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Check whether hyperthreading is enabled or not.

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Since calculating the recommended value for "wsrep_slave_threads" using the number of physical cores is best practice for Intel CPUs where hyperthreading is activated.
This commit is contained in:
Christoph Hansen 2017-03-13 17:22:05 +01:00 committed by GitHub
parent e44c29bf23
commit b7e1a99240
1 changed files with 10 additions and 4 deletions
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14
mysqltuner.pl
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@ -300,6 +300,12 @@ sub infoprinthcmd {
infoprintcmd "$_[1]";
}
# Calculates the number of phyiscal cores considering HyperThreading
sub cpu_cores {
my $cntCPU = `awk -F: '/^core id/ && !P[\$2] { CORES++; P[\$2]=1 }; /^physical id/ && !N[\$2] { CPUs++; N[\$2]=1 }; END { print CPUs*CORES }' /proc/cpuinfo`;
return ( $cntCPU == 0 ? `nproc` : $cntCPU );
}
# Calculates the parameter passed in bytes, then rounds it to one decimal place
sub hr_bytes {
my $num = shift;
@ -1518,8 +1524,8 @@ sub get_system_info {
else {
badprint "Internet : Disconnected";
}
$result{'OS'}{'NbCore'} = `nproc`;
infoprint "Number of Core CPU : " . `nproc`;
$result{'OS'}{'NbCore'} = cpu_cores;
infoprint "Number of Core CPU : " . cpu_cores;
$result{'OS'}{'Type'} = `uname -o`;
infoprint "Operating System Type : " . infocmd_one "uname -o";
$result{'OS'}{'Kernel'} = `uname -r`;
@ -5048,8 +5054,8 @@ group by c.table_schema,c.table_name
having sum(if(c.column_key in ('PRI','UNI'), 1,0)) = 0"
);
if ( get_wsrep_option('wsrep_slave_threads') > `nproc` * 4
or get_wsrep_option('wsrep_slave_threads') < `nproc` * 3 )
if ( get_wsrep_option('wsrep_slave_threads') > cpu_cores * 4
or get_wsrep_option('wsrep_slave_threads') < cpu_cores * 3 )
{
badprint
"wsrep_slave_threads is not equal to 3 or 4 times number of CPU(s)";