Gracefully degrade under load, fixes #2
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Martinez
parent
79b47e1130
commit
3358c807a0
1 changed files with 120 additions and 110 deletions
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@ -268,14 +268,15 @@ class PathPart(Part):
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"""
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/path/to/cwd
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Contructs a list of Dirs from the root to CWD. When fit is called, some Dirs may be shortened.
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Contructs a list of Dirs from the root to CWD. When shrink_fit is called, some Dirs may be shortened.
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"""
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def __init__(self, settings):
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def __init__(self, settings, overloaded):
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Part.__init__(self)
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self.term_width = settings.term_width
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self.dirs = []
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homes = dict(list_homes())
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homes = {} if overloaded else dict(list_homes())
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dirs = settings.cwd.split("/")[1:]
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path = ""
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@ -490,126 +491,135 @@ class StatsPart(Part):
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# tasks
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self.fragments.append("%d " %(sysload.tasks_total))
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# memory (and swap, if used)
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mem_total = 0
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mem_free = 0
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swap_total = 0
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swap_free = 0
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# MemAvailable is not available on <linux-3.14 and we'll bitch about that
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old_linux = True
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with open("/proc/meminfo") as f:
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for line in f:
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if line.startswith("MemTotal"):
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mem_total = int(line.split()[1]) * 1024
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elif line.startswith("MemAvailable"):
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mem_free = int(line.split()[1]) * 1024
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old_linux = False
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elif line.startswith("SwapTotal"):
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swap_total = int(line.split()[1]) * 1024
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elif line.startswith("SwapFree"):
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swap_free = int(line.split()[1]) * 1024
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if old_linux:
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if sysload.load1 >= settings.load_error:
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self.fragments.append(" | ")
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self.fragments.append(style_color(COLOR_ERROR))
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self.fragments.append(style_bold())
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self.fragments.append("❌ <linux-3.14 ❌")
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else:
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self.fragments.append(style_color(COLOR_MEMSWAP))
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self.fragments.append("m")
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self.fragments.append(style_bold())
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self.fragments.append(style_color(settings.get_space_color(mem_free, mem_total)))
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mem_free_si = si_number(mem_free)
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self.fragments.append(space_string(mem_free) %(mem_free_si[0], mem_free_si[1]))
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self.fragments.append(style_reset())
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if swap_total - swap_free > 2**20:
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self.fragments.append(style_color(COLOR_MEMSWAP))
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self.fragments.append(" s")
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self.fragments.append(style_bold())
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self.fragments.append(style_color(settings.get_space_color(swap_free, swap_total)))
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swap_free_si = si_number(swap_free)
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self.fragments.append(space_string(swap_free) %(swap_free_si[0], swap_free_si[1]))
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self.fragments.append("⚠ OVERLOAD ⚠ ")
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self.fragments.append(style_reset())
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# mountpoints
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names = []
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first_mountpoint = True
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with open("/proc/self/mounts") as f:
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for line in f:
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_, dir, type, options, *rest = line.split()
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# skip non-storage mounts
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if type in MOUNT_IGNORE_FS:
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continue
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if any([dir.startswith(d) for d in MOUNT_IGNORE_DIR]):
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continue
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if "rw" not in options.split(","):
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continue
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# /proc/self/mounts uses a literal \040 string to escape spaces
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dir = dir.replace("\\040", " ")
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basename = os.path.basename(dir)
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if basename:
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short_name = " "
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else:
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# memory (and swap, if used)
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mem_total = 0
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mem_free = 0
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swap_total = 0
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swap_free = 0
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# MemAvailable is not available on <linux-3.14 and we'll bitch about that
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old_linux = True
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with open("/proc/meminfo") as f:
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for line in f:
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if line.startswith("MemTotal"):
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mem_total = int(line.split()[1]) * 1024
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elif line.startswith("MemAvailable"):
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mem_free = int(line.split()[1]) * 1024
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old_linux = False
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elif line.startswith("SwapTotal"):
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swap_total = int(line.split()[1]) * 1024
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elif line.startswith("SwapFree"):
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swap_free = int(line.split()[1]) * 1024
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if old_linux:
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self.fragments.append(style_color(COLOR_ERROR))
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self.fragments.append(style_bold())
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self.fragments.append("⚠ <linux-3.14 ⚠")
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else:
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self.fragments.append(style_color(COLOR_MEMSWAP))
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self.fragments.append("m")
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self.fragments.append(style_bold())
