From c4af96ee7ee36315ff87ec89e0aeb411e67ba26c Mon Sep 17 00:00:00 2001
From: Bojan Serafimov <bojan@pop-os.localdomain>
Date: Tue, 21 Nov 2023 12:15:49 -0500
Subject: [PATCH] wip

---
 pageserver/flamegraph.svg        | 414 -------------------------------
 pageserver/src/bin/pageserver.rs |   4 +-
 pageserver/src/import_datadir.rs |   7 +-
 pageserver/src/profiling.rs      |   2 +-
 pageserver/src/tenant/blob_io.rs |   1 -
 5 files changed, 7 insertions(+), 421 deletions(-)
 delete mode 100644 pageserver/flamegraph.svg

diff --git a/pageserver/flamegraph.svg b/pageserver/flamegraph.svg
deleted file mode 100644
index 869a445d4c..0000000000
--- a/pageserver/flamegraph.svg
+++ /dev/null
@@ -1,414 +0,0 @@
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-#unzoom { cursor:pointer; }
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y="623.50">pageserver::tenant::storage_layer::inmemory_layer::InMemoryLayer::put_value::{{closure}}</text></g><g><title>utils::vec_map::VecMap&lt;K,V&gt;::append_or_update_last (2 samples, 2.60%)</title><rect x="50.6494%" y="597" width="2.5974%" height="15" fill="rgb(216,154,8)" fg:x="39" fg:w="2"/><text x="50.7694%" y="607.50">utils::..</text></g><g><title>utils::vec_map::VecMap&lt;K,V&gt;::instrument_vec_op (1 samples, 1.30%)</title><rect x="51.9481%" y="581" width="1.2987%" height="15" fill="rgb(244,35,45)" fg:x="40" fg:w="1"/><text x="52.0681%" y="591.50">ut..</text></g><g><title>utils::vec_map::VecMap&lt;K,V&gt;::append_or_update_last::{{closure}} (1 samples, 1.30%)</title><rect x="51.9481%" y="565" width="1.2987%" height="15" fill="rgb(251,115,12)" fg:x="40" fg:w="1"/><text x="52.0681%" y="575.50">ut..</text></g><g><title>alloc::vec::Vec&lt;T,A&gt;::push (1 samples, 1.30%)</title><rect x="51.9481%" y="549" width="1.2987%" height="15" fill="rgb(240,54,50)" fg:x="40" 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x="54.5455%" y="581" width="2.5974%" height="15" fill="rgb(209,38,44)" fg:x="42" fg:w="2"/><text x="54.6655%" y="591.50">&lt;tokio:..</text></g><g><title>tokio::sync::batch_semaphore::Semaphore::release (1 samples, 1.30%)</title><rect x="55.8442%" y="565" width="1.2987%" height="15" fill="rgb(236,212,23)" fg:x="43" fg:w="1"/><text x="55.9642%" y="575.50">to..</text></g><g><title>&lt;F as core::future::into_future::IntoFuture&gt;::into_future (1 samples, 1.30%)</title><rect x="57.1429%" y="565" width="1.2987%" height="15" fill="rgb(242,79,21)" fg:x="44" fg:w="1"/><text x="57.2629%" y="575.50">&lt;F..</text></g><g><title>pageserver::pgdatadir_mapping::DatadirModification::commit::{{closure}} (41 samples, 53.25%)</title><rect x="7.7922%" y="661" width="53.2468%" height="15" fill="rgb(211,96,35)" fg:x="6" fg:w="41"/><text x="7.9122%" y="671.50">pageserver::pgdatadir_mapping::DatadirModification::commit::{{closure}}</text></g><g><title>pageserver::tenant::timeline::TimelineWriter::put::{{closure}} (32 samples, 41.56%)</title><rect x="19.4805%" y="645" width="41.5584%" height="15" fill="rgb(253,215,40)" fg:x="15" fg:w="32"/><text x="19.6005%" y="655.50">pageserver::tenant::timeline::TimelineWriter::put::{{closure}}</text></g><g><title>pageserver::tenant::timeline::Timeline::put_value::{{closure}} (32 samples, 41.56%)</title><rect x="19.4805%" y="629" width="41.5584%" height="15" fill="rgb(211,81,21)" fg:x="15" fg:w="32"/><text x="19.6005%" y="639.50">pageserver::tenant::timeline::Timeline::put_value::{{closure}}</text></g><g><title>pageserver::tenant::timeline::Timeline::get_layer_for_write::{{closure}} (6 samples, 7.79%)</title><rect x="53.2468%" y="613" width="7.7922%" height="15" fill="rgb(208,190,38)" fg:x="41" fg:w="6"/><text x="53.3668%" y="623.50">pageserver::tenant::timel..