Drazen Urch
7bd1550195
* Checkpoint * cpu cycle ffi * Rename * mixnode feature * Bundle libcpucycles
457 lines
29 KiB
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457 lines
29 KiB
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<title>
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Counters</title>
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libcpucycles
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<div class="navt away"><a href=index.html>Intro</a>
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</div><div class="navt away"><a href=download.html>Download</a>
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</div><div class="navt away"><a href=install.html>Install</a>
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</div><div class="navt away"><a href=api.html>API</a>
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</div><div class="navt here">Counters
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</div><div class="navt away"><a href=selection.html>Selection</a>
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</div><div class="navt away"><a href=security.html>Security</a>
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</div></div>
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<div class=main>
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<p>Currently libcpucycles supports the following cycle counters. Some
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cycle counters are actually other forms of counters that libcpucycles
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scales to imitate a cycle counter. There is
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<a href="selection.html">separate documentation</a>
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for how libcpucycles makes a choice of cycle counter. See also
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<a href="security.html">security considerations</a> regarding enabling or disabling
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counters and regarding Turbo Boost.</p>
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<p><code>amd64-pmc</code>: Requires a 64-bit Intel/AMD platform. Requires the Linux
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perf_event interface. Accesses a cycle counter through RDPMC. Requires
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<code>/proc/sys/kernel/perf_event_paranoid</code> to be at most 2 for user-level
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RDPMC access. This counter runs at the clock frequency of the CPU core.</p>
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<p><code>amd64-tsc</code>, <code>amd64-tscasm</code>: Requires a 64-bit Intel/AMD platform.
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Requires RDTSC to be enabled, which it is by default. Uses RDTSC to
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access the CPU's time-stamp counter. On current CPUs, this is an
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off-core clock rather than a cycle counter, but it is typically a very
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fast off-core clock, making it adequate for seeing cycle counts if
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overclocking and underclocking are disabled. The difference between
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<code>tsc</code> and <code>tscasm</code> is that <code>tsc</code> uses the compiler's <code>__rdtsc()</code> while
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<code>tscasm</code> uses inline assembly.</p>
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<p><code>arm32-cortex</code>: Requires a 32-bit ARMv7-A platform. Uses
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<code>mrc p15, 0, %0, c9, c13, 0</code> to read the cycle counter. Requires user
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access to the cycle counter, which is not enabled by default but can be
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enabled under Linux via
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<a href="https://github.com/thoughtpolice/enable_arm_pmu">a kernel module</a>.
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This counter is natively 32 bits, but libcpucycles watches how the
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counter and <code>gettimeofday</code> increase to compute a 64-bit extension of the
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counter.</p>
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<p><code>arm64-pmc</code>: Requires a 64-bit ARMv8-A platform. Uses
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<code>mrs %0, PMCCNTR_EL0</code> to read the cycle counter. Requires user access
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to the cycle counter, which is not enabled by default but can be enabled
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under Linux via
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<a href="https://github.com/rdolbeau/enable_arm_pmu">a kernel module</a>.</p>
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<p><code>arm64-vct</code>: Requires a 64-bit ARMv8-A platform. Uses
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<code>mrs %0, CNTVCT_EL0</code> to read a "virtual count" timer. This is an
