
strace_output=$(mktemp /tmp/pvbench2XXXXXX)
trap 'rm -f ${test_input} ${strace_output}' EXIT
pv=${pv:-./pv}
test -x "${pv}" || pv="pv"
dd if=/dev/zero of="${test_input}" bs=1k count=1k >/dev/null 2>&1
echo -e "Buf(k)\tRate(k)\tReads\tRsize\tWrites\tWsize"
for ((buffer=100; buffer<=1000; buffer+=100)); do
for ((rate=100; rate<=1000; rate+=100)); do
rateparm="-L ${rate}k"
test ${rate} -eq 0 && rateparm=""
strace -tt -o "${strace_output}" \
"${pv}" "${rateparm}" -B "${buffer}k" \
-f < "${test_input}" > /dev/null 2>&1
rdata=$(
awk '$2~/^read\(0,/{c++;t+=$NF}END{print c "\t" t/c}' \
"${strace_output}"
)
wdata=$(
awk '$2~/^write\(1,/{c++;t+=$NF}END{print c "\t" t/c}' \
"${strace_output}"
)
echo -e "${buffer}\t${rate}\t${rdata}\t${wdata}"
done
done
# EOF