chore(3p/nix): unvendor tvix 0.1 r/4098

Nothing is using this now, and we'll likely never pick this up again,
but we learned a lot in the process.

Every now and then this breaks in some bizarre way on channel bumps
and it's just a waste of time to maintain that.

Change-Id: Idcf2f5acd4ca7070ce18d7149cbfc0d967dc0a44
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5632
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: lukegb <lukegb@tvl.fyi>
Autosubmit: tazjin <tazjin@tvl.su>

1 files changed, 0 insertions, 60 deletions

diff --git a/third_party/nix/src/libutil/affinity.cc b/third_party/nix/src/libutil/affinity.cc
deleted file mode 100644
index 03fbe1243992..000000000000
--- a/third_party/nix/src/libutil/affinity.cc
+++ /dev/null
@@ -1,60 +0,0 @@
-#include "libutil/affinity.hh"
-
-#include <glog/logging.h>
-
-#include "libutil/types.hh"
-#include "libutil/util.hh"
-
-#if __linux__
-#include <sched.h>
-#endif
-
-namespace nix {
-
-#if __linux__
-static bool didSaveAffinity = false;
-static cpu_set_t savedAffinity;
-#endif
-
-void setAffinityTo(int cpu) {
-#if __linux__
-  if (sched_getaffinity(0, sizeof(cpu_set_t), &savedAffinity) == -1) {
-    return;
-  }
-
-  didSaveAffinity = true;
-  DLOG(INFO) << "locking this thread to CPU " << cpu;
-  cpu_set_t newAffinity;
-  CPU_ZERO(&newAffinity);
-  CPU_SET(cpu, &newAffinity);
-  if (sched_setaffinity(0, sizeof(cpu_set_t), &newAffinity) == -1) {
-    LOG(ERROR) << "failed to lock thread to CPU " << cpu;
-  }
-#endif
-}
-
-int lockToCurrentCPU() {
-#if __linux__
-  int cpu = sched_getcpu();
-  if (cpu != -1) {
-    setAffinityTo(cpu);
-  }
-  return cpu;
-#else
-  return -1;
-#endif
-}
-
-void restoreAffinity() {
-#if __linux__
-  if (!didSaveAffinity) {
-    return;
-  }
-
-  if (sched_setaffinity(0, sizeof(cpu_set_t), &savedAffinity) == -1) {
-    LOG(ERROR) << "failed to restore affinity";
-  }
-#endif
-}
-
-}  // namespace nix