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off-core clock, typically running at 24MHz. Results are scaled by
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libcpucycles.</p>
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<p><code>mips64-cc</code>: Requires a 64-bit MIPS platform. (Maybe the same code would
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also work as <code>mips32-cc</code>, but this has not been tested yet.) Uses RDHWR
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to read the hardware cycle counter (hardware register 2 times a constant
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scale factor in hardware register 3). This counter is natively 32 bits,
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but libcpucycles watches how the counter and <code>gettimeofday</code> increase to
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compute a 64-bit extension of the counter.</p>
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<p><code>ppc32-mftb</code>: Requires a 32-bit PowerPC platform. Uses <code>mftb</code> and
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<code>mftbu</code> to read the "time base". This is an off-core clock, typically
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running at 24MHz.</p>
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<p><code>ppc64-mftb</code>: Requires a 64-bit PowerPC platform. Uses <code>mftb</code> and
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<code>mftbu</code> to read the "time base". This is an off-core clock, typically
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running at 24MHz.</p>
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<p><code>riscv32-rdcycle</code>: Requires a 32-bit RISC-V platform. Uses <code>rdcycle</code>
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and <code>rdcycleh</code> to read a cycle counter.</p>
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<p><code>riscv64-rdcycle</code>: Requires a 64-bit RISC-V platform. Uses <code>rdcycle</code>
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to read a cycle counter.</p>
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<p><code>s390x-stckf</code>: Requires a 64-bit z/Architecture platform. Uses <code>stckf</code>
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to read the TOD clock, which is documented to run at 4096MHz. On the
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z15, this looks like a doubling of an off-core 2048MHz clock. Results
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are scaled by libcpucycles.</p>
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<p><code>sparc64-rdtick</code>: Requires a 64-bit SPARC platform. Uses <code>rd %tick</code>
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to read a cycle counter.</p>
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<p><code>x86-tsc</code>, <code>x86-tscasm</code>: Same as <code>amd64-tsc</code> and <code>amd64-tscasm</code>, but
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for 32-bit Intel/AMD platforms instead of 64-bit Intel/AMD platforms.</p>
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<p><code>default-gettimeofday</code>: Reasonably portable. Resolution is limited to 1
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microsecond. Results are scaled by libcpucycles.</p>
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<p><code>default-mach</code>: Requires an OS with <code>mach_absolute_time()</code>. Typically
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runs at 24MHz. Results are scaled by libcpucycles.</p>
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<p><code>default-monotonic</code>: Requires <code>CLOCK_MONOTONIC</code>. Reasonably portable,
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although might fail on older systems where <code>default-gettimeofday</code> works.
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Resolution is limited to 1 nanosecond. Can be almost as good as a cycle
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counter, or orders of magnitude worse, depending on the OS and CPU.
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Results are scaled by libcpucycles.</p>
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<p><code>default-perfevent</code>: Requires the Linux <code>perf_event</code> interface, and a
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CPU where <code>perf_event</code> supports <code>PERF_COUNT_HW_CPU_CYCLES</code>. Similar
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variations in quality to <code>default-monotonic</code>, without the 1-nanosecond
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limitation.</p>
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<p><code>default-zero</code>: The horrifying last resort if nothing else works.</p>
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<h2>Examples</h2>
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<p>These are examples of <code>cpucycles-info</code> output on various machines. The
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machines named <code>gcc*</code> are from the
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<a href="https://gcc.gnu.org/wiki/CompileFarm">GCC Compile Farm</a>.</p>
