Commit graph

659 commits

Author SHA1 Message Date
Erik van der Kouwe
03a7d0e8ae Add cttybaud boot monitor variable to control speed of serial console (combine with ctty 0) 2011-03-16 12:25:10 +00:00
Arun Thomas
25a790a631 VM and kernel support for ELF 2011-02-26 23:00:55 +00:00
David van Moolenbroek
61ad5f9b94 Kernel: small comment fix (Bug#562, reported by Ryan Riley) 2011-02-25 16:46:30 +00:00
Ben Gras
c6e6aa8850 mark forked process as such in the kernel p_name
. helps debugging output; you can see the difference
    between parent and child easily (it's sometimes 
    confusing to see an expected endpoint number with
    an unexpected name, i.e. before exec())
  . when processes crash after fork and before exec, it's
    an instant hint that that's what's going on, instead of
    it being the parent (endpoint numbers don't usually convey
    this)
  . name returns to 'normal' after exec(), so *F isn't visible
    normally at all. (Except for for RS which forks apparently.)
2011-02-21 15:05:32 +00:00
Ben Gras
07bfb4f4e4 kernel - account for kernel cpu time (ipc, kcalls) in caller 2011-02-08 13:58:32 +00:00
Ben Gras
b2d1109737 kernel - change print*() functions for ipc to generic ipc hook functions.
- used to implement ipc stats tracking code
2011-02-08 13:54:33 +00:00
Gianluca Guida
fa59fc6eb4 Move shared headers in common/include
Headers that will be shared between old includes and NetBSD-like includes
are moved into common/include tree. They are still copied in /usr/include
in 'make includes', so compilation and programs aren't be affected.
2011-02-06 22:59:02 +00:00
Ben Gras
95702f970b kernel - doesn't do lock timings any more 2011-02-04 13:42:17 +00:00
Ben Gras
dc1cc91df1 <ansi.h> -> <minix/ansi.h> 2011-01-28 11:35:02 +00:00
Arun Thomas
6e86430130 Remove code for kernel task stack initialization
We no longer have kernel tasks, so this code is unnecessary
2011-01-27 12:18:33 +00:00
David van Moolenbroek
9c7dcbfec3 Kernel: fix clearing IPC references resulting in system crash 2011-01-18 10:18:08 +00:00
David van Moolenbroek
efca30b081 Kernel: fix notification delivery to non-ANY receivers 2011-01-07 17:04:43 +00:00
David van Moolenbroek
5d8d5e0c3a change bitchunk_t from 16-bit to 32-bit 2010-12-21 10:44:45 +00:00
Arun Thomas
361f377493 Fix multiboot for ACK-built images
Move the profiling buffer to the end of the data segment
2010-12-17 13:47:11 +00:00
David van Moolenbroek
b6f3b7e7f6 Kernel: statistical profiling fixes
- create name entries for forked processes as well;
- create name entries only for system processes.
2010-12-16 09:46:26 +00:00
David van Moolenbroek
a7285dfabc Kernel/RS: fix permission computation with 32+ system processes 2010-12-07 10:32:42 +00:00
Erik van der Kouwe
cbf7d8f735 Fix missing parenthesis (suggested by Antoine Leca) 2010-11-29 08:30:30 +00:00
Ben Gras
d87559f9b9 Fix for objdir feature of BSD make
contributed by Antoine Leca.
2010-11-24 13:44:42 +00:00
Arun Thomas
cfc1fe2ead kernel: Use LIBDIR var in Makefile
Instead of using a hard-coded path, use the LIBDIR variable so
the library path can be overridden.
2010-11-19 10:28:17 +00:00
Tomas Hruby
3ff6f21b51 kernel/debug.c includes u64.h (fix) 2010-11-18 15:12:01 +00:00
Ben Gras
f3e1b1c226 Updated some CLEANFILES macros in Makefiles. 2010-11-17 14:27:23 +00:00
Arun Thomas
f0ab18377d GCC/clang: int64 routines in C 2010-11-12 18:38:10 +00:00
Ben Gras
fd2b22474f update for releases with git. 2010-11-11 02:00:12 +00:00
Arun Thomas
aaaad89244 Use int64 functions consistently
Instead of manipulating the u64_t type directly, use the
ex64hi()/ex64lo()/make64() functions.
2010-11-07 23:35:29 +00:00
Ben Gras
515e8d075f kernel: limit stacktrace depth to 50.
- Unlikely to discard useful information and avoids long
    system lockups on machines configured to print system output to serial.
2010-11-02 21:27:04 +00:00
Tomas Hruby
ac780f36a0 sys_getcpuinfo() 2010-10-26 21:07:50 +00:00
Tomas Hruby
c9bfb13cdb Kernel keeps information about each cpu
- kernel maintains a cpu_info array which contains various
  information about each cpu as filled when each cpu boots

- the information contains idetification, features etc.
2010-10-26 21:07:27 +00:00
Tomas Hruby
9e01a83636 SMP - reduced TLB flushing
- flush TLB of processes only if the page tables has been changed and
  the page tables of this process are already loaded on this cpu which
  means that there might be stale entries in TLB. Until now SMP was
  always flushing TLB to make sure everything is consistent.
2010-10-25 16:21:23 +00:00
Tomas Hruby
5b832396f5 if verbore=1 tell us who registers which irq handler
- a useful piece of information when debugging
2010-10-21 17:07:12 +00:00
Tomas Hruby
98c93e76d7 Zero no more hardwired as BSP apic id
- the BSP apic id is written in the io apic redirection entries to
  deliver the interrupts to BSP
2010-10-21 17:07:07 +00:00
Tomas Hruby
a1eefc013e single shot timer interrupts fix
- accidentaly this wasn't part of the SMP merge and the implementation
  remained uncomplete with the timer keeping ticking periodically

