Setting max CPU consumption

[sc0ttj]

# Limit CPU consumption for this factor when on battery power.
# Value 1 means 50% decrease, 2 means 66%, 3 75% etc.
downclock_on_battery = 0

Given the default max consumption is 100%, does giving a value of 3 mean the program will use max 75% CPU, or max 25% CPU?

I would like to limit my browser to a max of 80% CPU consumption (on whatever core its grinding away on...)

[kernc]

It's decrease, 75% decrease. Based on this code:

xsuspender/src/events.h

Line 10 in f397525

#define FAST_INTERVAL_MSEC 100

xsuspender/src/events.c

Lines 286 to 287 in b73f837

	g_timeout_add_full (
	G_PRIORITY_HIGH_IDLE, FAST_INTERVAL_MSEC, on_downclock_slice, NULL, NULL);

xsuspender/src/events.c

Lines 346 to 353 in b73f837

	// Suspend the process
	kill (pid, SIGSTOP);
	// Signal to raise after so-many time slices
	pair->counter = downclock_slice_counter + entry->rule->downclock_on_battery;
	// Put in "suspended" queue
	downclock_suspended = g_list_prepend (downclock_suspended, pair);

It's a 100ms-sliced timer and a rule of = n means "sleep n cycles for every one work cycle", making 50% the least possible decrease, unfortunately.

[sc0ttj]

Gotcha. Thanks. Close if you like 👍

[kernc]

For a finer grained slice control (e.g. percent), tho alternatives are, on Linux, cgroups, or running a while (true) loop like cpulimit does in a separate thread. PR welcome. 👍