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<p>A <code>median</code> line saying, e.g., <code>47 +47+28+0+2-5+0+2-5...</code> means that the
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differences between adjacent cycle counts were 47+47, 47+28, 47+0, 47+2,
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47−5, 47+0, 47+2, 47−5, etc., with median difference 47. The first few
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differences are typically larger because of cache effects.</p>
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<p><code>pi3aplus</code>,
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Broadcom BCM2837B0:</p>
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<pre><code>cpucycles version 20230105
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cpucycles tracesetup 0 arm64-pmc precision 9 scaling 1.000000 only32 0
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cpucycles tracesetup 1 arm64-vct precision 0 scaling 0.000000 only32 0
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cpucycles tracesetup 2 default-perfevent precision 189 scaling 1.000000 only32 0
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cpucycles tracesetup 3 default-mach precision 0 scaling 0.000000 only32 0
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cpucycles tracesetup 4 default-monotonic precision 272 scaling 1.400000 only32 0
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cpucycles tracesetup 5 default-gettimeofday precision 1600 scaling 1400.000000 only32 0
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cpucycles tracesetup 6 default-zero precision 0 scaling 0.000000 only32 0
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cpucycles persecond 1400000000
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cpucycles implementation arm64-pmc
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cpucycles median 10 +10+8+3+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0
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cpucycles observed persecond 1032000000...4224666667 with 1024 loops 4 microseconds
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cpucycles observed persecond 1286000000...1756000000 with 2048 loops 7 microseconds
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cpucycles observed persecond 1368266666...1598000000 with 4096 loops 14 microseconds
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cpucycles observed persecond 1366700000...1473428572 with 8192 loops 29 microseconds
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cpucycles observed persecond 1366100000...1417534483 with 16384 loops 59 microseconds
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cpucycles observed persecond 1332739837...1357132232 with 32768 loops 122 microseconds
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cpucycles observed persecond 1354483471...1366945834 with 65536 loops 241 microseconds
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cpucycles observed persecond 1385684989...1392195330 with 131072 loops 472 microseconds
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cpucycles observed persecond 1347223021...1350328528 with 262144 loops 972 microseconds
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cpucycles observed persecond 1375460125...1377069853 with 524288 loops 1905 microseconds
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cpucycles observed persecond 1376527697...1377335961 with 1048576 loops 3808 microseconds
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</code></pre>
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<p><code>bblack</code>,
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TI Sitara XAM3359AZCZ100:</p>
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<pre><code>cpucycles version 20230105
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cpucycles tracesetup 0 arm32-cortex precision 8 scaling 1.000000 only32 1
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cpucycles tracesetup 1 default-perfevent precision 0 scaling 0.000000 only32 0
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cpucycles tracesetup 2 default-mach precision 0 scaling 0.000000 only32 0
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cpucycles tracesetup 3 default-monotonic precision 1283 scaling 1.000000 only32 0
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cpucycles tracesetup 4 default-gettimeofday precision 1200 scaling 1000.000000 only32 0
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cpucycles tracesetup 5 default-zero precision 0 scaling 0.000000 only32 0
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cpucycles persecond 1000000000
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cpucycles implementation arm32-cortex
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cpucycles median 1260 +1506+62+31+7+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+13+7+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0
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cpucycles observed persecond 622181818...2101888889 with 1024 loops 10 microseconds
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cpucycles observed persecond 806133333...1492615385 with 2048 loops 14 microseconds
