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Code Releases Activity

Better signal handler

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This commit is contained in:
Peter Boyle
2025-06-25 18:13:33 +00:00
parent 709f8ae76c
commit b78fc73d19
2 changed files with 148 additions and 40 deletions
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182
Grid/util/Init.cc
View File

@ -295,6 +295,9 @@ void GridBanner(void)
std::cout << std::setprecision(9);
}
int fileno_stdout;
int fileno_stderr;
void Grid_init(int *argc,char ***argv)
{
@ -347,6 +350,12 @@ void Grid_init(int *argc,char ***argv)
if( GridCmdOptionExists(*argv,*argv+*argc,"--debug-signals") ){
Grid_debug_handler_init();
}
if( GridCmdOptionExists(*argv,*argv+*argc,"--debug-heartbeat") ){
Grid_debug_heartbeat();
}
if( GridCmdOptionExists(*argv,*argv+*argc,"--heartbeat") ){
Grid_heartbeat();
}
#if defined(A64FX)
if( GridCmdOptionExists(*argv,*argv+*argc,"--comms-overlap") ){
@ -396,6 +405,9 @@ void Grid_init(int *argc,char ***argv)
fp=freopen(ename.str().c_str(),"w",stderr);
assert(fp!=(FILE *)NULL);
}
fileno_stdout = fileno(stdout);
fileno_stderr = fileno(stderr) ;
////////////////////////////////////////////////////
// OK to use GridLogMessage etc from here on
////////////////////////////////////////////////////
@ -459,7 +471,9 @@ void Grid_init(int *argc,char ***argv)
std::cout<<GridLogMessage<<" --decomposition : report on default omp,mpi and simd decomposition"<<std::endl;
std::cout<<GridLogMessage<<" --debug-signals : catch sigsegv and print a blame report"<<std::endl;
std::cout<<GridLogMessage<<" --debug-stdout : print stdout from EVERY node"<<std::endl;
std::cout<<GridLogMessage<<" --debug-heartbeat : periodic report of backtrace "<<std::endl;
std::cout<<GridLogMessage<<" --debug-mem : print Grid allocator activity"<<std::endl;
std::cout<<GridLogMessage<<" --heartbeat : periodic itimer wakeup "<<std::endl;
std::cout<<GridLogMessage<<" --notimestamp : suppress millisecond resolution stamps"<<std::endl;
std::cout<<GridLogMessage<<std::endl;
std::cout<<GridLogMessage<<"Performance:"<<std::endl;
@ -556,13 +570,49 @@ void GridLogLayout() {
void * Grid_backtrace_buffer[_NBACKTRACE];
#define SIGLOG(A) ::write(fileno_stderr,A,strlen(A));
void sig_print_dig(uint32_t dig)
{
const char *digits[] = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F" };
if ( dig>=0 && dig< 16){
SIGLOG(digits[dig]);
}
}
void sig_print_uint(uint32_t A)
{
sig_print_dig((A/1000000000)%10);
sig_print_dig((A/100000000)%10);
sig_print_dig((A/10000000)%10);
sig_print_dig((A/1000000)%10);
sig_print_dig((A/100000)%10);
sig_print_dig((A/10000)%10);
sig_print_dig((A/1000)%10);
sig_print_dig((A/100)%10);
sig_print_dig((A/10)%10);
sig_print_dig((A/1)%10);
}
void sig_print_hex(uint64_t A)
{
sig_print_dig((A>>7)&0xF);
sig_print_dig((A>>6)&0xF);
sig_print_dig((A>>5)&0xF);
sig_print_dig((A>>4)&0xF);
sig_print_dig((A>>3)&0xF);
sig_print_dig((A>>2)&0xF);
sig_print_dig((A>>1)&0xF);
sig_print_dig((A>>0)&0xF);
}
void Grid_usr_signal_handler(int sig,siginfo_t *si,void * ptr)
{
/*
fprintf(stderr,"Signal handler on host %s\n",hostname);
fprintf(stderr,"FlightRecorder step %d stage %s \n",
FlightRecorder::StepLoggingCounter,
FlightRecorder::StepName);
fprintf(stderr,"Caught signal %d\n",si->si_signo);
fprintf(stderr," process id %llu\n", (unsigned long long int)getpid());
fprintf(stderr," mem address %llx\n",(unsigned long long)si->si_addr);
fprintf(stderr," code %d\n",si->si_code);
// x86 64bit
@ -578,57 +628,111 @@ void Grid_usr_signal_handler(int sig,siginfo_t *si,void * ptr)
fprintf(stderr,"Called backtrace\n");
fflush(stdout);
fflush(stderr);
*/
SIGLOG("Signal handler on host ");
SIGLOG(hostname);
SIGLOG("\n");
