| 1 | /*
|
|---|
| 2 | * sys_trace.c - activate / desactivate the context switches trace for a given core
|
|---|
| 3 | *
|
|---|
| 4 | * Author Alain Greiner (c) (2016,2017,2018,2019)
|
|---|
| 5 | *
|
|---|
| 6 | * Copyright (c) UPMC Sorbonne Universites
|
|---|
| 7 | *
|
|---|
| 8 | * This file is part of ALMOS-MKH.
|
|---|
| 9 | *
|
|---|
| 10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it
|
|---|
| 11 | * under the terms of the GNU General Public License as published by
|
|---|
| 12 | * the Free Software Foundation; version 2.0 of the License.
|
|---|
| 13 | *
|
|---|
| 14 | * ALMOS-MKH is distributed in the hope that it will be useful, but
|
|---|
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|---|
| 17 | * General Public License for more details.
|
|---|
| 18 | *
|
|---|
| 19 | * You should have received a copy of the GNU General Public License
|
|---|
| 20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation,
|
|---|
| 21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|---|
| 22 | */
|
|---|
| 23 |
|
|---|
| 24 | #include <hal_kernel_types.h>
|
|---|
| 25 | #include <hal_special.h>
|
|---|
| 26 | #include <printk.h>
|
|---|
| 27 | #include <thread.h>
|
|---|
| 28 | #include <errno.h>
|
|---|
| 29 | #include <shared_syscalls.h>
|
|---|
| 30 | #include <syscalls.h>
|
|---|
| 31 |
|
|---|
| 32 | ///////////////////////////////
|
|---|
| 33 | int sys_trace( bool_t active,
|
|---|
| 34 | cxy_t cxy,
|
|---|
| 35 | lid_t lid )
|
|---|
| 36 | {
|
|---|
| 37 | uint32_t ncores;
|
|---|
| 38 |
|
|---|
| 39 | thread_t * this = CURRENT_THREAD;
|
|---|
| 40 | process_t * process = this->process;
|
|---|
| 41 |
|
|---|
| 42 | #if (DEBUG_SYS_TRACE || CONFIG_INSTRUMENTATION_SYSCALLS)
|
|---|
| 43 | uint64_t tm_start = hal_get_cycles();
|
|---|
| 44 | #endif
|
|---|
| 45 |
|
|---|
| 46 | #if DEBUG_SYS_TRACE
|
|---|
| 47 | if( DEBUG_SYS_TRACE < tm_start )
|
|---|
| 48 | printk("\n[%s] thread[%x,%x] enters / cycle = %d\n",
|
|---|
| 49 | __FUNCTION__, this->process->pid, this->trdid, (uint32_t)tm_start );
|
|---|
| 50 | #endif
|
|---|
| 51 |
|
|---|
| 52 | // check cluster identifier
|
|---|
| 53 | if( cluster_is_active( cxy ) == false )
|
|---|
| 54 | {
|
|---|
| 55 |
|
|---|
| 56 | #if DEBUG_SYSCALLS_ERROR
|
|---|
| 57 | printk("\n[ERROR] in %s : illegal cxy argument %x / thread %x / process %x\n",
|
|---|
| 58 | __FUNCTION__ , cxy , this->trdid , process->pid );
|
|---|
| 59 | #endif
|
|---|
| 60 | this->errno = EINVAL;
|
|---|
| 61 | return -1;
|
|---|
| 62 | }
|
|---|
| 63 |
|
|---|
| 64 | // check core local index
|
|---|
| 65 | ncores = hal_remote_l32( XPTR( cxy , &LOCAL_CLUSTER->cores_nr ) );
|
|---|
| 66 | if( lid >= ncores )
|
|---|
| 67 | {
|
|---|
| 68 |
|
|---|
| 69 | #if DEBUG_SYSCALLS_ERROR
|
|---|
| 70 | printk("\n[ERROR] in %s : illegal lid argument %x / thread %x / process %x\n",
|
|---|
| 71 | __FUNCTION__ , lid , this->trdid , process->pid );
|
|---|
| 72 | #endif
|
|---|
| 73 | this->errno = EINVAL;
|
|---|
| 74 | return -1;
|
|---|
| 75 | }
|
|---|
| 76 |
|
|---|
| 77 | // get local pointer on target core
|
|---|
| 78 | core_t * core = &LOCAL_CLUSTER->core_tbl[lid];
|
|---|
| 79 |
|
|---|
| 80 | // get extended pointer on target scheduler trace field
|
|---|
| 81 | xptr_t trace_xp = XPTR( cxy , &core->scheduler.trace );
|
|---|
| 82 |
|
|---|
| 83 | if ( active ) hal_remote_s32( trace_xp , 1 );
|
|---|
| 84 | else hal_remote_s32( trace_xp , 0 );
|
|---|
| 85 |
|
|---|
| 86 | hal_fence();
|
|---|
| 87 |
|
|---|
| 88 | #if (DEBUG_SYS_TRACE || CONFIG_INSTRUMENTATION_SYSCALLS)
|
|---|
| 89 | uint64_t tm_end = hal_get_cycles();
|
|---|
| 90 | #endif
|
|---|
| 91 |
|
|---|
| 92 | #if DEBUG_SYS_TRACE
|
|---|
| 93 | if( DEBUG_SYS_TRACE < tm_end )
|
|---|
| 94 | printk("\n[%s] thread[%x,%x] exit / cycle %d\n",
|
|---|
| 95 | __FUNCTION__, this->process->pid, this->trdid, (uint32_t)tm_end );
|
|---|
| 96 | #endif
|
|---|
| 97 |
|
|---|
| 98 | #if CONFIG_INSTRUMENTATION_SYSCALLS
|
|---|
| 99 | hal_atomic_add( &syscalls_cumul_cost[SYS_TRACE] , tm_end - tm_start );
|
|---|
| 100 | hal_atomic_add( &syscalls_occurences[SYS_TRACE] , 1 );
|
|---|
| 101 | #endif
|
|---|
| 102 | return 0;
|
|---|
| 103 |
|
|---|
| 104 | } // end sys_trace()
|
|---|
