59 lines
2.2 KiB
C
59 lines
2.2 KiB
C
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/*
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* This file is part of Xfce (https://gitlab.xfce.org).
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*
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* zram monitor: local addition, not part of upstream.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES
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* ARE DISCLAIMED.
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*/
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#ifndef _XFCE_SYSTEMLOAD_ZRAM_H_
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#define _XFCE_SYSTEMLOAD_ZRAM_H_
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#include <glib.h>
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/*
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* Physical RAM occupied by all zram devices, in kB.
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* Returns 0 when there is no zram device or the data cannot be read.
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*
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* This is the number that has to be subtracted from "used memory": pages held
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* by zram are counted as used RAM, yet they are not memory of any process -
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* they are the compressed backing store of the swap.
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*/
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gulong read_zram_phys (void);
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/*
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* zram summary across all devices.
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*
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* zram - physical footprint as a percentage of MemTotal (for the bar)
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* phys_kb - physical RAM used, kB (mem_used_total from mm_stat)
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* stored_kb - uncompressed size of the stored pages, kB (orig_data_size)
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* ratio - stored/compressed, 0.0 when nothing is stored
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*
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* Returns 0 on success, -1 when there is no zram device.
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*/
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gint read_zram (gulong *zram, gulong *phys_kb, gulong *stored_kb, gdouble *ratio);
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/*
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* Swap totals EXCLUDING zram devices, in kB, read from /proc/swaps.
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*
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* SwapTotal/SwapFree in /proc/meminfo lump zram together with disk swap, and
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* for zram they report the uncompressed size - a number that corresponds to
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* nothing physical. The real question the swap bar should answer is "how much
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* has spilled onto the disk", and that is what this returns.
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*
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* Returns 0 on success, -1 when /proc/swaps cannot be read.
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*/
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gint read_disk_swap (gulong *total_kb, gulong *used_kb);
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#endif /* _XFCE_SYSTEMLOAD_ZRAM_H_ */
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