src-test2/sys/tools, branch release/9.2.0

MFC 246417,247116,248584:

2013-05-30T19:14:34Z

Rework the handling of stop signals in the NFS client. The changes in 195702, 195703, and 195821 prevented a thread from suspending while holding locks inside of NFS by forcing the thread to fail sleeps with EINTR or ERESTART but defer the thread suspension to the user boundary. However, this had the effect that stopping a process during an NFS request could abort the request and trigger EINTR errors that were visible to userland processes (previously the thread would have suspended and completed the request once it was resumed). This change instead effectively masks stop signals while in the NFS client. It uses the existing TDF_SBDRY flag to effect this since SIGSTOP cannot be masked directly. Instead of setting PBDRY on individual sleeps, change the VFS_*() and VOP_*() methods to defer stop signals for filesystems which request this behavior via a new VFCF_SBDRY flag. Note that this has to be a VFC flag rather than a MNTK flag so that it works properly with VFS_MOUNT() when the mount is not yet fully constructed. For now, only the NFS clients set this new flag in VFS_SET(). A few other related changes: - Add an assertion to ensure that TDF_SBDRY doesn't leak to userland. - When a lookup request uses VOP_READLINK() to follow a symlink, mark the request as being on behalf of the thread performing the lookup (cnp_thread) rather than using a NULL thread pointer. This causes NFS to properly handle signals during this VOP on an interruptible mount. - Ignore thread suspend requests due to SIGSTOP if stop signals are currently deferred. This can occur if a process is stopped via SIGSTOP while a thread is running or runnable but before it has set TDF_SBDRY.

MFC r231975:

2012-04-02T19:06:28Z

Make vnode_if.awk parse vnode operations with underscores, like VOP_FOO_BAR. Reviewed by: kib

GNU awk does not output escaped newlines in multi-line printc statements. This

2011-03-31T21:33:33Z

leads to compile errors when trying to compile firmware(9) stubs created with gawk, as multiple #include statements end up on the same line. Replace the multi-line printc statement that outputs all of the #includes with one printc per #include. This allows modules compatible with firmware(9) to be cross-built from a Linux machine without requiring the one true awk to be installed. I've intentionally done the minimal set of changes necessary to make gawk produce valid (but not pretty) C code, to reduce the churn and keep fw_stubs.awk as readable as possible. Approved by: emaste (mentor) MFC after: 2 weeks

Add an extra comment to the SDT probes definition. This allows us to get

2010-08-22T11:18:57Z

use '-' in probe names, matching the probe names in Solaris.[1] Add userland SDT probes definitions to sys/sdt.h. Sponsored by: The FreeBSD Foundation Discussed with: rwaston [1]

Flattened Device Tree helper scripts.

2010-06-02T17:22:38Z

Reviewed by: imp Sponsored by: The FreeBSD Foundation

Output a comment on top of each generated file explaining where it came

2009-10-25T09:48:21Z

from.

Rename default to default_function, for compatibility with GNU awk.

2009-10-22T20:57:17Z

(For cross-compiling out-of-tree kernel modules, for example.)

Allow KMOD with hypens and dots.

2009-10-20T11:54:06Z

MFC after: 1 week

- Increase dynamic range of filter coefficients from 28bit to 30bit.

2009-07-05T18:15:06Z

This cause dramatic effect in overall precision and conversion quality by pushing down most aliasing artifacts around -180 dB. Spectrogram analysis/comparison: http://people.freebsd.org/~ariff/z_comparison/z_28vs30/ - Guard against possible 64bit overflow during accumulation process by slightly normalize and saturate sample and coefficient multiplication, possible during extreme 32bit downsampling (eg. 380KHz -> 8KHz) with custom preset that require more than ~7000 taps filter (which is overkill). - Add knobs through FEEDER_RATE_PRESETS to set dynamic range of filter coefficients/accumulator and prefered polynomial interpolator: COEFFICIENT_BIT:X (where 1 <= X <= 30, default: 30) ACCUMULATOR_BIT:X (where 32 <= X <=64, default: 58) INTERPOLATOR:I (where I = ZOH, LINEAR, QUADRATIC, HERMITE, BSPLINE, OPT32X, OPT16X, OPT8X, OPT4X, OPT2X) Approved by: re (kib)

Slightly increase amount of bandwidth of resampling filter for

2009-07-02T10:02:10Z

feeder_rate_quality=3. This have the benefit of reducing aliasing artifacts due to alias masking. Spectrogram analysis: o Old preset (100:36:0.90) http://people.freebsd.org/~ariff/z_comparison/z_q3_old.png o New preset (100:36:0.92): http://people.freebsd.org/~ariff/z_comparison/z_q3_new.png Approved by: re (kib)