Date: Sat, 24 Apr 2004 09:25:00 -0700 (PDT) From: Nate Lawson <njl@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/dev/acpica acpi_timer.c Message-ID: <200404241625.i3OGP0u6046457@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
njl 2004/04/24 09:25:00 PDT FreeBSD src repository Modified files: sys/dev/acpica acpi_timer.c Log: Disable interrupts while testing the timer. Not doing this unnecessarily added an arbitrary delay to our readings, causing us to use the ACPI-safe read method when not necessary. Submitted by: bde Old: ACPI timer looks GOOD min = 3, max = 5, width = 2 ACPI timer looks BAD min = 3, max = 19, width = 16 ACPI timer looks GOOD min = 3, max = 5, width = 2 ACPI timer looks GOOD min = 3, max = 5, width = 2 ACPI timer looks GOOD min = 3, max = 5, width = 2 ACPI timer looks GOOD min = 3, max = 4, width = 1 ACPI timer looks GOOD min = 3, max = 5, width = 2 ACPI timer looks BAD min = 3, max = 19, width = 16 ACPI timer looks GOOD min = 3, max = 5, width = 2 ACPI timer looks GOOD min = 3, max = 4, width = 1 Timecounter "ACPI-safe" frequency 3579545 Hz quality 1000 New: ACPI timer looks GOOD min = 3, max = 4, width = 1 ACPI timer looks GOOD min = 3, max = 4, width = 1 ACPI timer looks GOOD min = 3, max = 4, width = 1 ACPI timer looks GOOD min = 3, max = 4, width = 1 ACPI timer looks GOOD min = 3, max = 4, width = 1 ACPI timer looks GOOD min = 3, max = 4, width = 1 ACPI timer looks GOOD min = 3, max = 4, width = 1 ACPI timer looks GOOD min = 3, max = 4, width = 1 ACPI timer looks GOOD min = 3, max = 4, width = 1 ACPI timer looks GOOD min = 3, max = 4, width = 1 Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000 Also, reduce unnecesary overhead in ACPI-fast by remove the barrier for reads. The timer in the ACPI-fast case is known to increase monotonically so there is no need to serialize access to it. Revision Changes Path 1.32 +7 -6 src/sys/dev/acpica/acpi_timer.c
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200404241625.i3OGP0u6046457>