</text></g><g><title>tokio::sync::rwlock::RwLock&lt;T&gt;::write::{{closure}} (3 samples, 3.90%)</title><rect x="57.1429%" y="597" width="3.8961%" height="15" fill="rgb(235,213,38)" fg:x="44" fg:w="3"/><text x="57.2629%" y="607.50">tokio::sync..</text></g><g><title>tokio::sync::rwlock::RwLock&lt;T&gt;::write::{{closure}}::{{closure}} (3 samples, 3.90%)</title><rect x="57.1429%" y="581" width="3.8961%" height="15" fill="rgb(237,122,38)" fg:x="44" fg:w="3"/><text x="57.2629%" y="591.50">tokio::sync..</text></g><g><title>tokio::sync::batch_semaphore::Semaphore::acquire (2 samples, 2.60%)</title><rect x="58.4416%" y="565" width="2.5974%" height="15" fill="rgb(244,218,35)" fg:x="45" fg:w="2"/><text x="58.5616%" y="575.50">tokio::..</text></g><g><title>core::ptr::drop_in_place&lt;std::sync::rwlock::RwLockReadGuard&lt;std::collections::hash::map::HashMap&lt;pageserver_api::reltag::RelTag,(utils::lsn::Lsn,u32)&gt;&gt;&gt; (5 samples, 6.49%)</title><rect x="61.0390%" y="581" width="6.4935%" height="15" fill="rgb(240,68,47)" fg:x="47" fg:w="5"/><text x="61.1590%" y="591.50">core::ptr::drop_in_p..</text></g><g><title>&lt;std::sync::rwlock::RwLockReadGuard&lt;T&gt; as core::ops::drop::Drop&gt;::drop (5 samples, 6.49%)</title><rect x="61.0390%" y="565" width="6.4935%" height="15" fill="rgb(210,16,53)" fg:x="47" fg:w="5"/><text x="61.1590%" y="575.50">&lt;std::sync::rwlock::..</text></g><g><title>std::sys::unix::locks::futex_rwlock::RwLock::read_unlock (5 samples, 6.49%)</title><rect x="61.0390%" y="549" width="6.4935%" height="15" fill="rgb(235,124,12)" fg:x="47" fg:w="5"/><text x="61.1590%" y="559.50">std::sys::unix::lock..</text></g><g><title>core::sync::atomic::AtomicU32::fetch_sub (5 samples, 6.49%)</title><rect x="61.0390%" y="533" width="6.4935%" height="15" fill="rgb(224,169,11)" fg:x="47" fg:w="5"/><text x="61.1590%" y="543.50">core::sync::atomic::..</text></g><g><title>core::sync::atomic::atomic_sub (5 samples, 6.49%)</title><rect 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x="67.5325%" y="501" width="1.2987%" height="15" fill="rgb(216,164,2)" fg:x="52" fg:w="1"/><text x="67.6525%" y="511.50">co..</text></g><g><title>&lt;pageserver_api::reltag::RelTag as core::hash::Hash&gt;::hash (1 samples, 1.30%)</title><rect x="67.5325%" y="485" width="1.2987%" height="15" fill="rgb(220,129,5)" fg:x="52" fg:w="1"/><text x="67.6525%" y="495.50">&lt;p..</text></g><g><title>core::hash::impls::&lt;impl core::hash::Hash for u32&gt;::hash (1 samples, 1.30%)</title><rect x="67.5325%" y="469" width="1.2987%" height="15" fill="rgb(242,17,10)" fg:x="52" fg:w="1"/><text x="67.6525%" y="479.50">co..</text></g><g><title>core::hash::Hasher::write_u32 (1 samples, 1.30%)</title><rect x="67.5325%" y="453" width="1.2987%" height="15" fill="rgb(242,107,0)" fg:x="52" fg:w="1"/><text x="67.6525%" y="463.50">co..</text></g><g><title>&lt;std::collections::hash::map::DefaultHasher as core::hash::Hasher&gt;::write (1 samples, 1.30%)</title><rect x="67.5325%" y="437" width="1.2987%" height="15" fill="rgb(251,28,31)" fg:x="52" fg:w="1"/><text x="67.6525%" y="447.50">&lt;s..</text></g><g><title>&lt;core::hash::sip::SipHasher13 as core::hash::Hasher&gt;::write (1 samples, 1.30%)</title><rect x="67.5325%" y="421" width="1.2987%" height="15" fill="rgb(233,223,10)" fg:x="52" fg:w="1"/><text x="67.6525%" y="431.50">&lt;c..</text></g><g><title>&lt;core::hash::sip::Hasher&lt;S&gt; as core::hash::Hasher&gt;::write (1 samples, 1.30%)</title><rect x="67.5325%" y="405" width="1.2987%" height="15" fill="rgb(215,21,27)" fg:x="52" fg:w="1"/><text x="67.6525%" y="415.50">&lt;c..</text></g><g><title>&lt;core::hash::sip::Sip13Rounds as core::hash::sip::Sip&gt;::c_rounds (1 samples, 1.30%)</title><rect x="67.5325%" y="389" width="1.2987%" height="15" fill="rgb(232,23,21)" fg:x="52" fg:w="1"/><text x="67.6525%" y="399.50">&lt;c..