On Fri, 9 Apr 2021 at 16:12, Thomas Munro <thomas.mu...@gmail.com> wrote: > From your description it sounds like signals are not arriving at all, > rather than some more complicated race. Let's go back to basics... > what does the attached program print for you? I see: > > tmunro@x1:~/junk$ cc test-signalfd.c > tmunro@x1:~/junk$ ./a.out > blocking SIGURG... > creating a signalfd to receive SIGURG... > creating an epoll set... > adding signalfd to epoll set... > polling the epoll set... 0 > sending a signal... > polling the epoll set... 1
I get pretty much the same. Some additional info below, although not sure if it'd be of any help here. robins@WSLv1:~/proj/hackers$ cc test-signalfd.c robins@WSLv1:~/proj/hackers$ ./a.out blocking SIGURG... creating a signalfd to receive SIGURG... creating an epoll set... adding signalfd to epoll set... polling the epoll set... 0 sending a signal... polling the epoll set... 1 robins@WSLv1:~/proj/hackers$ cat /proc/cpuinfo | egrep 'flags|model' | sort -u flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave osxsave avx f16c rdrand lahf_lm abm 3dnowprefetch fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt intel_pt ibrs ibpb stibp ssbd model : 142 model name : Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz robins@WSLv1:~/proj/hackers$ uname -a Linux WSLv1 4.4.0-19041-Microsoft #488-Microsoft Mon Sep 01 13:43:00 PST 2020 x86_64 x86_64 x86_64 GNU/Linux C:>wsl -l -v NAME STATE VERSION * Ubuntu-18.04 Running 1 - robins