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cpucycles observed persecond 879880000...1232565218 with 4096 loops 24 microseconds
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cpucycles observed persecond 939577777...1130581396 with 8192 loops 44 microseconds
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cpucycles observed persecond 956954022...1050047059 with 16384 loops 86 microseconds
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cpucycles observed persecond 982878542...1020685715 with 32768 loops 246 microseconds
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cpucycles observed persecond 988105105...1012217523 with 65536 loops 332 microseconds
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cpucycles observed persecond 993752077...1007159723 with 131072 loops 721 microseconds
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cpucycles observed persecond 995364296...1004009448 with 262144 loops 1377 microseconds
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cpucycles observed persecond 998216306...1001821536 with 524288 loops 2685 microseconds
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cpucycles observed persecond 998991848...1000914196 with 1048576 loops 5397 microseconds
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</code></pre>
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<p><code>hiphop</code>,
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Intel Xeon E3-1220 v3:</p>
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<pre><code>cpucycles version 20230105
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cpucycles tracesetup 0 amd64-pmc precision 40 scaling 1.000000 only32 0
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cpucycles tracesetup 1 amd64-tsc precision 124 scaling 1.000000 only32 0
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cpucycles tracesetup 2 amd64-tscasm precision 124 scaling 1.000000 only32 0
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cpucycles tracesetup 3 default-perfevent precision 160 scaling 1.000000 only32 0
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cpucycles tracesetup 4 default-mach precision 0 scaling 0.000000 only32 0
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cpucycles tracesetup 5 default-monotonic precision 272 scaling 3.100000 only32 0
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cpucycles tracesetup 6 default-gettimeofday precision 3300 scaling 3100.000000 only32 0
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cpucycles tracesetup 7 default-zero precision 0 scaling 0.000000 only32 0
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cpucycles persecond 3100000000
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cpucycles implementation amd64-pmc
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cpucycles median 44 +38+23+23+23-4+0-4+0-4+0-4+0+10-4-2+1-4+1-4+1+17+1-4+1-4+1-4+0-4+0-4+0-4+0-4+0-4+0-4+0-4+0-4+0-4+0-4+0-4+0-4+0-4+0-4+0-4+0-4+0-4+0-4
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cpucycles observed persecond 2066500000...4235000000 with 8192 loops 3 microseconds
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cpucycles observed persecond 2760833333...4200250000 with 16384 loops 5 microseconds
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cpucycles observed persecond 2743416666...3313100000 with 32768 loops 11 microseconds
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cpucycles observed persecond 2986227272...3295000000 with 65536 loops 21 microseconds
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cpucycles observed persecond 3052069767...3206073171 with 131072 loops 42 microseconds
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cpucycles observed persecond 3050395348...3125523810 with 262144 loops 85 microseconds
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cpucycles observed persecond 3085123529...3123059524 with 524288 loops 169 microseconds
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cpucycles observed persecond 3084561764...3103434912 with 1048576 loops 339 microseconds
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</code></pre>
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<p><code>nucnuc</code>,
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Intel Pentium N3700:</p>
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<pre><code>cpucycles version 20230105
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cpucycles tracesetup 0 amd64-pmc precision 26 scaling 1.000000 only32 0
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cpucycles tracesetup 1 amd64-tsc precision 120 scaling 1.000000 only32 0
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cpucycles tracesetup 2 amd64-tscasm precision 120 scaling 1.000000 only32 0
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cpucycles tracesetup 3 default-perfevent precision 427 scaling 1.000000 only32 0
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cpucycles tracesetup 4 default-mach precision 0 scaling 0.000000 only32 0
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cpucycles tracesetup 5 default-monotonic precision 320 scaling 1.600000 only32 0
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cpucycles tracesetup 6 default-gettimeofday precision 1800 scaling 1600.000000 only32 0
