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