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Check return values of read, write and pipe in benchmarks.

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GitOrigin-RevId: f6ebba80d0b2c09a9918fde5a14afd532f61897a
This commit is contained in:
levlam 2018-10-25 18:48:17 +03:00
parent d0a6ef1f5b
commit df71b93768
2 changed files with 31 additions and 20 deletions
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13
benchmark/bench_misc.cpp
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@ -122,24 +122,23 @@ class PipeBench : public Benchmark {
public:
int p[2];
PipeBench() {
pipe(p);
}
string get_description() const override {
return "pipe write + read int32";
}
void start_up() override {
pipe(p);
int res = pipe(p);
CHECK(res == 0);
}
void run(int n) override {
int res = 0;
for (int i = 0; i < n; i++) {
int val = 1;
write(p[1], &val, sizeof(val));
read(p[0], &val, sizeof(val));
auto write_len = write(p[1], &val, sizeof(val));
CHECK(write_len == sizeof(val));
auto read_len = read(p[0], &val, sizeof(val));
CHECK(read_len == sizeof(val));
res += val;
}
do_not_optimize_away(res);

38
benchmark/bench_queue.cpp
View File

@ -57,18 +57,21 @@ class PipeQueue {
public:
void init() {
int new_pipe[2];
pipe(new_pipe);
int res = pipe(new_pipe);
CHECK(res == 0);
output = new_pipe[0];
input = new_pipe[1];
}
void put(qvalue_t value) {
write(input, &value, sizeof(value));
auto len = write(input, &value, sizeof(value));
CHECK(len == sizeof(value));
}
qvalue_t get() {
qvalue_t res;
read(output, &res, sizeof(res));
auto len = read(output, &res, sizeof(res));
CHECK(len == sizeof(res));
return res;
}
@ -193,11 +196,14 @@ class EventfdQueue {
void put(qvalue_t value) {
q.put(value);
td::int64 x = 1;
write(fd, &x, sizeof(x));
auto len = write(fd, &x, sizeof(x));
CHECK(len == sizeof(x));
}
qvalue_t get() {
td::int64 x;
read(fd, &x, sizeof(x));
auto len = read(fd, &x, sizeof(x));
CHECK(len == sizeof(x));
CHECK(x == 1);
return q.get();
}
void destroy() {
@ -351,7 +357,8 @@ class BufferedFdQueue {
td::int64 x = 1;
__sync_synchronize();
if (wait_flag.load(MODE)) {
write(fd, &x, sizeof(x));
auto len = write(fd, &x, sizeof(x));
CHECK(len == sizeof(x));
}
}
void put_noflush(qvalue_t value) {
@ -362,7 +369,8 @@ class BufferedFdQueue {
td::int64 x = 1;
__sync_synchronize();
if (wait_flag.load(MODE)) {
write(fd, &x, sizeof(x));
auto len = write(fd, &x, sizeof(x));
CHECK(len == sizeof(x));
}
}
void flush_reader() {
@ -393,7 +401,8 @@ class BufferedFdQueue {
wait_flag.store(1, MODE);
__sync_synchronize();
while (!(res = q.update_reader())) {
read(fd, &x, sizeof(x));
auto len = read(fd, &x, sizeof(x));
CHECK(len == sizeof(x));
__sync_synchronize();
}
wait_flag.store(0, MODE);
@ -416,7 +425,8 @@ class BufferedFdQueue {
wait_flag.store(1, MODE);
__sync_synchronize();
while (!q.update_reader()) {
read(fd, &x, sizeof(x));
auto len = read(fd, &x, sizeof(x));
CHECK(len == sizeof(x));
__sync_synchronize();
}
wait_flag.store(0, MODE);
@ -445,12 +455,14 @@ class FdQueue {
td::int64 x = 1;
__sync_synchronize();
if (wait_flag.load(MODE)) {
write(fd, &x, sizeof(x));
auto len = write(fd, &x, sizeof(x));
CHECK(len == sizeof(x));
}
}
qvalue_t get() {
// td::int64 x;
// read(fd, &x, sizeof(x));
// auto len = read(fd, &x, sizeof(x));
// CHECK(len == sizeof(x));
// return q.get();
Backoff backoff;
@ -467,13 +479,13 @@ class FdQueue {
wait_flag.store(1, MODE);
__sync_synchronize();
// std::fprintf(stderr, "!\n");
// while (res == -1 && read(fd, &x, sizeof(x))) {
// while (res == -1 && read(fd, &x, sizeof(x)) == sizeof(x)) {
// res = q.try_get();
//}
do {
__sync_synchronize();
res = q.try_get();
} while (res == -1 && read(fd, &x, sizeof(x)));
} while (res == -1 && read(fd, &x, sizeof(x)) == sizeof(x));
q.acquire();
wait_flag.store(0, MODE);
return res;