FreeBSD source tree https://cgit-dev.freebsd.org/src-test2/atom?h=release%2F2.2.2_cvs 1997-05-19T10:35:55Z 1997-05-19T10:35:55Z cvs2svn cvs2svn@FreeBSD.org 1997-05-19T10:35:55Z urn:sha1:a0d351b26be784ec2f31673b9c873781f01bad63 'RELENG_2_2_2_RELEASE'. This commit was manufactured to restore the state of the 2.2.2-RELEASE image. Releases prior to 5.3-RELEASE are omitting the secure/ and crypto/ subdirs. 1996-10-25T06:58:53Z Bruce Evans bde@FreeBSD.org 1996-10-25T06:58:53Z urn:sha1:1471a7951441deee29fb5f745ed67ee5209eb1f2 1996-10-17T19:32:31Z Bruce Evans bde@FreeBSD.org 1996-10-17T19:32:31Z urn:sha1:d6b9e17eb5a1ed2922bd5264a1afd046c0038d6b - use a more accurate and more efficient method of compensating for overheads. The old method counted too much time against leaf functions. - normally use the Pentium timestamp counter if available. On Pentiums, the times are now accurate to within a couple of cpu clock cycles per function call in the (unlikely) event that there are no cache misses in or caused by the profiling code. - optionally use an arbitrary Pentium event counter if available. - optionally regress to using the i8254 counter. - scaled the i8254 counter by a factor of 128. Now the i8254 counters overflow slightly faster than the TSC counters for a 150MHz Pentium :-) (after about 16 seconds). This is to avoid fractional overheads. files.i386: permon.c temporarily has to be classified as a profiling-routine because a couple of functions in it may be called from profiling code. options.i386: - I586_CTR_GUPROF is currently unused (oops). - I586_PMC_GUPROF should be something like 0x70000 to enable (but not use unless prof_machdep.c is changed) support for Pentium event counters. 7 is a control mode and the counter number 0 is somewhere in the 0000 bits (see perfmon.h for the encoding). profile.h: - added declarations. - cleaned up separation of user mode declarations. prof_machdep.c: Mostly clock-select changes. The default clock can be changed by editing kmem. There should be a sysctl for this. subr_prof.c: - added copyright. - calibrate overheads for the new method. - documented new method. - fixed races and and machine dependencies in start/stop code. mcount.c: Use the new overhead compensation method. gmon.h: - changed GPROF4 counter type from unsigned to int. Oops, this should be machine-dependent and/or int32_t. - reorganized overhead counters. Submitted by: Pentium event counter changes mostly by wollman 1996-08-28T20:15:32Z Bruce Evans bde@FreeBSD.org 1996-08-28T20:15:32Z urn:sha1:1f403fcfbfe1ea07bd14df956a65ed14811539d7 machine-dependent macro and passing it to all machine-dependent macros. Eliminated the state variable for the GUPROF case. 1996-05-02T14:21:14Z Poul-Henning Kamp phk@FreeBSD.org 1996-05-02T14:21:14Z urn:sha1:e911eafcbae5366e66f9560ca18bf60c5f8157a4 CLBYTES PD_SHIFT PGSHIFT NBPG PGOFSET CLSIZELOG2 CLSIZE pdei() ptei() kvtopte() ptetov() ispt() ptetoav() &c &c new: NPDEPG Major macro cleanup. 1995-12-30T07:24:13Z Bruce Evans bde@FreeBSD.org 1995-12-30T07:24:13Z urn:sha1:1ae38af2be512b4afb7cc39b8abda12495e51d47 path to a possibly-nonexistent place didn't work well enough. Sigh. 1995-12-29T15:30:05Z Bruce Evans bde@FreeBSD.org 1995-12-29T15:30:05Z urn:sha1:912e60377833803e8c89e2cbfd4c8eb8a6d90280 looking at a high resolution clock for each of the following events: function call, function return, interrupt entry, interrupt exit, and interesting branches. The differences between the times of these events are added at appropriate places in a ordinary histogram (as if very fast statistical profiling sampled the pc at those places) so that ordinary gprof can be used to analyze the times. gmon.h: Histogram counters need to be 4 bytes for microsecond resolutions. They will need to be larger for the 586 clock. The comments were vax-centric and wrong even on vaxes. Does anyone disagree? gprof4.c: The standard gprof should support counters of all integral sizes and the size of the counter should be in the gmon header. This hack will do until then. (Use gprof4 -u to examine the results of non-statistical profiling.) config/*: Non-statistical profiling is configured with `config -pp'. `config -p' still gives ordinary profiling. kgmon/*: Non-statistical profiling is enabled with `kgmon -B'. `kgmon -b' still enables ordinary profiling (and distables non-statistical profiling) if non-statistical profiling is configured. 1995-05-30T08:16:23Z Rodney W. Grimes rgrimes@FreeBSD.org 1995-05-30T08:16:23Z urn:sha1:9b2e535452929d6f2f798a2c01b23b1f547a0b0f 1994-09-15T15:41:48Z Paul Richards paul@FreeBSD.org 1994-09-15T15:41:48Z urn:sha1:03b6d659e548ca001229bdbaedcc51f90d292d22 Reviewed by: Bruce 1994-08-02T07:55:43Z David Greenman dg@FreeBSD.org 1994-08-02T07:55:43Z urn:sha1:3c4dd3568f411b4f00f795929afb77ca972c2325