| Message ID | 20240619194109.248066-1-fdurso@google.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | linux-user: open_self_stat: Implement num_threads | expand |
"Fabio D'Urso" <fdurso@google.com> writes: > The num_threads field reports the total number of threads in the > process. In QEMU, this is equal to the number of CPU instances. > > Signed-off-by: Fabio D'Urso <fdurso@google.com> > --- > linux-user/syscall.c | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/linux-user/syscall.c b/linux-user/syscall.c > index b9b5a387b3..a47b2eeb65 100644 > --- a/linux-user/syscall.c > +++ b/linux-user/syscall.c > @@ -8171,6 +8171,16 @@ static int open_self_stat(CPUArchState *cpu_env, int fd) > } else if (i == 3) { > /* ppid */ > g_string_printf(buf, FMT_pid " ", getppid()); > + } else if (i == 19) { > + /* num_threads */ > + int cpus = 0; > + WITH_RCU_READ_LOCK_GUARD() { > + CPUState *cpu_iter; > + CPU_FOREACH(cpu_iter) { > + cpus++; > + } > + } > + g_string_printf(buf, "%d ", cpus); Looks ok to me. Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index b9b5a387b3..a47b2eeb65 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -8171,6 +8171,16 @@ static int open_self_stat(CPUArchState *cpu_env, int fd) } else if (i == 3) { /* ppid */ g_string_printf(buf, FMT_pid " ", getppid()); + } else if (i == 19) { + /* num_threads */ + int cpus = 0; + WITH_RCU_READ_LOCK_GUARD() { + CPUState *cpu_iter; + CPU_FOREACH(cpu_iter) { + cpus++; + } + } + g_string_printf(buf, "%d ", cpus); } else if (i == 21) { /* starttime */ g_string_printf(buf, "%" PRIu64 " ", ts->start_boottime);
The num_threads field reports the total number of threads in the process. In QEMU, this is equal to the number of CPU instances. Signed-off-by: Fabio D'Urso <fdurso@google.com> --- linux-user/syscall.c | 10 ++++++++++ 1 file changed, 10 insertions(+)