varun-r-mallya/sysprof
1
0
Fork 0
mirror of https://github.com/varun-r-mallya/sysprof.git synced 2025-12-31 20:36:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

libsysprof: fallback to software perf counters

Browse Source 
If we fail to enable hardware perf counters, fallback to software perf
counters. This fixes Sysprof to work on Fedora Asahi.
This commit is contained in:
Christian Hergert
2023-10-23 22:27:04 +00:00
parent 98634cdaa6
commit d852115de1
1 changed files with 21 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
src/libsysprof/sysprof-sampler.c
View File

@ -256,6 +256,7 @@ sysprof_sampler_prepare_fiber (gpointer user_data)
struct perf_event_attr attr = {0};
gboolean with_mmap2 = TRUE;
guint n_cpu;
gboolean use_software = FALSE;
g_assert (prepare != NULL);
g_assert (SYSPROF_IS_RECORDING (prepare->recording));
@ -314,9 +315,18 @@ try_again:
attr.size = sizeof attr;
attr.type = PERF_TYPE_HARDWARE;
attr.config = PERF_COUNT_HW_CPU_CYCLES;
attr.sample_period = 1200000;
if (use_software)
{
attr.type = PERF_TYPE_SOFTWARE;
attr.config = PERF_COUNT_SW_CPU_CLOCK;
attr.sample_period = 1000000;
}
else
{
attr.type = PERF_TYPE_HARDWARE;
attr.config = PERF_COUNT_HW_CPU_CYCLES;
attr.sample_period = 1200000;
}
if (!(connection = dex_await_object (dex_bus_get (G_BUS_TYPE_SYSTEM), &error)))
return dex_future_new_for_error (g_steal_pointer (&error));
@ -367,6 +377,14 @@ try_again:
goto try_again;
}
if (use_software == FALSE)
{
with_mmap2 = TRUE;
use_software = TRUE;
g_ptr_array_remove_range (futures, 0, futures->len);
goto try_again;
}
return dex_future_new_for_error (g_steal_pointer (&error));
}
}