Date: Tue, 7 Feb 2006 21:22:02 +0000 (UTC) From: Poul-Henning Kamp <phk@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/alpha/alpha mp_machdep.c src/sys/amd64/amd64 mp_machdep.c src/sys/i386/i386 mp_machdep.c src/sys/ia64/ia64 mp_machdep.c src/sys/kern init_main.c kern_exit.c kern_proc.c kern_resource.c kern_synch.c kern_tc.c subr_trap.c ... Message-ID: <200602072122.k17LM2F1014272@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
phk 2006-02-07 21:22:02 UTC FreeBSD src repository Modified files: sys/alpha/alpha mp_machdep.c sys/amd64/amd64 mp_machdep.c sys/i386/i386 mp_machdep.c sys/ia64/ia64 mp_machdep.c sys/kern init_main.c kern_exit.c kern_proc.c kern_resource.c kern_synch.c kern_tc.c subr_trap.c sys/sparc64/sparc64 mp_machdep.c tick.c sys/sys pcpu.h proc.h systm.h Log: Modify the way we account for CPU time spent (step 1) Keep track of time spent by the cpu in various contexts in units of "cputicks" and scale to real-world microsec^H^H^H^H^H^H^H^Hclock_t only when somebody wants to inspect the numbers. For now "cputicks" are still derived from the current timecounter and therefore things should by definition remain sensible also on SMP machines. (The main reason for this first milestone commit is to verify that hypothesis.) On slower machines, the avoided multiplications to normalize timestams at every context switch, comes out as a 5-7% better score on the unixbench/context1 microbenchmark. On more modern hardware no change in performance is seen. Revision Changes Path 1.58 +1 -1 src/sys/alpha/alpha/mp_machdep.c 1.268 +1 -1 src/sys/amd64/amd64/mp_machdep.c 1.262 +1 -1 src/sys/i386/i386/mp_machdep.c 1.59 +1 -1 src/sys/ia64/ia64/mp_machdep.c 1.262 +2 -3 src/sys/kern/init_main.c 1.282 +3 -4 src/sys/kern/kern_exit.c 1.239 +1 -3 src/sys/kern/kern_proc.c 1.153 +12 -9 src/sys/kern/kern_resource.c 1.274 +4 -5 src/sys/kern/kern_synch.c 1.167 +21 -0 src/sys/kern/kern_tc.c 1.284 +1 -1 src/sys/kern/subr_trap.c 1.31 +1 -1 src/sys/sparc64/sparc64/mp_machdep.c 1.19 +17 -0 src/sys/sparc64/sparc64/tick.c 1.17 +1 -1 src/sys/sys/pcpu.h 1.450 +1 -1 src/sys/sys/proc.h 1.239 +3 -0 src/sys/sys/systm.h
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200602072122.k17LM2F1014272>