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Signed-off-by: Thomas Graf <tgraf@suug.ch>
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Using a realtime clock is a bad idea: it is affected by any kind of time
change, which can happen when the administrator modifies the system time,
or more simply when a laptop suspends to RAM and then wakes up from sleep.
With the current approach of using a realtime clock:
- if the system time jumps forward (e.g. when resuming after a
suspend-to-RAM), bmon would take 100% CPU and display random graph data
extremely fast, until it "catches up" with the new time.
- if the system time jumps backwards, bmon would freeze until *time*
"catches up" to the point it was before. bmon then (incorrectly)
displays a spike in the graph, because lots of packets have been
sent/received since the last update.
Instead of using gettimeofday(), switch to clock_gettime() with
CLOCK_MONOTONIC on systems that support it. OS X does not provide
clock_gettime(), so this commit also adds a Mach-specific implementation.
This change has been tested on Linux 4.1 with glibc and musl, and on
FreeBSD 10.0-RELEASE-p12.
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Signed-off-by: Thomas Graf <tgraf@suug.ch>
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Signed-off-by: Thomas Graf <tgraf@suug.ch>
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Signed-off-by: Thomas Graf <tgraf@suug.ch>
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Signed-off-by: Thomas Graf <tgraf@suug.ch>
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Signed-off-by: Thomas Graf <tgraf@suug.ch>
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Signed-off-by: Thomas Graf <tgraf@suug.ch>
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Signed-off-by: Thomas Graf <tgraf@suug.ch>
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Signed-off-by: Thomas Graf <tgraf@suug.ch>
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Defaults are fine, no need to clutter sysconfdir with a useless
default config file.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
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Signed-off-by: Žilvinas Valinskas <zilvinas.valinskas@gmail.com>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
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Adds missing AC_CANONICAL_{TARGET,SYSTEM} calls in configure.ac
to initialize ${target_os} and other variables. Without changes
${target_os} is always undefined (an empty string).
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I reckon to add "requires libnl3-dev" instead of only libnl. I was trying to ./configure bmon for about 15 mins without success only because error message was showing me that my system is missing libnl not libnl3 :-(
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