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| author | Damien Zammit <damien@zamaudio.com> | 2023-07-22 04:50:50 +0000 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2023-08-05 01:51:39 +0200 |
| commit | 5e25bd3cbd2be0e510d53e2b35ddb2c54a8e0ac5 (patch) | |
| tree | 80f10399a7ed8c868587ff2222e21571b7f79e2a | |
| parent | 0f59ffa714ec2ba17cd77f2bc57d4eab4e362535 (diff) | |
| download | gnumach-5e25bd3cbd2be0e510d53e2b35ddb2c54a8e0ac5.tar.gz gnumach-5e25bd3cbd2be0e510d53e2b35ddb2c54a8e0ac5.tar.bz2 gnumach-5e25bd3cbd2be0e510d53e2b35ddb2c54a8e0ac5.zip | |
Add timing info to MACH_LOCK_MON lock monitoring
Booting to beginning of bootstrap with different number of cpus
and checking the lock statistics where TIME is in milliseconds:
Set MACH_LOCK_MON to 1 in configfrag.ac, then
Configure options
--enable-ncpus=8 --enable-kdb --enable-apic --disable-linux-groups
-smp 1
db{0}> show all slocks
SUCCESS FAIL MASKED STACK TIME LOCK/CALLER
4208 0/0 4208/100 2/0 7890/1 0xc1098f54(c11847c8)
1 0/0 1/100 0/0 7890/7890 0x315(c11966e0)
30742 0/0 0/0 2106/0 160/0 0xf52a9e2c(f5a07958)
30742 0/0 0/0 0/0 140/0 0xf52a5e2c(f5a07b10)
149649 0/0 3372/2 1/0 120/0 0xc118a590(c118a9d4)
16428 0/0 0/0 1/0 90/0 0xf52a5dd0(f5a07ab8)
14345 0/0 0/0 18/0 80/0 0xf64afe2c(f64aa488)
1791 0/0 0/0 1/0 80/0 0xf52a3e70(f5e57f70)
17331 total locks, 0 empty buckets
2320150 0/0 455490/19 11570533/4 17860/0 0xc10a4580(c10a4580)
-smp 2
(could not wait until booted)
db{0}> show all slocks
SUCCESS FAIL MASKED STACK TIME LOCK/CALLER
47082 0/0 47082/100 0/0 413940/8 0xc1098f54(c11847c8)
2 0/0 2/100 0/0 413940/206970 0x6ede(c11966e0)
47139 0/0 0/0 2106/0 4670/0 0xc119edec(f5e409b0)
132895 3/0 3372/2 1/0 4580/0 0xc118a590(c118a9d4)
118313 0/0 2/0 0/0 3660/0 0xc1098ec4(c1189f80)
183233 1/0 1714/0 2/0 2290/0 0xc1098e54(c118aa8c)
14357 0/0 0/0 1878/0 1200/0 0xf52a4de0(f5e40a60)
14345 0/0 0/0 18/0 1200/0 0xf52a4dec(f528f488)
16910 total locks, 0 empty buckets
2220850 455/0 485391/21 11549793/5 879030/0 0xc10a4580(c10a4580)
Message-Id: <20230722045043.1579134-1-damien@zamaudio.com>
| -rw-r--r-- | kern/lock_mon.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/kern/lock_mon.c b/kern/lock_mon.c index b8216788..3ca4592c 100644 --- a/kern/lock_mon.c +++ b/kern/lock_mon.c @@ -46,6 +46,7 @@ #include <kern/thread.h> #include <kern/lock.h> #include <kern/printf.h> +#include <kern/mach_clock.h> #include <machine/ipl.h> #include <ddb/db_sym.h> #include <ddb/db_output.h> @@ -56,13 +57,10 @@ def_simple_lock_data(, kdb_lock) def_simple_lock_data(, printf_lock) #if NCPUS > 1 && MACH_LOCK_MON - -#if TIME_STAMP -extern time_stamp_t time_stamp; -#else /* TIME_STAMP */ +#define TIME_STAMP 1 typedef unsigned int time_stamp_t; -#define time_stamp 0 -#endif /* TIME_STAMP */ +/* in milliseconds */ +#define time_stamp (elapsed_ticks * 1000 / hz) #define LOCK_INFO_MAX (1024*32) #define LOCK_INFO_HASH_COUNT 1024 |