Refactor sigverify to stage for signing shreds on the GPU (#6635)

automerge

perf/benches/sigverify.rs

@@ -0,0 +1,44 @@
+#![feature(test)]
+
+extern crate test;
+
+use solana_perf::packet::to_packets;
+use solana_perf::recycler::Recycler;
+use solana_perf::sigverify;
+use solana_perf::test_tx::test_tx;
+use test::Bencher;
+
+#[bench]
+fn bench_sigverify(bencher: &mut Bencher) {
+    let tx = test_tx();
+
+    // generate packet vector
+    let batches = to_packets(&vec![tx; 128]);
+
+    let recycler = Recycler::default();
+    let recycler_out = Recycler::default();
+    // verify packets
+    bencher.iter(|| {
+        let _ans = sigverify::ed25519_verify(&batches, &recycler, &recycler_out);
+    })
+}
+
+#[bench]
+fn bench_get_offsets(bencher: &mut Bencher) {
+    let tx = test_tx();
+
+    // generate packet vector
+    let batches = to_packets(&vec![tx; 1024]);
+
+    let recycler = Recycler::default();
+    // verify packets
+    bencher.iter(|| {
+        let ans = sigverify::generate_offsets(&batches, &recycler);
+        assert!(ans.is_ok());
+        let ans = ans.unwrap();
+        recycler.recycle(ans.0);
+        recycler.recycle(ans.1);
+        recycler.recycle(ans.2);
+        recycler.recycle(ans.3);
+    })
+}