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>From 35ed380ad8e4ddd901bb75eb25e2c51f12eedeaf Mon Sep 17 00:00:00 2001</div>
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From: Shashank Pathipati <shashank.pathipati@multicorewareinc.com></div>
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Date: Fri, 10 Apr 2026 14:33:41 +0530</div>
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Subject: [PATCH 4/6] feat(tme): add CPU frequency adaptive threadpool split</div>
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---</div>
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source/common/threadpool.cpp | 85 ++++++++++++++++++++++++++++++++++--</div>
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source/common/threadpool.h | 14 ++++++</div>
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2 files changed, 96 insertions(+), 3 deletions(-)</div>
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diff --git a/source/common/threadpool.cpp b/source/common/threadpool.cpp</div>
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index 79075425a..b3e29bea4 100644</div>
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--- a/source/common/threadpool.cpp</div>
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+++ b/source/common/threadpool.cpp</div>
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@@ -33,6 +33,15 @@</div>
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#include <winnt.h></div>
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#endif</div>
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</div>
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+#if defined(__APPLE__)</div>
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+#include <sys/sysctl.h></div>
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+#elif !defined(_WIN32)</div>
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+#include <fstream></div>
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+#include <string></div>
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+#include <cstdio></div>
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+#include <cstdlib></div>
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+#endif</div>
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+</div>
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#if X86_64</div>
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</div>
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#ifdef __GNUC__</div>
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@@ -351,7 +360,6 @@ static void distributeThreadsForTme(</div>
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}</div>
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</div>
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// Apply calculated threadpool assignment</div>
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- // TODO: Make sure this doesn't cause a problem later on</div>
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memset(threadsPerPool, 0, sizeof(int) * (numNumaNodes + 2));</div>
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memset(nodeMaskPerPool, 0, sizeof(uint64_t) * (numNumaNodes + 2));</div>
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</div>
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@@ -905,16 +913,87 @@ int ThreadPool::configureTmeThreadCount(x265_param* param, int cpuCount)</div>
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}</div>
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}</div>
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</div>
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+ bool isHighFreq = (getCPUFrequencyMHz() > 1500.0);</div>
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+</div>
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if (selectedRule >= 0)</div>
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{</div>
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const TmeRuleConfig& cfg = s_tmeRuleConfig[selectedRule];</div>
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param->tmeTaskBlockSize = cfg.widthBasedTaskBlockSize ? ((param->sourceWidth + 480 - 1) / 480) : cfg.taskBlockSize[resClass];</div>
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param->tmeNumBufferRows = cfg.numBufferRows[resClass];</div>
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- return (cpuCount * cfg.threadPercent[resClass]) / 100;</div>
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+ return (!isHighFreq) ? (cpuCount * cfg.threadPercent[resClass]) / 100 : cpuCount / 2;</div>
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}</div>
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</div>
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static const int s_defaultThreadPercent[TME_RES_COUNT] = { 80, 80, 70 };</div>
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- return (cpuCount * s_defaultThreadPercent[resClass]) / 100;</div>
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+ return (!isHighFreq) ? (cpuCount * s_defaultThreadPercent[resClass]) / 100 : cpuCount / 2;</div>
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+}</div>
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+</div>
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+double getCPUFrequencyMHz()</div>
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+{</div>
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+#if defined(_WIN32)</div>
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+ HKEY hKey;</div>
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+ DWORD mhz = 0;</div>
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+ DWORD size = sizeof(mhz);</div>
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+ if (RegOpenKeyExA(HKEY_LOCAL_MACHINE,</div>
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+ "HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0",</div>
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+ 0, KEY_READ, &hKey) == ERROR_SUCCESS)</div>
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+ {</div>
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+ RegQueryValueExA(hKey, "~MHz", NULL, NULL, (LPBYTE)&mhz, &size);</div>
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+ RegCloseKey(hKey);</div>
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+ }</div>
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+ return (double)mhz;</div>
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+</div>
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+#elif defined(__APPLE__)</div>
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+ uint64_t freq = 0;</div>
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+ size_t size = sizeof(freq);</div>
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+ if (sysctlbyname("hw.cpufrequency", &freq, &size, NULL, 0) == 0)</div>
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+ return (double)freq / 1.0e6;</div>
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+ return 0.0;</div>
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+</div>
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+#else /* Linux */</div>
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+ /* scaling_cur_freq reflects the live frequency chosen by the governor</div>
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+ * and EPP hint. Iterate over all cpuN entries and return the highest observed value.</div>
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+ */</div>
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+ {</div>
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+ uint64_t maxKhz = 0;</div>
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+ char path[64];</div>
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+ for (int cpu = 0; ; ++cpu)</div>
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+ {</div>
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+ snprintf(path, sizeof(path),</div>
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+ "/sys/devices/system/cpu/cpu%d/cpufreq/scaling_cur_freq", cpu);</div>
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+ std::ifstream f(path);</div>
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+ if (!f.is_open())</div>
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+ break;</div>
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+ uint64_t khz = 0;</div>
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+ f >> khz;</div>
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+ if (khz > maxKhz)</div>
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+ maxKhz = khz;</div>
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+ }</div>
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+ if (maxKhz > 0)</div>
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+ return (double)maxKhz / 1000.0;</div>
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+ }</div>
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+ /* Fall back to /proc/cpuinfo — collect the max "cpu MHz" across all entries. */</div>
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+ {</div>
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+ std::ifstream f("/proc/cpuinfo");</div>
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+ std::string line;</div>
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+ double maxMhz = 0.0;</div>
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+ while (std::getline(f, line))</div>
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+ {</div>
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+ if (line.find("cpu MHz") != std::string::npos)</div>
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+ {</div>
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+ size_t colon = line.find(':');</div>
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+ if (colon != std::string::npos)</div>
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+ {</div>
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+ double mhz = strtod(line.c_str() + colon + 1, NULL);</div>
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+ if (mhz > maxMhz)</div>
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+ maxMhz = mhz;</div>
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+ }</div>
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+ }</div>
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+ }</div>
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+ if (maxMhz > 0.0)</div>
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+ return maxMhz;</div>
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+ }</div>
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+ return 0.0;</div>
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+#endif</div>
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}</div>
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</div>
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} // end namespace X265_NS</div>
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diff --git a/source/common/threadpool.h b/source/common/threadpool.h</div>
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index f223fd010..04e35528e 100644</div>
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--- a/source/common/threadpool.h</div>
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+++ b/source/common/threadpool.h</div>
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@@ -171,6 +171,20 @@ public:</div>
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virtual void processTasks(int workerThreadId) = 0;</div>
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};</div>
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</div>
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+/**</div>
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+ * @brief Return the highest current CPU frequency in MHz across all cores, or 0.0 if unavailable.</div>
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+ *</div>
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+ * The value reflects the live frequency as reported by the cpufreq subsystem,</div>
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+ * which accounts for the active scaling governor and EPP hint.</div>
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+ *</div>
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+ * Platform support:</div>
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+ * Linux – iterates /sys/devices/system/cpu/cpuN/cpufreq/scaling_cur_freq (kHz)</div>
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+ * for all cores and returns the maximum; falls back to /proc/cpuinfo</div>
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+ * macOS – sysctl hw.cpufrequency (Hz)</div>
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+ * Windows – registry ~MHz under CentralProcessor\0</div>
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+ */</div>
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+double getCPUFrequencyMHz();</div>
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+</div>
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} // end namespace X265_NS</div>
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</div>
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#endif // ifndef X265_THREADPOOL_H</div>
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--</div>
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2.52.0.windows.1</div>
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<br>
<br>
</div>
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</div>
</body>
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