Stephan Dollberg

Changing c-states breaks magic-trace / IPT

3

I was experiencing issues where my traces were completely empty around the snapshot. After investigating the perf file it hinted at "instruction trace errors" which led me to https://perf.wiki.kernel.org/index.php/Perf_tools_support_for_Intel%C2%AE_Processor_Trace which...

Stack collapsing fails for C++ enum non-type template parameters

2

Hello, taking the following C++ code as an example: ``` #include enum some_enum { enum_a, enum_b }; template struct foo { void bar() { std::cout

Range Interface

10

Hi, I am wondering whether you have put any thought or what you think about providing a range interface via fake-iterators/`begin/end`? So that we could use the channel as one...

Crash/assert in seastar::aio_general_context::flush(): Assertion `clock::now() < retry_until' failed.

23

Hi folks, in Redpanda we experience the following assert/crash under heavy load: ``` seastar::aio_general_context::flush(): Assertion `clock::now() < retry_until' failed. ``` https://github.com/scylladb/seastar/blob/master/src/core/reactor_backend.cc#L349-L356 ``` [Backtrace #0] void seastar::backtrace(seastar::backtrace_buffer::append_backtrace()::{lambda(seastar::frame)#1}&&) at /v/build/v_deps_build/seastar-prefix/src/seastar/include/seastar/util/backtrace.hh:60 (inlined by)...

metrics: Add update_aggregate_labels()

10

Extends the metrics api to allow changing the aggregation labels of a metrics family. Otherwise one had to un-register every single metric instance in a metric family and then re-register...

CI Failure (Internal Server Error) in `EndToEndShadowIndexingTestWithDisruptions.test_write_with_node_failures`

8

https://buildkite.com/redpanda/redpanda/builds/40810 ``` Module: rptest.tests.e2e_shadow_indexing_test Class: EndToEndShadowIndexingTestWithDisruptions Method: test_write_with_node_failures Arguments: { "cloud_storage_type": 1 } ``` ``` test_id: EndToEndShadowIndexingTestWithDisruptions.test_write_with_node_failures status: FAIL run time: 124.586 seconds HTTPError('500 Server Error: Internal Server Error for...

segment_map: Also segment the bucket array

2

In segmented mode we only applied the segmenting to the values array but not the bucket array. As a result there the pattern of there still being a deallocation followed...

## Backports Required - [ ] none - not a bug fix - [ ] none - this is a backport - [ ] none - issue does not exist...

CI Failure (BadLogLines) in `RandomNodeOperationsTest.test_node_operations`

1

https://buildkite.com/redpanda/vtools/builds/10520 ``` Module: rptest.tests.random_node_operations_test Class: RandomNodeOperationsTest Method: test_node_operations Arguments: { "num_to_upgrade": 0, "enable_failures": true, "with_tiered_storage": true } ``` ``` test_id: RandomNodeOperationsTest.test_node_operations status: FAIL run time: 1894.949 seconds Traceback (most recent...

In the segment_appender we adaptively increase the file size of log segments using `ss::file::allocate`. This however doesn't immediately do what's intended. Internally it calls `fallocate` with the `FALLOC_FL_KEEP_SIZE|FALLOC_FL_ZERO_RANGE` flags. The...