</text></g><g><title>core::num::&lt;impl u64&gt;::wrapping_add (1 samples, 1.30%)</title><rect x="67.5325%" y="373" width="1.2987%" height="15" fill="rgb(244,5,23)" fg:x="52" fg:w="1"/><text x="67.6525%" y="383.50">co..</text></g><g><title>pageserver::pgdatadir_mapping::&lt;impl pageserver::tenant::timeline::Timeline&gt;::get_rel_size::{{closure}} (1 samples, 1.30%)</title><rect x="68.8312%" y="613" width="1.2987%" height="15" fill="rgb(226,81,46)" fg:x="53" fg:w="1"/><text x="68.9512%" y="623.50">pa..</text></g><g><title>pageserver::pgdatadir_mapping::&lt;impl pageserver::tenant::timeline::Timeline&gt;::get_cached_rel_size (1 samples, 1.30%)</title><rect x="68.8312%" y="597" width="1.2987%" height="15" fill="rgb(247,70,30)" fg:x="53" fg:w="1"/><text x="68.9512%" y="607.50">pa..</text></g><g><title>std::sync::rwlock::RwLock&lt;T&gt;::read (1 samples, 1.30%)</title><rect x="68.8312%" y="581" width="1.2987%" height="15" fill="rgb(212,68,19)" fg:x="53" fg:w="1"/><text x="68.9512%" y="591.50">st..</text></g><g><title>std::sys::unix::locks::futex_rwlock::RwLock::read (1 samples, 1.30%)</title><rect x="68.8312%" y="565" 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width="10.3896%" height="15" fill="rgb(247,173,49)" fg:x="47" fg:w="8"/><text x="61.1590%" y="655.50">pageserver::walingest::WalIngest::..</text></g><g><title>pageserver::walingest::WalIngest::handle_rel_extend::{{closure}} (8 samples, 10.39%)</title><rect x="61.0390%" y="629" width="10.3896%" height="15" fill="rgb(224,114,35)" fg:x="47" fg:w="8"/><text x="61.1590%" y="639.50">pageserver::walingest::WalIngest::..</text></g><g><title>pageserver::pgdatadir_mapping::DatadirModification::put_rel_extend::{{closure}} (1 samples, 1.30%)</title><rect x="70.1299%" y="613" width="1.2987%" height="15" fill="rgb(245,159,27)" fg:x="54" fg:w="1"/><text x="70.2499%" y="623.50">pa..</text></g><g><title>pageserver::pgdatadir_mapping::DatadirModification::get::{{closure}} (1 samples, 1.30%)</title><rect x="70.1299%" y="597" width="1.2987%" height="15" fill="rgb(245,172,44)" fg:x="54" fg:w="1"/><text x="70.2499%" y="607.50">pa..</text></g><g><title>pageserver::tenant::timeline::Timeline::get::{{closure}} (1 samples, 1.30%)</title><rect x="70.1299%" y="581" width="1.2987%" height="15" fill="rgb(236,23,11)" fg:x="54" fg:w="1"/><text x="70.2499%" y="591.50">pa..</text></g><g><title>pageserver::tenant::timeline::Timeline::lookup_cached_page::{{closure}} (1 samples, 1.30%)</title><rect x="70.1299%" y="565" width="1.2987%" height="15" fill="rgb(205,117,38)" fg:x="54" fg:w="1"/><text x="70.2499%" y="575.50">pa..</text></g><g><title>pageserver::page_cache::PageCache::lookup_materialized_page::{{closure}} (1 samples, 1.30%)</title><rect x="70.1299%" y="549" width="1.2987%" height="15" fill="rgb(237,72,25)" fg:x="54" fg:w="1"/><text x="70.2499%" y="559.50">pa..</text></g><g><title>pageserver::page_cache::PageCache::try_get_pinned_slot_permit::{{closure}} (1 samples, 1.30%)</title><rect x="70.1299%" y="533" width="1.2987%" height="15" fill="rgb(244,70,9)" fg:x="54" fg:w="1"/><text x="70.2499%" y="543.50">pa..</text></g><g><title>&lt;tokio::time::timeout::Timeout&lt;T&gt; as core::future::future::Future&gt;::poll (1 samples, 1.30%)</title><rect x="70.1299%" y="517" width="1.2987%" height="15" fill="rgb(217,125,39)" fg:x="54" fg:w="1"/><text x="70.2499%" y="527.50">&lt;t..</text></g><g><title>tokio::sync::semaphore::Semaphore::acquire_owned::{{closure}} (1 samples, 1.30%)</title><rect x="70.1299%" y="501" width="1.2987%" height="15" fill="rgb(235,36,10)" fg:x="54" fg:w="1"/><text x="70.2499%" y="511.50">to..