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cpucycles tracesetup 7 default-zero precision 0 scaling 0.000000 only32 0
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cpucycles persecond 1600000000
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cpucycles implementation amd64-pmc
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cpucycles median 66 +12+12+14+14-1-1+0-1+0-1+0-1+0+1-1+0-1+0-1+0-2+0-1+0-1+0-1+0-2+0-1+0-1+0-1+0-2+0-1+0-1+1-1+0-2-1-1+0-1+0-1+0-2+0-1+2+0-1+0-1+0+0-1
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cpucycles observed persecond 1060500000...2325000000 with 2048 loops 3 microseconds
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cpucycles observed persecond 1387166666...2208250000 with 4096 loops 5 microseconds
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cpucycles observed persecond 1376083333...1705500000 with 8192 loops 11 microseconds
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cpucycles observed persecond 1495727272...1671800000 with 16384 loops 21 microseconds
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cpucycles observed persecond 1563428571...1655100000 with 32768 loops 41 microseconds
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cpucycles observed persecond 1580807228...1626234568 with 65536 loops 82 microseconds
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cpucycles observed persecond 1589539393...1612619632 with 131072 loops 164 microseconds
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cpucycles observed persecond 1598841463...1610230062 with 262144 loops 327 microseconds
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cpucycles observed persecond 1564336810...1569988042 with 524288 loops 670 microseconds
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cpucycles observed persecond 1599759725...1602608098 with 1048576 loops 1310 microseconds
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</code></pre>
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<p><code>saber214</code>,
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AMD FX-8350:</p>
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<pre><code>cpucycles version 20230105
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cpucycles tracesetup 0 amd64-pmc precision 0 scaling 0.000000 only32 0
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cpucycles tracesetup 1 amd64-tsc precision 167 scaling 1.000000 only32 0
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cpucycles tracesetup 2 amd64-tscasm precision 168 scaling 1.000000 only32 0
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cpucycles tracesetup 3 default-perfevent precision 0 scaling 0.000000 only32 0
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cpucycles tracesetup 4 default-mach precision 0 scaling 0.000000 only32 0
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cpucycles tracesetup 5 default-monotonic precision 376 scaling 4.013452 only32 0
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cpucycles tracesetup 6 default-gettimeofday precision 4213 scaling 4013.452000 only32 0
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cpucycles tracesetup 7 default-zero precision 0 scaling 0.000000 only32 0
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cpucycles persecond 4013452000
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cpucycles implementation amd64-tsc
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cpucycles median 77 +87-2+21+7+4+1+0+2-2-7-4+0+1+4-2+3+1-2-2+5-6+2+2+2+2+1-1-1+0-4+0-1-1-1-2+3-1-1+2-2+0+0+2+0+0+2-2-2+1-1-2+2-5+2+0+2+0+1+0+3-2-1-1
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cpucycles observed persecond 2767500000...5759000000 with 4096 loops 3 microseconds
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cpucycles observed persecond 3426000000...4893800000 with 8192 loops 6 microseconds
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cpucycles observed persecond 3724076923...4446363637 with 16384 loops 12 microseconds
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cpucycles observed persecond 3977833333...4363318182 with 32768 loops 23 microseconds
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cpucycles observed persecond 3984854166...4168739131 with 65536 loops 47 microseconds
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cpucycles observed persecond 3981709923...4048193799 with 131072 loops 130 microseconds
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cpucycles observed persecond 3982716417...4026914573 with 262144 loops 200 microseconds
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cpucycles observed persecond 4001637602...4025136987 with 524288 loops 366 microseconds
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cpucycles observed persecond 4007411111...4018600248 with 1048576 loops 809 microseconds
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</code></pre>
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<p><code>gcc14</code>,
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Intel Xeon E5-2620 v3,
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Debian testing (bookworm),
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Linux kernel 6.0.0-6-amd64:</p>
