Wenn ich ein paar Programme in KDE laufen habe und nichts tue, beanspruchen Xorg und Plasmashell immer noch jeweils etwa 11 % eines CPU-Kerns. kwin_x11nimmt weitere 6 % ein. Zusammen mit anderen Hintergrundjobs komme ich im Leerlauf auf etwa 12 % der Gesamtsystemlast. Das bedeutet, dass der Lüfter meines Laptops nie auf die niedrigste Stufe herunterfährt.
Wie kann ich die Ursache dieser Belastung herausfinden, wenn scheinbar nichts passiert?
strace
strace auf Xorg
Ich habe stracemich Xorgals Root angemeldet und es etwa drei Sekunden lang laufen lassen. In dieser Zeit habe ich 8273 Zeilen Ausgabe abgerufen. Es scheint sich um eine Wiederholung des folgenden Blocks zu handeln:
strace: Process 1255 attached
strace: [ Process PID=1255 runs in x32 mode. ]
strace: [ Process PID=1255 runs in 64 bit mode. ]
writev(58, [{iov_base="Z\3Mg\37+\7\2\"+\7\2\2\235z\0\0\0\0\0008\4\200\7\200\7\0\0008\4\200\7", iov_len=32}], 1) = 32
ioctl(24, DRM_IOCTL_I915_GEM_EXECBUFFER2, 0x7ffd622230e0) = 0
ioctl(24, DRM_IOCTL_I915_GEM_THROTTLE or DRM_IOCTL_RADEON_CP_RESUME, 0) = 0
ioctl(24, DRM_IOCTL_I915_GEM_MADVISE, 0x7ffd62223034) = 0
ioctl(24, DRM_IOCTL_I915_GEM_BUSY, 0x7ffd62222fd0) = 0
ioctl(24, DRM_IOCTL_I915_GEM_MADVISE, 0x7ffd62223040) = 0
getpid() = 1255
epoll_wait(3, [{EPOLLIN, {u32=48152672, u64=48152672}}], 256, 630) = 1
setitimer(ITIMER_REAL, {it_interval={tv_sec=0, tv_usec=5000}, it_value={tv_sec=0, tv_usec=5000}}, NULL) = 0
recvmsg(56, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\224\2\6\0\347_\305\1\16\0\300\1\0\0\0\0\200\0078\4\0\36 \224\4\4\0\347_\305\1"..., iov_len=16384}], msg_iovlen=1, msg_control=[{cmsg_len=24, cmsg_level=SOL_SOCKET, cmsg_type=SCM_RIGHTS, cmsg_data=[106, 107]}], msg_controllen=24, msg_flags=0}, 0) = 40
ioctl(24, DRM_IOCTL_PRIME_FD_TO_HANDLE, 0x7ffd62223f3c) = 0
lseek(106, 0, SEEK_END) = 8388608
ioctl(24, DRM_IOCTL_I915_GEM_GET_TILING, 0x7ffd62223f70) = 0
getpid() = 1255
close(106) = 0
fcntl(107, F_DUPFD_CLOEXEC, 2048) = -1 EINVAL (Invalid argument)
mmap(NULL, 4, PROT_READ|PROT_WRITE, MAP_SHARED, 107, 0) = 0x7fca1cb29000
recvmsg(56, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={tv_sec=0, tv_usec=0}, it_value={tv_sec=0, tv_usec=0}}, NULL) = 0
epoll_wait(3, [{EPOLLIN, {u32=48152672, u64=48152672}}], 256, 627) = 1
setitimer(ITIMER_REAL, {it_interval={tv_sec=0, tv_usec=5000}, it_value={tv_sec=0, tv_usec=5000}}, NULL) = 0
recvmsg(56, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\223\1\22\0\16\0\300\1\347_\305\1\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., iov_len=16384}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 80
ioctl(24, DRM_IOCTL_WAIT_VBLANK, 0x7ffd62224110) = 0
ioctl(24, DRM_IOCTL_WAIT_VBLANK, 0x7ffd62224050) = 0
ioctl(24, DRM_IOCTL_WAIT_VBLANK, 0x7ffd622240f0) = 0
writev(56, [{iov_base="\1 \313\322\0\0\0\0\1\1\0\0\0\0\0\0008\4\200\7\0\0\0\0\0\0\0\0\0\0\0\0", iov_len=32}], 1) = 32
recvmsg(56, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={tv_sec=0, tv_usec=0}, it_value={tv_sec=0, tv_usec=0}}, NULL) = 0
epoll_wait(3, [{EPOLLIN, {u32=48175088, u64=48175088}}, {EPOLLIN, {u32=59512640, u64=59512640}}, {EPOLLIN, {u32=39795904, u64=39795904}}], 256, 623) = 3
read(24, "\1\0\0\0 \0\0\0\21\334\10\0\0\0\0\0c\37\0\0\346\36\t\0\232u\4\0\0\0\0\0", 1024) = 32