</text></g><g><title>&lt;tokio::sync::batch_semaphore::Acquire as core::future::future::Future&gt;::poll (1 samples, 1.30%)</title><rect x="70.1299%" y="485" width="1.2987%" height="15" fill="rgb(251,123,47)" fg:x="54" fg:w="1"/><text x="70.2499%" y="495.50">&lt;t..</text></g><g><title>pageserver::walingest::WalIngest::ingest_heapam_record::{{closure}} (5 samples, 6.49%)</title><rect x="71.4286%" y="661" width="6.4935%" height="15" fill="rgb(221,13,13)" fg:x="55" fg:w="5"/><text x="71.5486%" 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y="687.50">pageserver::walingest::WalIngest::ingest_record::{{closure}}</text></g><g><title>pageserver::walrecord::decode_wal_record (5 samples, 6.49%)</title><rect x="77.9221%" y="661" width="6.4935%" height="15" fill="rgb(246,228,12)" fg:x="60" fg:w="5"/><text x="78.0421%" y="671.50">pageserver::walrecor..</text></g><g><title>postgres_ffi::v14::xlog_utils::&lt;impl postgres_ffi::v14::bindings::XLogRecord&gt;::from_bytes (1 samples, 1.30%)</title><rect x="83.1169%" y="645" width="1.2987%" height="15" fill="rgb(213,55,15)" fg:x="64" fg:w="1"/><text x="83.2369%" y="655.50">po..</text></g><g><title>utils::bin_ser::LeSer::des_from (1 samples, 1.30%)</title><rect x="83.1169%" y="629" width="1.2987%" height="15" fill="rgb(209,9,3)" fg:x="64" fg:w="1"/><text x="83.2369%" y="639.50">ut..</text></g><g><title>bincode::config::Options::deserialize_from (1 samples, 1.30%)</title><rect x="83.1169%" y="613" width="1.2987%" height="15" fill="rgb(230,59,30)" fg:x="64" fg:w="1"/><text x="83.2369%" y="623.50">bi..</text></g><g><title>bincode::internal::deserialize_from (1 samples, 1.30%)</title><rect x="83.1169%" y="597" width="1.2987%" height="15" fill="rgb(209,121,21)" fg:x="64" fg:w="1"/><text x="83.2369%" y="607.50">bi..</text></g><g><title>bincode::internal::deserialize_from_seed (1 samples, 1.30%)</title><rect x="83.1169%" y="581" width="1.2987%" height="15" fill="rgb(220,109,13)" fg:x="64" fg:w="1"/><text x="83.2369%" y="591.50">bi..</text></g><g><title>bincode::internal::deserialize_from_custom_seed (1 samples, 1.30%)</title><rect x="83.1169%" y="565" width="1.2987%" height="15" fill="rgb(232,18,1)" fg:x="64" fg:w="1"/><text x="83.2369%" y="575.50">bi..</text></g><g><title>&lt;core::marker::PhantomData&lt;T&gt; as serde::de::DeserializeSeed&gt;::deserialize (1 samples, 1.30%)</title><rect x="83.1169%" y="549" width="1.2987%" height="15" fill="rgb(215,41,42)" fg:x="64" fg:w="1"/><text x="83.2369%" 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postgres_ffi::v14::bindings::XLogRecord&gt;::deserialize::__Visitor as serde::de::Visitor&gt;::visit_seq (1 samples, 1.30%)</title><rect x="83.1169%" y="485" width="1.2987%" height="15" fill="rgb(205,185,37)" fg:x="64" fg:w="1"/><text x="83.2369%" y="495.50">&lt;p..</text></g><g><title>&lt;bytes::bytes_mut::BytesMut as bytes::buf::buf_impl::Buf&gt;::advance (1 samples, 1.30%)</title><rect x="88.3117%" y="645" width="1.2987%" height="15" fill="rgb(238,207,15)" fg:x="68" fg:w="1"/><text x="88.4317%" y="655.50">&lt;b..</text></g><g><title>bytes::bytes_mut::BytesMut::set_start (1 samples, 1.30%)</title><rect x="88.3117%" y="629" width="1.2987%" height="15" fill="rgb(213,199,42)" fg:x="68" fg:w="1"/><text x="88.4317%" y="639.50">by..</text></g><g><title>&lt;bytes::bytes_mut::BytesMut as bytes::buf::buf_impl::Buf&gt;::copy_to_bytes (3 samples, 3.90%)</title><rect x="89.6104%" y="645" width="3.8961%" height="15" fill="rgb(235,201,11)" fg:x="69" fg:w="3"/><text x="89.7304%" 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\ No newline at end of file
diff --git a/pageserver/src/bin/pageserver.rs b/pageserver/src/bin/pageserver.rs
index c8af06fdfa..f8bf3a6cec 100644
--- a/pageserver/src/bin/pageserver.rs
+++ b/pageserver/src/bin/pageserver.rs
@@ -677,13 +677,12 @@ fn start_pageserver(
                 signal.name()
             );
 
