发明授权
US07647521B2 Using highly skewed clocks for application based tracing and application based normalization of processor clocks in an SMP environment
失效
使用高度扭曲的时钟，用于基于应用程序的跟踪和基于应用程序的SMP环境中处理器时钟的归一化
- 专利标题： Using highly skewed clocks for application based tracing and application based normalization of processor clocks in an SMP environment
- 专利标题（中）： 使用高度扭曲的时钟，用于基于应用程序的跟踪和基于应用程序的SMP环境中处理器时钟的归一化
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申请号： US11608908申请日： 2006-12-11
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公开(公告)号： US07647521B2公开(公告)日： 2010-01-12
- 发明人: Frank Eliot Levine , David Kevin Siegwart
- 申请人： Frank Eliot Levine , David Kevin Siegwart
- 申请人地址： US NY Armonk
- 专利权人： International Business Machines Corporation
- 当前专利权人： International Business Machines Corporation
- 当前专利权人地址： US NY Armonk
- 代理机构： Yee & Associates, P.C.
- 代理商 David A. Mims, Jr.
- 主分类号： G06F1/04
- IPC分类号： G06F1/04 ; G06F1/14 ; G06F11/00
摘要：
A method, apparatus and computer instructions for application based tracing and for normalization of processor clocks in a symmetric multiprocessor environment. By deliberately establishing a large skew among processor clocks, it is possible to perform application based tracing by directly using the processors. In addition, the identity, time stamp, and drift information of each processor may be used to create a time library. The time library is used to adjust a measured time to execute a program or software routine. The adjusted time is a normalized time that is statistically more accurate than the measured time alone. The adjusted time is then reported as the time to execute the program or software routine.
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