ioctl(24, DRM_IOCTL_GEM_CLOSE, 0x7ffd62222928) = 0
Im Folgenden habe ich die Ausgabe sortiert und nur die eindeutigen Zeilen (2341) herausgenommen. Anschließend habe ich Zeilen entfernt, die sich nur durch Zahlen oder String-Argumente unterscheiden, damit man einen Überblick über die Vorgänge hat:
close(106) = 0
close(107) = 0
epoll_wait(3, [], 256, 0) = 0
epoll_wait(3, [{EPOLLIN, {u32=39795904, u64=39795904}}], 256, 0) = 1
epoll_wait(3, [{EPOLLIN, {u32=39795904, u64=39795904}}, {EPOLLIN, {u32=44232592, u64=44232592}}], 256, 299613) = 2
epoll_wait(3, [{EPOLLIN, {u32=39795904, u64=39795904}}, {EPOLLIN, {u32=44232592, u64=44232592}}, {EPOLLIN, {u32=48152672, u64=48152672}}], 256, 0) = 3
epoll_wait(3, [{EPOLLIN, {u32=44232592, u64=44232592}}, {EPOLLIN, {u32=39795904, u64=39795904}}, {EPOLLIN, {u32=59512640, u64=59512640}}, {EPOLLIN, {u32=48167840, u64=48167840}}, {EPOLLIN, {u32=48298384, u64=48298384}}, {EPOLLIN, {u32=48175088, u64=48175088}}], 256, 0) = 6
fcntl(107, F_DUPFD_CLOEXEC, 2048) = -1 EINVAL (Invalid argument)
getpid() = 1255
ioctl(24, DRM_IOCTL_GEM_CLOSE, 0x7ffd62222928) = 0
ioctl(24, DRM_IOCTL_I915_GEM_BUSY, 0x7ffd62222fd0) = 0
ioctl(24, DRM_IOCTL_I915_GEM_CREATE, 0x7ffd62223800) = 0
ioctl(24, DRM_IOCTL_I915_GEM_EXECBUFFER2, 0x7ffd622230e0) = 0
ioctl(24, DRM_IOCTL_I915_GEM_GET_TILING, 0x7ffd62223f70) = 0
ioctl(24, DRM_IOCTL_I915_GEM_MADVISE, 0x7ffd62222b84) = 0
ioctl(24, DRM_IOCTL_I915_GEM_PWRITE, 0x7ffd62223820) = 0
ioctl(24, DRM_IOCTL_I915_GEM_SET_DOMAIN, 0x7ffd622237f4) = 0
ioctl(24, DRM_IOCTL_I915_GEM_THROTTLE or DRM_IOCTL_RADEON_CP_RESUME, 0) = 0
ioctl(24, DRM_IOCTL_I915_GEM_THROTTLE or DRM_IOCTL_RADEON_CP_RESUME, 0) = ? ERESTARTSYS (To be restarted if SA_RESTART is set)
ioctl(24, DRM_IOCTL_MODE_DIRTYFB, 0x7ffd622240b0) = 0
ioctl(24, DRM_IOCTL_MODE_SETGAMMA, 0x7ffd62224250) = 0
ioctl(24, DRM_IOCTL_PRIME_FD_TO_HANDLE, 0x7ffd62223f3c) = 0
ioctl(24, DRM_IOCTL_WAIT_VBLANK, 0x7ffd62224050) = 0
ioctl(24, DRM_IOCTL_WAIT_VBLANKstrace: Process 1255 detached
lseek(106, 0, SEEK_END) = 10485760
mmap(NULL, 4, PROT_READ|PROT_WRITE, MAP_SHARED, 107, 0) = 0x7fca1cb29000
mremap(0x7fca1604b000, 126976, 20480, MREMAP_MAYMOVE) = 0x7fca1604b000
munmap(0x7fca16219000, 524288) = 0
read(24, "\1\0\0\0 \0\0\0000\334\10\0\0\0\0\0d\37\0\0\207L\4\0@X\7\0\0\0\0\0", 1024) = 32
read(27, "\0", 40) = 1
recvmsg(101, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(101, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="+\0\1\0", iov_len=16384}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 4
recvmsg(101, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\22\0\n\0\6\0\0\6'\0\0\0\37\0\0\0\10\21\4\0\20\0\0\0~/home/m"..., iov_len=16384}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 68
recvmsg(56, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(56, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\16\0\2\0!\0\300\1", iov_len=16384}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 8
recvmsg(56, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\16\0\2\0\6\0\0\6(\0\4\0\6\0\0\6\1\1\0\0\0\0\0\0", iov_len=16384}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 24
