Date: Tue, 13 Jan 2009 16:33:10 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/tools/sched schedgraph.py Message-ID: <200901131633.n0DGXEBU045240@repoman.freebsd.org>
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jhb 2009-01-13 16:33:10 UTC
FreeBSD src repository
Modified files:
tools/sched schedgraph.py
Log:
SVN rev 187155 on 2009-01-13 16:33:10Z by jhb
- Add some rudimentary support for sorting the list of event sources
(threads, CPU load counters, etc.). Each source is tagged with a group
and an order similar to the SYSINIT SI_SUB_* and SI_ORDER_*. After
the file is parsed, all the sources are then sorted. Currently, the only
affects of this are that the CPU loads are now sorted by CPU ID (so
CPU 0 is always first). However, this makes it easier to add new types
of event sources in the future and have them all clustered together
instead of intertwined with threads.
- Python lists perform insertions at the tail much faster than insertions
at the head. For a trace that had a lot of events for a single event
source, the constant insertions of new events to the head of the
per-source event list caused a noticable slow down. To compensate,
append new events to the end of the list during parsing and then
reverse the list prior to drawing.
- Somewhere in the tkinter internals the coordinates of a canvas are
stored in a signed 32-bit integer. As a result, if an the box for
an event spans 2^31, it would actually end up having a negative
X offset at one end. The result was a single box that covered the
entire event source. Kris worked around this for some traces by
bumping up the initial ticks/pixel ratio from 1 to 10. However, a
divisor of 10 can still be too small for large tracefiles (e.g.
with 4 million entries). Instead of hardcoding the initial scaling
ratio, calculate it from the time span of the trace file.
- Add support for using the mouse wheel to scroll the graph window
up and down.
Revision Changes Path
1.18 +46 -13 src/tools/sched/schedgraph.py
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