Garak: /* Bc as CPU benchmark for multicore cpu */

2022-09-19T18:17:15Z

Bc as CPU benchmark for multicore cpu

Garak: Created page with "== Bc as CPU benchmark for multicore cpu == Referring to this http://tuxshell.blogspot.com/2009/08/bc-as-cpu-benchmark.html post, I figured out the simple way how to test spe..."

2022-09-19T18:16:49Z

Created page with "== Bc as CPU benchmark for multicore cpu == Referring to this http://tuxshell.blogspot.com/2009/08/bc-as-cpu-benchmark.html post, I figured out the simple way how to test spe..."

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== Bc as CPU benchmark for multicore cpu ==

Referring to this http://tuxshell.blogspot.com/2009/08/bc-as-cpu-benchmark.html post, I figured out the simple way how to test speed of multicore cpu system or multi cpu system. This command:

$ time echo "scale=5000; a(1)*4" | bc -l

will only be executed on one CPU core. However we can use GNU parallel command to execute it many times on multicore cpu. First we create benchmark script b.sh as follows:

#!/bin/bash
echo "scale=$1; a(1)*4" | bc -l

The first argument is number of digits to calculate. Now we can run in parallel (4 times) this way

$ time parallel ./b.sh ::: 2000 2000 2000 2000

We can determine the number of cores with this command:

$ cat /proc/cpuinfo | grep processor | wc -l
4

If your cpu supports hyper threading - this will give you the number of logical cores, not only the physical ones

@@ Line 2: / Line 2: @@
 Referring to this http://tuxshell.blogspot.com/2009/08/bc-as-cpu-benchmark.html post, I figured out the simple way how to test speed of multicore cpu system or multi cpu system. This command:
+<pre>
 $ time echo "scale=5000; a(1)*4" | bc -l
+</pre>
 will only be executed on one CPU core. However we can use GNU parallel command to execute it many times on multicore cpu. First we create benchmark script b.sh  as follows:
+<pre>
 #!/bin/bash
 echo "scale=$1; a(1)*4" | bc -l
+</pre>
 The first argument is number of digits to calculate. Now we can run in parallel (4 times) this way
+<pre>
 $ time parallel ./b.sh ::: 2000 2000 2000 2000
+</pre>
 We can determine the number of cores with this command:
+<pre>
 $ cat /proc/cpuinfo  | grep processor | wc -l
+</pre>
 If your cpu supports hyper threading - this will give you the number of logical cores, not only the physical ones

ZhoubaWiki:Bc-cpu-benchl - Revision history

Garak: /* Bc as CPU benchmark for multicore cpu */

Garak: Created page with "== Bc as CPU benchmark for multicore cpu == Referring to this http://tuxshell.blogspot.com/2009/08/bc-as-cpu-benchmark.html post, I figured out the simple way how to test spe..."