fhandler_proc/cpuinfo: support fast short REP MOVSB
Added in Linux 5.6: Check FSRM and use REP MOVSB for short copies on systems that have it. >From the Intel Optimization Reference Manual: 3.7.6.1 Fast Short REP MOVSB Beginning with processors based on Ice Lake Client microarchitecture, REP MOVSB performance is enhanced with string lengths up to 128 bytes. Support for fast-short REP MOVSB is indicated by the CPUID feature flag: CPUID [EAX=7H, ECX=0H).EDX.FAST_SHORT_REP_MOVSB[bit 4] = 1. There is no change in the REP STOS performance.
This commit is contained in:
parent
bf33f72d43
commit
86f9ce97bc
@ -1346,6 +1346,7 @@ format_proc_cpuinfo (void *, char *&destbuf)
|
|||||||
|
|
||||||
ftcprint (features1, 2, "avx512_4vnniw"); /* vec dot prod dw */
|
ftcprint (features1, 2, "avx512_4vnniw"); /* vec dot prod dw */
|
||||||
ftcprint (features1, 3, "avx512_4fmaps"); /* vec 4 FMA single */
|
ftcprint (features1, 3, "avx512_4fmaps"); /* vec 4 FMA single */
|
||||||
|
ftcprint (features1, 4, "fsrm"); /* fast short REP MOVSB */
|
||||||
ftcprint (features1, 8, "avx512_vp2intersect"); /* vec intcpt d/q */
|
ftcprint (features1, 8, "avx512_vp2intersect"); /* vec intcpt d/q */
|
||||||
ftcprint (features1, 10, "md_clear"); /* verw clear buf */
|
ftcprint (features1, 10, "md_clear"); /* verw clear buf */
|
||||||
ftcprint (features1, 18, "pconfig"); /* platform config */
|
ftcprint (features1, 18, "pconfig"); /* platform config */
|
||||||
|
Loading…
Reference in New Issue
Block a user