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PMC.TSC(3) BSD Library Functions Manual PMC.TSC(3) NAME pmc.tsc -- measurements using the i386 timestamp counter LIBRARY Performance Counters Library (libpmc, -lpmc) SYNOPSIS #include <pmc.h> DESCRIPTION In the i386 architecture, the timestamp counter is a monotonically non- decreasing counter that counts processor cycles. This counter may be selected specifying an event specifier "tsc" to pmc_allocate(3). The TSC is a read-only counter that may only be allo- cated in system-wide counting mode. The "tsc" event does not support further event qualifiers. Multiple processes are allowed to allocate the TSC. Once allocated, the TSC may be read using the pmc_read() function, or by using the RDTSC in- struction. Event Name Aliases The alias "cycles" maps to the TSC. SEE ALSO pmc(3), pmc.atom(3), pmc.core(3), pmc.core2(3), pmc.iaf(3), pmc.k7(3), pmc.k8(3), pmc.p4(3), pmc.p5(3), pmc.p6(3), pmc.soft(3), pmclog(3), hwpmc(4) HISTORY The pmc library first appeared in FreeBSD 6.0. AUTHORS The Performance Counters Library (libpmc, -lpmc) library was written by Joseph Koshy <jkoshy@FreeBSD.org>. BSD October 4, 2008 BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY | AUTHORS
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