hi, i just found out, that my (life) running server process, running unter valgrind (because it's beta) is eating up 100% cpu, however, clients connecting to it are served just fine, in terms of speed / responsivity.
As I should not just kill the process by now, I did an strace on it, to find out more, and saw, that it was actually *flooding* me with the following output. write(1018, "Y", 1) = 1 rt_sigprocmask(SIG_SETMASK, [], ~[ILL TRAP BUS FPE KILL SEGV STOP], 8) = 0 read(186, "", 558) = 0 rt_sigprocmask(SIG_SETMASK, ~[ILL TRAP BUS FPE KILL SEGV STOP], NULL, 8) = 0 gettid() = 30593 read(1017, "Y", 1) = 1 gettid() = 30593 write(1018, "Z", 1) = 1 rt_sigprocmask(SIG_SETMASK, [], ~[ILL TRAP BUS FPE KILL SEGV STOP], 8) = 0 read(155, "", 556) = 0 rt_sigprocmask(SIG_SETMASK, ~[ILL TRAP BUS FPE KILL SEGV STOP], NULL, 8) = 0 gettid() = 30593 read(1017, "Z", 1) = 1 gettid() = 30593 write(1018, "A", 1) = 1 rt_sigprocmask(SIG_SETMASK, [], ~[ILL TRAP BUS FPE KILL SEGV STOP], 8) = 0 read(179, "", 2830) = 0 rt_sigprocmask(SIG_SETMASK, ~[ILL TRAP BUS FPE KILL SEGV STOP], NULL, 8) = 0 gettid() = 30593 read(1017, "A", 1) = 1 gettid() = 30593 write(1018, "B", 1) = 1 rt_sigprocmask(SIG_SETMASK, [], ~[ILL TRAP BUS FPE KILL SEGV STOP], 8) = 0 read(163, "", 2950) = 0 rt_sigprocmask(SIG_SETMASK, ~[ILL TRAP BUS FPE KILL SEGV STOP], NULL, 8) = 0 gettid() = 30593 read(1017, "B", 1) = 1 gettid() = 30593 write(1018, "C", 1) = 1 rt_sigprocmask(SIG_SETMASK, [], ~[ILL TRAP BUS FPE KILL SEGV STOP], 8) = 0 read(162, "", 2952) = 0 rt_sigprocmask(SIG_SETMASK, ~[ILL TRAP BUS FPE KILL SEGV STOP], NULL, 8) = 0 gettid() = 30593 read(1017, "C", 1) = 1 gettid() = 30593 the file descriptors 1016, 1017 and 1018 belong to valgrind, and it looks like valgrind is very talkative to my app (or the other way around) with just a singe letter byte incrementing on each write()/read() to/from its pipe. What is that? How could that have happen, that it seems to be the reason, that my app is taking up to 100% CPU load? Thanks in advance, Christian Parpart. ------------------------------------------------------------------------------ Achieve unprecedented app performance and reliability What every C/C++ and Fortran developer should know. Learn how Intel has extended the reach of its next-generation tools to help boost performance applications - inlcuding clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ Valgrind-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/valgrind-users