SIGLOG("FlightRecorder step ");
sig_print_uint(FlightRecorder::StepLoggingCounter);
SIGLOG("\n");
SIGLOG("FlightRecorder stage ");
SIGLOG(FlightRecorder::StepName);
SIGLOG("\n");
SIGLOG("Caught signal ");
sig_print_uint(si->si_signo);
SIGLOG("\n");
SIGLOG(" process id ");
sig_print_uint((uint32_t)getpid());
SIGLOG("\n");
SIGLOG(" mem address ");
sig_print_hex((uint64_t)si->si_addr);
SIGLOG("\n");
SIGLOG(" code ");
sig_print_uint(si->si_code);
SIGLOG("\n");
SIGLOG("Backtrace:\n");
int symbols = backtrace (Grid_backtrace_buffer,_NBACKTRACE);
for (int i = 0; i < symbols; i++){
sig_print_hex((uint64_t)Grid_backtrace_buffer[i]);
SIGLOG("\n");
}
return;
}
void Grid_sa_signal_handler(int sig,siginfo_t *si,void * ptr)
{
fprintf(stderr,"Signal handler on host %s\n",hostname);
fprintf(stderr,"Caught signal %d\n",si->si_signo);
fprintf(stderr," mem address %llx\n",(unsigned long long)si->si_addr);
fprintf(stderr," code %d\n",si->si_code);
// Linux/Posix
#ifdef __linux__
// And x86 64bit
#ifdef __x86_64__
ucontext_t * uc= (ucontext_t *)ptr;
struct sigcontext *sc = (struct sigcontext *)&uc->uc_mcontext;
fprintf(stderr," instruction %llx\n",(unsigned long long)sc->rip);
#define REG(A) fprintf(stderr," %s %lx\n",#A,sc-> A);
REG(rdi);
REG(rsi);
REG(rbp);
REG(rbx);
REG(rdx);
REG(rax);
REG(rcx);
REG(rsp);
REG(rip);
SIGLOG("Signal handler on host ");
SIGLOG(hostname);
SIGLOG("\n");
SIGLOG("FlightRecorder step ");
sig_print_uint(FlightRecorder::StepLoggingCounter);
SIGLOG("\n");
SIGLOG("FlightRecorder stage ");
SIGLOG(FlightRecorder::StepName);
SIGLOG("\n");
SIGLOG("Caught signal ");
sig_print_uint(si->si_signo);
SIGLOG("\n");
SIGLOG(" process id ");
sig_print_uint((uint32_t)getpid());
SIGLOG("\n");
SIGLOG(" mem address ");
sig_print_hex((uint64_t)si->si_addr);
SIGLOG("\n");
SIGLOG(" code ");
sig_print_uint(si->si_code);
SIGLOG("\n");
REG(r8);
REG(r9);
REG(r10);
REG(r11);
REG(r12);
REG(r13);
REG(r14);
REG(r15);
#endif
#endif
fflush(stderr);
BACKTRACEFP(stderr);
fprintf(stderr,"Called backtrace\n");
fflush(stdout);
fflush(stderr);
SIGLOG("Backtrace:\n");
int symbols = backtrace (Grid_backtrace_buffer,_NBACKTRACE);
for (int i = 0; i < symbols; i++){
sig_print_hex((uint64_t)Grid_backtrace_buffer[i]);
SIGLOG("\n");
}
exit(0);
return;
};
void Grid_empty_signal_handler(int sig,siginfo_t *si,void * ptr)
{
}
void Grid_debug_heartbeat(void)
{
struct sigaction sa_ping;
sigemptyset (&sa_ping.sa_mask);
sa_ping.sa_sigaction= Grid_usr_signal_handler;
sa_ping.sa_flags = SA_SIGINFO;
sigaction(SIGALRM,&sa_ping,NULL);
// repeating 10s heartbeat
struct itimerval it_val;
it_val.it_value.tv_sec = 10;
it_val.it_value.tv_usec = 1000;
it_val.it_interval = it_val.it_value;
setitimer(ITIMER_REAL, &it_val, NULL);
}
void Grid_heartbeat(void)
{
struct sigaction sa_ping;
sigemptyset (&sa_ping.sa_mask);
sa_ping.sa_sigaction= Grid_empty_signal_handler;
sa_ping.sa_flags = SA_SIGINFO;
sigaction(SIGALRM,&sa_ping,NULL);
// repeating 10s heartbeat
struct itimerval it_val;
it_val.it_value.tv_sec = 10;
it_val.it_value.tv_usec = 1000;
it_val.it_interval = it_val.it_value;
setitimer(ITIMER_REAL, &it_val, NULL);
}
void Grid_exit_handler(void)
{
// BACKTRACEFP(stdout);
// fflush(stdout);
BACKTRACEFP(stdout);
fflush(stdout);
}
void Grid_debug_handler_init(void)
{

4
Grid/util/Init.h
View File

@ -38,7 +38,11 @@ char * GridHostname(void);
// internal, controled with --handle
void Grid_sa_signal_handler(int sig,siginfo_t *si,void * ptr);
void Grid_usr_signal_handler(int sig,siginfo_t *si,void * ptr);
void Grid_empty_signal_handler(int sig,siginfo_t *si,void * ptr);
void Grid_debug_handler_init(void);
void Grid_debug_heartbeat(void);
void Grid_heartbeat(void);
void Grid_quiesce_nodes(void);
void Grid_unquiesce_nodes(void);