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<pre><code>cpucycles version 20230105
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cpucycles tracesetup 0 amd64-pmc precision 41 scaling 1.000000 only32 0
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cpucycles tracesetup 1 amd64-tsc precision 148 scaling 1.000000 only32 0
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cpucycles tracesetup 2 amd64-tscasm precision 148 scaling 1.000000 only32 0
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cpucycles tracesetup 3 default-perfevent precision 159 scaling 1.000000 only32 0
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cpucycles tracesetup 4 default-mach precision 0 scaling 0.000000 only32 0
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cpucycles tracesetup 5 default-monotonic precision 289 scaling 3.200000 only32 0
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cpucycles tracesetup 6 default-gettimeofday precision 3400 scaling 3200.000000 only32 0
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cpucycles tracesetup 7 default-zero precision 0 scaling 0.000000 only32 0
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cpucycles persecond 3200000000
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cpucycles implementation amd64-pmc
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cpucycles median 47 +47+28+0+2-5+0+2-5+16+2-5+0+2-5+0+1-4+0+1-4+0+1-4+0+1-4+0+1-4+0+1-4+0+1-4+0+1-4+0+1-4+0+1-4+0+1-4+0+1-4+0+1-4+0+1-4+0+1-4+0+1-4+0
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cpucycles observed persecond 1653800000...2819333334 with 8192 loops 4 microseconds
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cpucycles observed persecond 1832111111...2389285715 with 16384 loops 8 microseconds
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cpucycles observed persecond 1936058823...2207200000 with 32768 loops 16 microseconds
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cpucycles observed persecond 2052843750...2196200000 with 65536 loops 31 microseconds
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cpucycles observed persecond 2050750000...2120048388 with 131072 loops 63 microseconds
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cpucycles observed persecond 2081896825...2117048388 with 262144 loops 125 microseconds
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cpucycles observed persecond 2089478087...2107044177 with 524288 loops 250 microseconds
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cpucycles observed persecond 2093343313...2102124249 with 1048576 loops 500 microseconds
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</code></pre>
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<p><code>gcc23</code>,
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Cavium Octeon II V0.1,
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Debian 8.11,
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Linux kernel 4.1.4:</p>
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<pre><code>cpucycles version 20230105
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cpucycles tracesetup 0 mips64-cc precision 24 scaling 1.000000 only32 1
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cpucycles tracesetup 1 default-perfevent precision 0 scaling 0.000000 only32 0
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cpucycles tracesetup 2 default-mach precision 0 scaling 0.000000 only32 0
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cpucycles tracesetup 3 default-monotonic precision 46702 scaling 2.399988 only32 0
|
||
cpucycles tracesetup 4 default-gettimeofday precision 45799 scaling 2399.987654 only32 0
|
||
cpucycles tracesetup 5 default-zero precision 0 scaling 0.000000 only32 0
|
||
cpucycles persecond 2399987654
|
||
cpucycles implementation mips64-cc
|
||
cpucycles median 2177 +828+17+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0
|
||
cpucycles observed persecond 641900000...1845125000 with 1024 loops 9 microseconds
|
||
cpucycles observed persecond 745357142...1352083334 with 2048 loops 13 microseconds
|
||
cpucycles observed persecond 809826086...1162333334 with 4096 loops 22 microseconds
|
||
cpucycles observed persecond 897717948...1104405406 with 8192 loops 38 microseconds
|
||
cpucycles observed persecond 957467532...1059986667 with 16384 loops 76 microseconds
|
||
cpucycles observed persecond 973102189...1029777778 with 32768 loops 136 microseconds
|
||
cpucycles observed persecond 986518656...1015830828 with 65536 loops 267 microseconds
|
||
cpucycles observed persecond 993452830...1008166667 with 131072 loops 529 microseconds
|
||
cpucycles observed persecond 996036966...1003403609 with 262144 loops 1054 microseconds
|
||
cpucycles observed persecond 984706378...1001682630 with 524288 loops 2131 microseconds
|
||
cpucycles observed persecond 992585292...1001178580 with 1048576 loops 4296 microseconds
|
||
</code></pre>
|
||
<p><code>gcc45</code>,
|
||
AMD Athlon II X4 640,
|
||
Debian 8.11,
|
||
Linux kernel 3.16.0-11-686-pae:</p>
|
||
<pre><code>cpucycles version 20230105
|
||
cpucycles tracesetup 0 x86-tsc precision 199 scaling 1.000000 only32 0
|
||
cpucycles tracesetup 1 x86-tscasm precision 199 scaling 1.000000 only32 0
|
||
cpucycles tracesetup 2 default-perfevent precision 170 scaling 1.000000 only32 0
|
||
