RunCL Reference

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RunCL Reference#

RunCL is a command-line tool to build, execute, and debug OpenCL programs with an easy-to-use interface.

RunCL Usage#

Usage: runcl [platform-options] [-I<include-dir>] [[-D<name>=<value>] ...]
            <kernel.[cl|elf]> [kernel-arguments]
            <arguments> <num_work_items>[/<work_group_size>]

[platform-options]
    -v                    verbose
    -gpu                  use GPU device (default)
    -cpu                  use CPU device
    -device <name>|#<num> use specified device
    -bo <string>          OpenCL build option

[kernel-options]
    -k <kernel-name>      kernel name
    -p                    use persistence flag
    -r[link] <exec-count> execution count
    -w <msec>             waiting time
    -dumpcl               dump OpenCL code after pre-processing
    -dumpilisa            dump ISA of kernel and show ISA statistics
    -dumpelf              dump ELF binary

The <arguments> should be given in the order as required by the kernel.

  • For value arguments use:

iv#<int/float>[,<int/float>...] or
iv:<file> (e.g., iv#10.2,10,0x10)

  • For local memory use:

lm#<local-memory-size> (e.g., lm#8192)

  • For input buffer use:

if[#<buffer-size>]:[<file>][#[[<checksum>][/<file>[@<offset>#<end>]]]]
(e.g., if:input.bin)

  • For output (or RW) buffer:

of[#<buffer-size>]:[#]<file>[@<ofile>][#[[<checksum>][/[+<float-tolerance>]<file>[@<offset>#<end>]]]]
(e.g., of#16384:output.bin)

  • For input image use:

ii#<width>x<height>,<stride>,<u8/s16/u16/bgra/rgba/argb>:<file>
(e.g., ii#1920x1080,7680,bgra:screen1920x1080.rgb)

  • For output image use:

oi#<width>x<height>,<stride>,<u8/s16/u16/bgra/rgba/argb>:<file>
(e.g., oi#1920x1080,7680,bgra:screen1920x1080.rgb

Example#

% cat subtract.cl
__kernel __attribute__((reqd_work_group_size(64, 1, 1)))
void subtract(
    __global float * a,
    __global float * b,
    __global float * c,
    uint count)
{
    uint id = get_global_id(0);
    if(id < count) {
        c[id] = a[id] - b[id];
    }
}

% runcl subtract.cl if#4000:a.f32 if#4000:b.f32 of#4000:#out.f32 iv#1000 1024,1,1/64,1,1
OK: Using GPU device#0 [...]
OK: COMPILATION on GPU took   0.1268 sec for subtract
OK: kernel subtract info reqd_work_group_size(64,1,1)
OK: kernel subtract info work_group_size(256)
OK: kernel subtract info local_mem_size(0)
OK: kernel subtract info local_private_size(0)
OK: RUN SUCCESSFUL on GPU work:{1024,1,1}/{64,1,1} [  0.00025 sec/exec] subtract (1st execution)
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