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self.fragments.append(style_color(settings.get_space_color(mem_free, mem_total)))
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mem_free_si = si_number(mem_free)
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self.fragments.append(space_string(mem_free) %(mem_free_si[0], mem_free_si[1]))
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self.fragments.append(style_reset())
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if swap_total - swap_free > 2**20:
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self.fragments.append(style_color(COLOR_MEMSWAP))
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self.fragments.append(" s")
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self.fragments.append(style_bold())
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self.fragments.append(style_color(settings.get_space_color(swap_free, swap_total)))
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swap_free_si = si_number(swap_free)
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self.fragments.append(space_string(swap_free) %(swap_free_si[0], swap_free_si[1]))
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self.fragments.append(style_reset())
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# mountpoints
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names = []
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first_mountpoint = True
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with open("/proc/self/mounts") as f:
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for line in f:
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_, dir, type, options, *rest = line.split()
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for c in basename:
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short_name += c
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if short_name not in names:
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break
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else:
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short_name = " /"
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# handle btrfs separately
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if type == "btrfs":
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btrfs_raw = command(["/sbin/btrfs", "fi", "usage", "-b", dir])
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for line in btrfs_raw.split("\n"):
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if "Device size" in line:
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stor_total = int(line.split()[-1])
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elif "Free" in line:
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stor_free = int(line.split()[-3])
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break
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else:
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try:
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stat = os.statvfs(dir)
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except PermissionError:
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# skip non-storage mounts
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if type in MOUNT_IGNORE_FS:
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continue
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stor_total = stat.f_blocks * stat.f_bsize
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stor_free = stat.f_bavail * stat.f_bsize
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# ignore virtual filesystems
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if stor_total == 0:
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continue
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if first_mountpoint:
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self.fragments.append(" |")
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first_mountpoint = False
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self.fragments.append(short_name)
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self.fragments.append(style_bold())
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self.fragments.append(style_color(settings.get_space_color(stor_free, stor_total)))
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stor_free_si = si_number(stor_free)
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self.fragments.append(space_string(stor_free) %(stor_free_si[0], stor_free_si[1]))
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self.fragments.append(style_reset())
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if any([dir.startswith(d) for d in MOUNT_IGNORE_DIR]):
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continue
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if "rw" not in options.split(","):
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continue
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# /proc/self/mounts uses a literal \040 string to escape spaces
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dir = dir.replace("\\040", " ")
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basename = os.path.basename(dir)
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if basename:
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short_name = " "
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for c in basename:
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short_name += c
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if short_name not in names:
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break
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else:
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short_name = " /"
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# handle btrfs separately
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if type == "btrfs":
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btrfs_raw = command(["/sbin/btrfs", "fi", "usage", "-b", dir])
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for line in btrfs_raw.split("\n"):
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if "Device size" in line:
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stor_total = int(line.split()[-1])
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elif "Free" in line:
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stor_free = int(line.split()[-3])
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break
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else:
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try:
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stat = os.statvfs(dir)
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except PermissionError:
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continue
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stor_total = stat.f_blocks * stat.f_bsize
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stor_free = stat.f_bavail * stat.f_bsize
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# ignore virtual filesystems
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if stor_total == 0:
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continue
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if first_mountpoint:
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self.fragments.append(" |")
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first_mountpoint = False
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self.fragments.append(short_name)
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self.fragments.append(style_bold())
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self.fragments.append(style_color(settings.get_space_color(stor_free, stor_total)))
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stor_free_si = si_number(stor_free)
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self.fragments.append(space_string(stor_free) %(stor_free_si[0], stor_free_si[1]))
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self.fragments.append(style_reset())
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if __name__ == "__main__":
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settings = Settings(sys.argv)
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sysload = Sysload()
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overloaded = sysload.load1 >= settings.load_error
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lp = LoginPart(settings, sysload)
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pp = PathPart(settings)
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gp = GitPart()
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pp = PathPart(settings, overloaded)
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gp = "" if overloaded else GitPart()
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vp = VirtualEnvPart()
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wp = WineprefixPart()
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pad = Padding(settings.term_width)
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