recvmsg(56, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\223\1\22\0\243-\304\1Y`\305\1\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., iov_len=16384}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 72
recvmsg(56, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\224\2\6\0z`\305\1\16\0\300\1\0\0\0\0\200\0078\4\0\36 \224\4\4\0z`\305\1"..., iov_len=16384}], msg_iovlen=1, msg_control=[{cmsg_len=24, cmsg_level=SOL_SOCKET, cmsg_type=SCM_RIGHTS, cmsg_data=[106, 107]}], msg_controllen=24, msg_flags=0}, 0) = 40
rt_sigreturn({mask=[]}) = 0
setitimer(ITIMER_REAL, {it_interval={tv_sec=0, tv_usec=0}, it_value={tv_sec=0, tv_usec=0}}, NULL) = 0
--- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---
strace: Process 1255 attached
strace: [ Process PID=1255 runs in 64 bit mode. ]
strace: [ Process PID=1255 runs in x32 mode. ]
writev(101, [{iov_base="\0026\353\7\241\250z\0\1\1\0\0\6\0\0\6\0\0\0\0\24\n4\1\224\2\27\1\4\0\1\0", iov_len=32}], 1) = 32
writev(56, [{iov_base="4d4058d4-7455-406b-b370-76d3c09f"..., iov_len=36}], 1) = 36
writev(56, [{iov_base="~/home/mu : bash \342\200\224 Konsole", iov_len=28}], 1) = 28
writev(56, [{iov_base="konsole\0konsole\0", iov_len=16}], 1) = 16
writev(56, [{iov_base="org.kde.konsole", iov_len=15}, {iov_base="\0", iov_len=1}], 2) = 16
writev(58, [{iov_base="~/home/mu : bash \342\200\224 Konsole", iov_len=28}], 1) = 28
writev(58, [{iov_base="k\246z\0", iov_len=4}], 1) = 4
strace auf plasmashell
Auch auf gab es eine hohe Belastung plasmashell, der Anfang vom straceist folgender:
strace: Process 7633 attached
futex(0x7ffd1144c0f8, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0x556189417398, FUTEX_WAKE_PRIVATE, 1) = 0
munmap(0x7f9c94603000, 4) = 0
ioctl(16, DRM_IOCTL_GEM_CLOSE, 0x7ffd1144bfc8) = 0
ioctl(16, DRM_IOCTL_I915_GEM_MADVISE, 0x7ffd1144c094) = 0
ioctl(16, DRM_IOCTL_I915_GEM_MADVISE, 0x7ffd1144c084) = 0
ioctl(16, DRM_IOCTL_I915_GEM_MADVISE, 0x7ffd1144c094) = 0
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="6\0\2\0\315\5\350\1\206\21\2\0\316\5\350\1\223\3\4\0\314\5\350\1kf\344\1\0\0\0\0"..., iov_len=64}], 1) = 64
futex(0x5561894173e8, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x556189417398, FUTEX_WAKE_PRIVATE, 1) = 1
poll([{fd=3, events=POLLIN}], 1, -1) = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\1\0\336_\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., iov_len=4096}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 64
futex(0x5561894173ec, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x556189417398, FUTEX_WAKE_PRIVATE, 1) = 1
memfd_create("xshmfence", MFD_CLOEXEC|MFD_ALLOW_SEALING) = 31
ftruncate(31, 4) = 0
mmap(NULL, 4, PROT_READ|PROT_WRITE, MAP_SHARED, 31, 0) = 0x7f9c94603000
ioctl(16, DRM_IOCTL_I915_GEM_BUSY, 0x7ffd1144bd70) = 0
ioctl(16, DRM_IOCTL_I915_GEM_CREATE, 0x7ffd1144bde0) = 0
ioctl(16, DRM_IOCTL_I915_GEM_SET_TILING, 0x7ffd1144bd30) = 0
ioctl(16, DRM_IOCTL_I915_GEM_SET_DOMAIN, 0x7ffd1144bdd4) = 0
ioctl(16, DRM_IOCTL_PRIME_HANDLE_TO_FD, 0x7ffd1144bf1c) = 0
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\224\2\6\0\320\5\350\1\16\0\340\1\0\0\0\0\200\0078\4\0\36 \224\4\4\0\320\5\350\1"..., iov_len=40}], msg_iovlen=1, msg_control=[{cmsg_len=24, cmsg_level=SOL_SOCKET, cmsg_type=SCM_RIGHTS, cmsg_data=[34, 31]}], msg_controllen=24, msg_flags=0}, 0) = 40
