fpuinfo Provider

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`fpuinfo` Provider

The fpuinfo provider includes probes that correspond to the simulation of floating-point instructions on SPARC microprocessors. While most floating-point instructions are executed in hardware, some floating-point operations trap into the operating system for simulation. The conditions under which floating-point operations require operating system simulation are specific to a microprocessor implementation. The operations that require simulation are rare. However, if an application uses one of these operations frequently, the effect on performance could be severe. The fpuinfo provider enables rapid investigation of floating-point simulation seen by using the kstat and the fpu_info kernel statistic or trapstat and the fp-xcp-other trap. For more information, see trapstat(1M).

`fpuinfo` Probes

The fpuinfo provider makes available a probe for each type of floating-point instruction that can be simulated. The fpuinfo provider has a Name Stability of CPU; the names of the probes are specific to a microprocessor implementation, and might not be available on different microprocessors within the same family. For example, some of the probes listed might only be available on UltraSPARC-III and not UltraSPARC-III+ or vice versa.

The fpuinfo probes are described in Figure 25, Table 25, List of fpuinfo Probes.

Table 25 List of fpuinfo Probes

Name of Probe	Description
fpu_sim_fitoq	Fires whenever an `fitoq` instruction is simulated by the kernel.
fpu_sim_fitod	Fires whenever an `fitod` instruction is simulated by the kernel.
fpu_sim_fitos	Fires whenever an `fitos` instruction is simulated by the kernel.
fpu_sim_fxtoq	Fires whenever an `fxtoq` instruction is simulated by the kernel.
fpu_sim_fxtod	Fires whenever an `fxtod` instruction is simulated by the kernel.
fpu_sim_fxtos	Fires whenever an `fxtos` instruction is simulated by the kernel.
fpu_sim_fqtox	Fires whenever an `fqtox` instruction is simulated by the kernel.
fpu_sim_fdtox	Fires whenever an `fdtox` instruction is simulated by the kernel.
fpu_sim_fstox	Fires whenever an `fstox` instruction is simulated by the kernel.
fpu_sim_fqtoi	Fires whenever an `fqtoi` instruction is simulated by the kernel.
fpu_sim_fdtoi	Fires whenever an `fdtoi` instruction is simulated by the kernel.
fpu_sim_fstoi	Fires whenever an `fstoi` instruction is simulated by the kernel.
fpu_sim_fsqrtq	Fires whenever an `fsqrtq` instruction is simulated by the kernel.
fpu_sim_fsqrtd	Fires whenever an `fsqrtd` instruction is simulated by the kernel.
fpu_sim_fsqrts	Fires whenever an `fsqrts` instruction is simulated by the kernel.
fpu_sim_fcmpeq	Fires whenever an `fcmpeq` instruction is simulated by the kernel.
fpu_sim_fcmped	Fires whenever an `fcmped` instruction is simulated by the kernel.
fpu_sim_fcmpes	Fires whenever an `fcmpes` instruction is simulated by the kernel.
fpu_sim_fcmpq	Fires whenever an `fcmpq` instruction is simulated by the kernel.
fpu_sim_fcmpd	Fires whenever an `fcmpd` instruction is simulated by the kernel.
fpu_sim_fcmps	Fires whenever an `fcmps` instruction is simulated by the kernel.
fpu_sim_fdivq	Fires whenever an `fdivq` instruction is simulated by the kernel.
fpu_sim_fdivd	Fires whenever an `fdivd` instruction is simulated by the kernel.
fpu_sim_fdivs	Fires whenever an `fdivs` instruction is simulated by the kernel.
fpu_sim_fdmulx	Fires whenever an `fdmulx` instruction is simulated by the kernel.
fpu_sim_fsmuld	Fires whenever an `fsmuld` instruction is simulated by the kernel.
fpu_sim_fmulq	Fires whenever an `fmulq` instruction is simulated by the kernel.
fpu_sim_fmuld	Fires whenever an `fmuld` instruction is simulated by the kernel.
fpu_sim_fmuls	Fires whenever an `fmuls` instruction is simulated by the kernel.
fpu_sim_fsubq	Fires whenever an `fsubq` instruction is simulated by the kernel.
fpu_sim_fsubd	Fires whenever an `fsubd` instruction is simulated by the kernel.
fpu_sim_fsubs	Fires whenever an `fsubs` instruction is simulated by the kernel.
fpu_sim_faddq	Fires whenever an `faddq` instruction is simulated by the kernel.
fpu_sim_faddd	Fires whenever an `faddd` instruction is simulated by the kernel.
fpu_sim_fadds	Fires whenever an `fadds` instruction is simulated by the kernel.
fpu_sim_fnegd	Fires whenever an `fnegd` instruction is simulated by the kernel.
fpu_sim_fnegq	Fires whenever an `fneqq` instruction is simulated by the kernel.
fpu_sim_fnegs	Fires whenever an `fnegs` instruction is simulated by the kernel.
fpu_sim_fabsd	Fires whenever an `fabsd` instruction is simulated by the kernel.
fpu_sim_fabsq	Fires whenever an `fabsq` instruction is simulated by the kernel.
fpu_sim_fabss	Fires whenever an `fabss` instruction is simulated by the kernel.
fpu_sim_fmovd	Fires whenever an `fmovd` instruction is simulated by the kernel.
fpu_sim_fmovq	Fires whenever an `fmovq` instruction is simulated by the kernel.
fpu_sim_fmovs	Fires whenever an `fmovs` instruction is simulated by the kernel.
fpu_sim_fmovr	Fires whenever an `fmovr` instruction is simulated by the kernel.
fpu_sim_fmovcc	Fires whenever an `fmovcc` instruction is simulated by the kernel.

`fpuinfo` Arguments

There are no arguments to fpuinfo probes.

`fpuinfo` Stability

The fpuinfo provider uses DTrace's stability mechanism to describe its stabilities, as shown in the following table. For more information about the stability mechanism, see DTrace Stability Mechanisms.

Table 26 Stability Mechanism for the fpuinfo Provider

Element	Name stability	Data stability	Dependency class
Provider	Evolving	Evolving	CPU
Module	Private	Private	Unknown
Function	Private	Private	Unknown
Name	Evolving	Evolving	CPU
Arguments	Evolving	Evolving	CPU

Oracle® Solaris 11.3 DTrace (Dynamic Tracing) Guide

fpuinfo Probes

fpuinfo Arguments

fpuinfo Stability

Oracle^® Solaris 11.3 DTrace (Dynamic Tracing) Guide