cpucycles tracesetup 3 default-mach precision 0 scaling 0.000000 only32 0
|
||
cpucycles tracesetup 4 default-monotonic precision 941 scaling 3.000000 only32 0
|
||
cpucycles tracesetup 5 default-gettimeofday precision 3200 scaling 3000.000000 only32 0
|
||
cpucycles tracesetup 6 default-zero precision 0 scaling 0.000000 only32 0
|
||
cpucycles persecond 3000000000
|
||
cpucycles implementation default-perfevent
|
||
cpucycles median 72 +12+0+0+0+0+0+0+0+5+0+0+0+0+0+0+0+2+0+0+0+0+0+0+0+1+0+0+0+0+0+0+0+2+0+0+0+0+0+0+0+1+0+0+0+0+0+0+0+2+0+0+0+0+0+0+0+1+0+0+0+0+0+0
|
||
cpucycles observed persecond 541500000...1812000000 with 1024 loops 3 microseconds
|
||
cpucycles observed persecond 712333333...1212250000 with 2048 loops 5 microseconds
|
||
cpucycles observed persecond 1193285714...1733600000 with 4096 loops 6 microseconds
|
||
cpucycles observed persecond 1689176470...1804562500 with 8192 loops 33 microseconds
|
||
cpucycles observed persecond 1713074626...1770600000 with 16384 loops 66 microseconds
|
||
cpucycles observed persecond 1765107692...1795140625 with 32768 loops 129 microseconds
|
||
cpucycles observed persecond 1785369649...1800603922 with 65536 loops 256 microseconds
|
||
cpucycles observed persecond 1781377862...1796288462 with 131072 loops 261 microseconds
|
||
cpucycles observed persecond 1772647398...1778247827 with 262144 loops 691 microseconds
|
||
cpucycles observed persecond 1789670493...1794149598 with 524288 loops 870 microseconds
|
||
cpucycles observed persecond 1860276211...1861561332 with 1048576 loops 3156 microseconds
|
||
</code></pre>
|
||
<p><code>gcc92</code>,
|
||
SiFive Freedom U740,
|
||
Ubuntu 22.04,
|
||
Linux kernel 5.15.0-1014-generic:</p>
|
||
<pre><code>cpucycles version 20230105
|
||
cpucycles tracesetup 0 riscv64-rdcycle precision 8 scaling 1.000000 only32 0
|
||
cpucycles tracesetup 1 default-perfevent precision 3024 scaling 1.000000 only32 0
|
||
cpucycles tracesetup 2 default-mach precision 0 scaling 0.000000 only32 0
|
||
cpucycles tracesetup 3 default-monotonic precision 2599 scaling 2.399988 only32 0
|
||
cpucycles tracesetup 4 default-gettimeofday precision 2599 scaling 2399.987654 only32 0
|
||
cpucycles tracesetup 5 default-zero precision 0 scaling 0.000000 only32 0
|
||
cpucycles persecond 2399987654
|
||
cpucycles implementation riscv64-rdcycle
|
||
cpucycles median 8 +33+27+1+1+1+1+0+0+0+22+0+0+0+0+0+0+0+628+0+0+0+7+0+0+0+145+0+0+0+0+0+0+0+22+0+0+0+0+0+0+0+158+0+0+0+0+0+0+0+22+0+0+0+0+0+0+0+22+0+0+0+0+0
|
||
cpucycles observed persecond 530250000...1978000000 with 1024 loops 3 microseconds
|
||
cpucycles observed persecond 831000000...1915666667 with 2048 loops 4 microseconds
|
||
cpucycles observed persecond 1055750000...1689500000 with 4096 loops 7 microseconds
|
||
cpucycles observed persecond 1045562500...1305428572 with 8192 loops 15 microseconds
|
||
cpucycles observed persecond 1102700000...1236357143 with 16384 loops 29 microseconds
|
||
cpucycles observed persecond 1176053571...1247444445 with 32768 loops 55 microseconds
|
||
cpucycles observed persecond 1173321428...1209127273 with 65536 loops 111 microseconds
|
||
cpucycles observed persecond 1187805429...1205210046 with 131072 loops 220 microseconds
|
||
cpucycles observed persecond 1192415909...1201157535 with 262144 loops 439 microseconds
|
||
cpucycles observed persecond 1194694760...1199247717 with 524288 loops 877 microseconds
|
||
cpucycles observed persecond 1194656004...1197023034 with 1048576 loops 1781 microseconds
|
||
</code></pre>
|
||
<p><code>gcc103</code>,
|
||
Apple M1 (Icestorm-M1 + Firestorm-M1),
|
||
Debian unstable (bookworm),
|
||
Linux kernel 6.0.0-rc5-asahi-00001-gc62bd3fe430f:</p>
|
||
<pre><code>cpucycles version 20230105
|
||
cpucycles tracesetup 0 arm64-pmc precision 0 scaling 0.000000 only32 0
|
||
cpucycles tracesetup 1 arm64-vct precision 186 scaling 86.000000 only32 0
|
||
cpucycles tracesetup 2 default-perfevent precision 0 scaling 0.000000 only32 0
|
||
cpucycles tracesetup 3 default-mach precision 0 scaling 0.000000 only32 0
|
||
cpucycles tracesetup 4 default-monotonic precision 285 scaling 2.064000 only32 0
|
||
cpucycles tracesetup 5 default-gettimeofday precision 2264 scaling 2064.000000 only32 0
|
||
cpucycles tracesetup 6 default-zero precision 0 scaling 0.000000 only32 0
|
||
cpucycles persecond 2064000000
|
||
cpucycles implementation arm64-vct
|
||
cpucycles median 0 +0+86+0+0+0+0+0+0+0+0+0+0+0+0+86+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+86+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+86+0+0+0+0+0+0+0+0
|
||
cpucycles observed persecond 1784500000...3655000000 with 8192 loops 3 microseconds
|
||
cpucycles observed persecond 1773750000...2393666667 with 16384 loops 7 microseconds
|
||
cpucycles observed persecond 1897733333...2222769231 with 32768 loops 14 microseconds
|
||
cpucycles observed persecond 1951310344...2114962963 with 65536 loops 28 microseconds
|
||
cpucycles observed persecond 2024071428...2107000000 with 131072 loops 55 microseconds
|
||
cpucycles observed persecond 2041531531...2082935780 with 262144 loops 110 microseconds
|
||
cpucycles observed persecond 2051158371...2071461188 with 524288 loops 220 microseconds
|
||
cpucycles observed persecond 2058539682...2068309795 with 1048576 loops 440 microseconds
|
||
</code></pre>
|
||
