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diff --git a/indra/llcommon/llsys.h b/indra/llcommon/llsys.h
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+++ b/indra/llcommon/llsys.h
@@ -0,0 +1,91 @@
+/** 
+ * @file llsys.h
+ * @brief System information debugging classes.
+ *
+ * Copyright (c) 2001-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+#ifndef LL_SYS_H
+#define LL_SYS_H
+
+//
+// The LLOSInfo, LLCPUInfo, and LLMemoryInfo classes are essentially
+// the same, but query different machine subsystems. Here's how you
+// use an LLCPUInfo object:
+//
+//  LLCPUInfo info;
+//  llinfos << info << llendl;
+//
+
+#include <iosfwd>
+#include <string>
+
+class LLOSInfo
+{
+public:
+	LLOSInfo();
+	void stream(std::ostream& s) const;
+
+	const std::string& getOSString() const;
+
+	S32 mMajorVer;
+	S32 mMinorVer;
+	S32 mBuild;
+
+#ifndef LL_WINDOWS
+	static S32 getMaxOpenFiles();
+#endif
+
+	static U32 getProcessVirtualSizeKB();
+	static U32 getProcessResidentSizeKB();
+private:
+	std::string mOSString;
+};
+
+
+class LLCPUInfo
+{
+public:
+	LLCPUInfo();	
+	void stream(std::ostream& s) const;
+
+	std::string getCPUString() const;
+	std::string getCPUStringTerse() const;
+
+	BOOL  hasSSE() const	{ return mHasSSE; }
+	BOOL  hasSSE2()	const	{ return mHasSSE2; }
+	S32	  getMhz() const	{ return mCPUMhz; }
+
+	// Family is "AMD Duron" or "Intel Pentium Pro"
+	const std::string& getFamily() const { return mFamily; }
+
+private:
+	BOOL mHasSSE;
+	BOOL mHasSSE2;
+	S32 mCPUMhz;
+	std::string mFamily;
+};
+
+class LLMemoryInfo
+{
+public:
+	LLMemoryInfo();
+	void stream(std::ostream& s) const;
+
+	U32 getPhysicalMemory() const;
+};
+
+
+std::ostream& operator<<(std::ostream& s, const LLOSInfo& info);
+std::ostream& operator<<(std::ostream& s, const LLCPUInfo& info);
+std::ostream& operator<<(std::ostream& s, const LLMemoryInfo& info);
+
+// gunzip srcfile into dstfile.  Returns FALSE on error.
+BOOL gunzip_file(const char *srcfile, const char *dstfile);
+// gzip srcfile into dstfile.  Returns FALSE on error.
+BOOL gzip_file(const char *srcfile, const char *dstfile);
+
+extern LLCPUInfo gSysCPU;
+
+#endif // LL_LLSYS_H