close(34) = 0
close(31) = 0
ioctl(16, DRM_IOCTL_I915_GEM_MADVISE, 0x7ffd1144bda0) = 0
ioctl(16, DRM_IOCTL_I915_GEM_SET_TILING, 0x7ffd1144bcf0) = 0
ioctl(16, DRM_IOCTL_I915_GEM_MADVISE, 0x7ffd1144bd10) = 0
ioctl(16, DRM_IOCTL_I915_GEM_MADVISE, 0x7ffd1144bda0) = 0
ioctl(16, DRM_IOCTL_I915_GEM_SET_TILING, 0x7ffd1144bcf0) = 0
getpid() = 7633
getpid() = 7633
ioctl(16, DRM_IOCTL_I915_GEM_EXECBUFFER2, 0x7ffd1144c380) = 0
ioctl(16, DRM_IOCTL_I915_GEM_WAIT or DRM_IOCTL_RADEON_GEM_OP, 0x7ffd1144c330) = 0
ioctl(16, DRM_IOCTL_I915_GEM_MADVISE, 0x7ffd1144c2f4) = 0
ioctl(16, DRM_IOCTL_I915_GEM_MADVISE, 0x7ffd1144c2d4) = 0
ioctl(16, DRM_IOCTL_I915_GEM_BUSY, 0x7ffd1144c270) = 0
ioctl(16, DRM_IOCTL_I915_GEM_MADVISE, 0x7ffd1144c2e0) = 0
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="\223\1\22\0\16\0\340\1\320\5\350\1\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., iov_len=72}], 1) = 72
getpid() = 7633
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="\16\0\2\0kf\344\1", iov_len=8}], 1) = 8
futex(0x556189417398, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x556189417398, FUTEX_WAKE_PRIVATE, 1) = 0
munmap(0x7f9c94603000, 4) = 0
ioctl(16, DRM_IOCTL_GEM_CLOSE, 0x7ffd1144bfc8) = 0
ioctl(16, DRM_IOCTL_I915_GEM_MADVISE, 0x7ffd1144c094) = 0
ioctl(16, DRM_IOCTL_I915_GEM_MADVISE, 0x7ffd1144c084) = 0
ioctl(16, DRM_IOCTL_I915_GEM_MADVISE, 0x7ffd1144c094) = 0
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="6\0\2\0\320\5\350\1\206\21\2\0\321\5\350\1\223\3\4\0\317\5\350\1\16\0\340\1\0\0\0\0"..., iov_len=64}], 1) = 64
futex(0x7ffd1144bf48, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
futex(0x556189417398, FUTEX_WAKE_PRIVATE, 1) = 0
memfd_create("xshmfence", MFD_CLOEXEC|MFD_ALLOW_SEALING) = 31
ftruncate(31, 4) = 0
mmap(NULL, 4, PROT_READ|PROT_WRITE, MAP_SHARED, 31, 0) = 0x7f9c94603000
ioctl(16, DRM_IOCTL_I915_GEM_CREATE, 0x7ffd1144bde0) = 0
ioctl(16, DRM_IOCTL_I915_GEM_SET_TILING, 0x7ffd1144bd30) = 0
Plasmashell hat mir 16008 Zeilen in etwa drei Sekunden geliefert und reagierte wirklich langsam auf Eingaben.
xrandr --aktuell
Dies ist die Ausgabe, xrandr --currentwenn Plasmashell einen ganzen CPU-Kern beansprucht:
Screen 0: minimum 320 x 200, current 3000 x 1920, maximum 8192 x 8192
LVDS-1 connected (normal left inverted right x axis y axis)
1366x768 60.02 +
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
800x600 60.00 60.32 56.25
700x525 59.98
640x512 60.02
640x480 60.00 59.94
512x384 60.00
400x300 60.32 56.34
320x240 60.05
VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 connected 1080x1920+1920+0 left (normal left inverted right x axis y axis) 509mm x 286mm
1920x1080 60.00*+
1600x900 60.00
1280x1024 75.02 60.02
1152x864 75.00
1024x768 75.03 60.00
800x600 75.00 60.32
640x480 75.00 59.94
720x400 70.08
HDMI-2 disconnected (normal left inverted right x axis y axis)
HDMI-3 disconnected (normal left inverted right x axis y axis)
DP-2 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 509mm x 286mm
1920x1080 60.00*+
1600x900 60.00
1280x1024 75.02 60.02
1152x864 75.00
1024x768 75.03 60.00
800x600 75.00 60.32
640x480 75.00 59.94
720x400 70.08
DP-3 disconnected (normal left inverted right x axis y axis)