-            #[cfg(feature = "profiling")]
             pageserver::profiling::exit_profiler(&profiler_guard);
 
             std::process::exit(111);
         }
 
-        Signal::Quit | Signal::Interrupt | Signal::Terminate => {
+        Signal::Interrupt | Signal::Terminate => {
             info!(
                 "Got {}. Terminating gracefully in fast shutdown mode",
                 signal.name()
@@ -696,7 +695,6 @@ fn start_pageserver(
             let bg_remote_storage = remote_storage.clone();
             let bg_deletion_queue = deletion_queue.clone();
 
-            #[cfg(feature = "profiling")]
             pageserver::profiling::exit_profiler(&profiler_guard);
 
             BACKGROUND_RUNTIME.block_on(pageserver::shutdown_pageserver(
diff --git a/pageserver/src/import_datadir.rs b/pageserver/src/import_datadir.rs
index f148d21d9c..bb21713fc0 100644
--- a/pageserver/src/import_datadir.rs
+++ b/pageserver/src/import_datadir.rs
@@ -655,9 +655,13 @@ mod tests {
         let started_at = std::time::Instant::now();
 
         // Feed bytes to the decoder
+        // TODO try feeding in many small chunks
         let xlogoff: usize = startpoint.segment_offset(WAL_SEGMENT_SIZE);
         let mut decoder = WalStreamDecoder::new(startpoint, pg_version);
-        decoder.feed_bytes(&bytes[xlogoff..]);
+        // decoder.feed_bytes(&bytes[xlogoff..]);
+        for chunk in bytes[xlogoff..].chunks(50) {
+            decoder.feed_bytes(chunk);
+        }
         println!("decoding {} bytes", bytes.len() - xlogoff);
 
         // Decode and ingest wal
@@ -674,7 +678,6 @@ mod tests {
         println!("done in {:?}", duration);
         drop(prof_guard);
 
-        #[cfg(feature = "profiling")]
         crate::profiling::exit_profiler(&profiler_guard);
 
         Ok(())
diff --git a/pageserver/src/profiling.rs b/pageserver/src/profiling.rs
index af59b0b491..b6b3658546 100644
--- a/pageserver/src/profiling.rs
+++ b/pageserver/src/profiling.rs
@@ -83,5 +83,5 @@ mod profiling_impl {
         None
     }
 
-    // pub fn exit_profiler(profiler_guard: &Option<pprof::ProfilerGuard>) {}
+    pub fn exit_profiler(profiler_guard: &Option<DummyProfilerGuard>) {}
 }
diff --git a/pageserver/src/tenant/blob_io.rs b/pageserver/src/tenant/blob_io.rs
index 050eeba7fe..760c64663d 100644
--- a/pageserver/src/tenant/blob_io.rs
+++ b/pageserver/src/tenant/blob_io.rs
@@ -356,7 +356,6 @@ mod tests {
         round_trip_test::<false>(&blobs).await?;
         round_trip_test::<true>(&blobs).await?;
 
-        #[cfg(feature = "profiling")]
         crate::profiling::exit_profiler(&profiler_guard);
         Ok(())
     }