- APIC timer is set for a signel shot and restarted everytime it
  expires. This way we can keep the AP's trully idle

- the timer is restarted a little later before leaving to userspace

- LAPIC_TIMER_ICR is written before LAPIC_LVTTR so the newest value is
  used
2010-10-21 17:07:01 +00:00
Tomas Hruby
ebbc730fc3 spurious and error interrupt apic handlers
- fixed spurious and error interrupt handlers

- not to hog the system the warning isn't reported every time, just
  once every 100 times, similarly for the spurious PIC interrupts
2010-10-19 17:07:21 +00:00
Tomas Hruby
f42b90806a BSP apic id
- BSP apic id used uninitialized causes problems
2010-10-19 17:07:19 +00:00
Tomas Hruby
e6b1a30a26 panic in dummy apic handlers
- as panic can do the same as printf now, let's rather panic when a
  dummy apic interrupt vector handler is hit
2010-10-19 17:07:17 +00:00
Tomas Hruby
2419ab589d Fixed BKL statistics 2010-10-19 17:07:11 +00:00
Tomas Hruby
8145b458d6 A klib.S include fix
- by Antoine Leca
2010-10-15 22:21:01 +00:00
Ben Gras
c521f2a138 kernel: fix idle time accounting. 2010-10-04 19:12:55 +00:00
Tomas Hruby
1786291e32 Watchdog and kernel profiling for AMD
- a different set of MSRs and performance counters is used on AMD

- when initializing NMI watchdog the test for Intel architecture
  performance counters feature only applies to Intel now

- NMI is enabled if the CPU belongs to a family which has the
  performance counters that we use
2010-09-23 14:42:30 +00:00
Tomas Hruby
8eece1c00c CPU type detection
- sometimes the system needs to know precisely on what type of cpu is
  running. The cpu type id detected during arch specific
  initialization and kept in the machine structure for later use.

- as a side-effect the information is exported to userland
2010-09-23 14:42:19 +00:00
Tomas Hruby
ef92583c3a Busy idle loop when profiling
- the Intel architecture cycle counter (performance counter) does not
  count when the CPU is idle therefore we use busy loop instead of
  halting the cpu when there is nothing to schedule

- the downside is that handling interrupts may be accounted as idle
  time if a sample is taken before we get out of the nested trap and
  pick a new process
2010-09-23 10:49:52 +00:00
Tomas Hruby
d2b56f60da sprofile exports kernel sample entries
- in case of kernel hit while proc_ptr is IDLE, account for idle time
  instead of taking kernel sample
2010-09-23 10:49:50 +00:00
Tomas Hruby
87c576584d Internal 64M buffer for profiling
- when profiling is compiled in kernel includes a 64M buffer for
  sample

- 64M is the default used by profile tool as its buffer

- when using nmi profiling it is not possible to always copy sample
  stright to userland as the nmi may (and does) happen in bad moments

- reduces sampling overhead as samples are copied out only when
  profiling stops
2010-09-23 10:49:48 +00:00
Tomas Hruby
e63b85a50b NMI sampling
- if profile --nmi kernel uses NMI watchdog based sampling based on
  Intel architecture performance counters

- using NMI makes kernel profiling possible

- watchdog kernel lockup detection is disabled while sampling as we
  may get unpredictable interrupts in kernel and thus possibly many
  false positives

- if watchdog is not enabled at boot time, profiling enables it and
  turns it of again when done
2010-09-23 10:49:45 +00:00
Tomas Hruby
db12229ce3 New profile protocol
- when kernel profiles a process for the first time it saves an entry
  describing the process [endpoint|name]

- every profile sample is only [endpoint|pc]

- profile utility creates a table of endpoint <-> name relations and
  translates endpoints of samples into names and writing out the
  results to comply with the processing tools

- "task" endpoints like KERNEL are negative thus we must cast it to
  unsigned when hashing
2010-09-23 10:49:39 +00:00
Tomas Hruby
123a968be3 32bit process flags
- we are running out of space in 16bit flags
2010-09-23 10:49:36 +00:00
Ben Gras
82d576c9ca enable_fpu_exception() - only write cr0 if bit isn't already on.
(NMI profiling results indicate this both is relatively expensive and
happens a lot unnecessarily if the fpu is in use.)
2010-09-22 14:31:06 +00:00
Tomas Hruby
2d1c8849d8 Remove unnecessary TLB flushes
- this should be only for SMP
2010-09-22 08:01:36 +00:00
Tomas Hruby
08bf4dec4f Fixed comments in watchdog 2010-09-19 23:23:44 +00:00
Tomas Hruby
e9ecba9fc7 fix - forgotten debug print 2010-09-19 15:54:31 +00:00
Tomas Hruby
a665ae3de1 Userspace scheduling - exporting stats
- contributed by Bjorn Swift

- adds process accounting, for example counting the number of messages
  sent, how often the process was preemted and how much time it spent
  in the run queue. These statistics, along with the current cpu load,
  are sent back to the user-space scheduler in the Out Of Quantum
  message.

- the user-space scheduler may choose to make use of these statistics
  when making scheduling decisions. For isntance the cpu load becomes
  especially useful when scheduling on multiple cores.
2010-09-19 15:52:12 +00:00