<p><code>gcc112</code> (<code>gcc2-power8</code>),
|
||
IBM POWER8E,
|
||
CentOS 7.9 AltArch,
|
||
Linux kernel 3.10.0-1127.13.1.el7.ppc64le:</p>
|
||
<pre><code>cpucycles version 20230105
|
||
cpucycles tracesetup 0 ppc64-mftb precision 251 scaling 7.207031 only32 0
|
||
cpucycles tracesetup 1 default-perfevent precision 295 scaling 1.000000 only32 0
|
||
cpucycles tracesetup 2 default-mach precision 0 scaling 0.000000 only32 0
|
||
cpucycles tracesetup 3 default-monotonic precision 536 scaling 3.690000 only32 0
|
||
cpucycles tracesetup 4 default-gettimeofday precision 3890 scaling 3690.000000 only32 0
|
||
cpucycles tracesetup 5 default-zero precision 0 scaling 0.000000 only32 0
|
||
cpucycles persecond 3690000000
|
||
cpucycles implementation ppc64-mftb
|
||
cpucycles median 195 +2969-8+14+0-8+7-8-7+7+6-7-1+0-1+0+7+7-15+7-1-7+6+0+0-8+0+6+0-8+7+0+7-8-8-7-1+7-8+7+0-8+0+14-8-7+6+0-8+7+7-15+0-1+0-1+14+0-15+14+0-1+7+0
|
||
cpucycles observed persecond 2603750000...5510000000 with 2048 loops 3 microseconds
|
||
cpucycles observed persecond 3430500000...6052250000 with 4096 loops 5 microseconds
|
||
cpucycles observed persecond 3411333333...4457500000 with 8192 loops 11 microseconds
|
||
cpucycles observed persecond 3548695652...4060333334 with 16384 loops 22 microseconds
|
||
cpucycles observed persecond 3624977777...3876534884 with 32768 loops 44 microseconds
|
||
cpucycles observed persecond 3621855555...3745363637 with 65536 loops 89 microseconds
|
||
cpucycles observed persecond 3660157303...3722227273 with 131072 loops 177 microseconds
|
||
cpucycles observed persecond 3680471751...3711622160 with 262144 loops 353 microseconds
|
||
cpucycles observed persecond 3685321074...3700886525 with 524288 loops 706 microseconds
|
||
cpucycles observed persecond 3687745930...3695537208 with 1048576 loops 1412 microseconds
|
||
</code></pre>
|
||
<p><code>gcc202</code>,
|
||
UltraSparc T5,
|
||
Debian unstable (bookworm),
|
||
Linux kernel 5.19.0-2-sparc64-smp:</p>
|
||
<pre><code>cpucycles version 20230105
|
||
cpucycles tracesetup 0 sparc64-rdtick precision 65 scaling 1.000000 only32 0
|
||
cpucycles tracesetup 1 default-perfevent precision 386 scaling 1.000000 only32 0
|
||
cpucycles tracesetup 2 default-mach precision 0 scaling 0.000000 only32 0
|
||
cpucycles tracesetup 3 default-monotonic precision 442 scaling 3.599910 only32 0
|
||
cpucycles tracesetup 4 default-gettimeofday precision 3799 scaling 3599.910000 only32 0
|
||
cpucycles tracesetup 5 default-zero precision 0 scaling 0.000000 only32 0
|
||
cpucycles persecond 3599910000
|
||
cpucycles implementation sparc64-rdtick
|
||
cpucycles median 73 +24+0+24+24+24+24+24+24+0+1+24+0+1+24+0+1+24+0+0+1+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+0+1+0+0+0+0+0+0+0+0+0+0+0+0+0
|
||
cpucycles observed persecond 2751500000...4258250000 with 4096 loops 5 microseconds
|
||
cpucycles observed persecond 3289200000...4206875000 with 8192 loops 9 microseconds
|
||
cpucycles observed persecond 3454789473...3900823530 with 16384 loops 18 microseconds
|
||
cpucycles observed persecond 3452026315...3659888889 with 32768 loops 37 microseconds
|
||
cpucycles observed persecond 3543770270...3650916667 with 65536 loops 73 microseconds
|
||
cpucycles observed persecond 3567299319...3620662069 with 131072 loops 146 microseconds
|
||
cpucycles observed persecond 3591373287...3618220690 with 262144 loops 291 microseconds
|
||
cpucycles observed persecond 3597353344...3610774527 with 524288 loops 582 microseconds
|
||
cpucycles observed persecond 3595899403...3603058071 with 1048576 loops 1172 microseconds
|
||
</code></pre>
|
||
<p>IBM z15:</p>
|
||
<pre><code>cpucycles version 20230106
|
||
cpucycles tracesetup 0 s390x-stckf precision 250 scaling 1.269531 only32 0
|
||
cpucycles tracesetup 1 default-perfevent precision 0 scaling 0.000000 only32 0
|
||
cpucycles tracesetup 2 default-mach precision 0 scaling 0.000000 only32 0
|
||
cpucycles tracesetup 3 default-monotonic precision 272 scaling 5.200000 only32 0
|
||
cpucycles tracesetup 4 default-gettimeofday precision 5400 scaling 5200.000000 only32 0
|
||
cpucycles tracesetup 5 default-zero precision 0 scaling 0.000000 only32 0
|
||
cpucycles persecond 5200000000
|
||
cpucycles implementation s390x-stckf
|
||
cpucycles median 48 +87+8+0-2+0+0+38-2+0+1-3+1+28+0+3-3+1+0+28+0-2+3+0-2+36+0+0+0+1+0+28+0-2+0+3-2+35+1+0-2+0+3+28+0-2+0+0-2+3+25+3+0-2+0+1+35+1+0+0-2+0+28+0
|
||
cpucycles observed persecond 4948941176...5627733334 with 8192 loops 16 microseconds
|
||
cpucycles observed persecond 4104125000...5515666667 with 16384 loops 7 microseconds
|
||
cpucycles observed persecond 5047076923...5987818182 with 32768 loops 12 microseconds
|
||
cpucycles observed persecond 5044846153...5475708334 with 65536 loops 25 microseconds
|
||
cpucycles observed persecond 5141313725...5357428572 with 131072 loops 50 microseconds
|
||
cpucycles observed persecond 5150892156...5257250000 with 262144 loops 101 microseconds
|
||
cpucycles observed persecond 5183421568...5236549505 with 524288 loops 203 microseconds
|
||
cpucycles observed persecond 5190282555...5216582717 with 1048576 loops 406 microseconds
|
||
</code></pre><hr><font size=1><b>Version:</b>
|
||
This is version 2023.01.06 of the "Counters" web page.
|
||
</font>
|
||
</div>
|
||
</body>
|
||
</html>
|