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Merge remote-tracking branch 'tor-gitlab/mr/269' into maint-0.4.5
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commit
3d952b461d
6
changes/bug24857
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6
changes/bug24857
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o Minor bugfixes (directory cache, performance, windows):
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- Limit the number of items in the consensus diff cache to 64 on Windows.
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We hope this will resolve an issue where Windows relay operators reported
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Tor using 100% CPU while we investigate better solutions. Fixes bug 24857;
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bugfix on tor-0.3.1.1-alpha.
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@ -177,6 +177,16 @@ typedef struct cdm_diff_t {
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/** Hashtable mapping flavor and source consensus digest to status. */
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static HT_HEAD(cdm_diff_ht, cdm_diff_t) cdm_diff_ht = HT_INITIALIZER();
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#ifdef _WIN32
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// XXX(ahf): For tor#24857, a contributor suggested that on Windows, the CPU
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// begins to spike at 100% once the number of files handled by the consensus
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// diff manager becomes larger than 64. To see if the issue goes away, we
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// hardcode this value to 64 now while we investigate a better solution.
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# define CACHE_MAX_NUM 64
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#else
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# define CACHE_MAX_NUM 128
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#endif
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/**
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* Configuration for this module
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*/
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@ -184,7 +194,7 @@ static consdiff_cfg_t consdiff_cfg = {
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// XXXX I'd like to make this number bigger, but it interferes with the
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// XXXX seccomp2 syscall filter, which tops out at BPF_MAXINS (4096)
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// XXXX rules.
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/* .cache_max_num = */ 128
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/* .cache_max_num = */ CACHE_MAX_NUM
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};
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static int consdiffmgr_ensure_space_for_files(int n);
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